Ampney and Poulton Brooks (source to Thames) - GB106039030300 Catchment area 73.5km2, length 16km. Not designated artificial or heavily modified. Expand Catchment area 73.5km2, length 16km. Not designated artificial or heavily modified. Water body description Relatively small spring-fed gravel bed river flowing mainly in a southerly direction. Owing to the Cotswold inferior oolite limestone geology there is a large seasonal flow variation until it reaches Ampney Park. At Ampney St Peter it runs on gravel overlaying clay retaining a summer flow. It is joined by Poulton Brook (a largely dense shaded straight channel) downstream and meets the Thames in the parish of Latton. The channel is overlarge and incised by high winter flows along its course. There are remains of weirs and side channels from the historic network of water meadows and areas of extensive channel straightening, particularly in the downstream stretches. A river habitat survey in September 2013(1) identified areas of extensive shading from tree planting within Ampney St Peter and scrubby hedgerows downstream. Outside these areas, there was good aquatic and marginal vegetation and meandering form. The brook is healthy in the upper reaches before sewage works and diffuse pollution from arable land impact on it. Under cycle 1 2009-2012 the Brook was classified Bad for fish element due to barriers to fish movement, seasonal water levels, and crayfish predation. From 2014-2016, under cycle 2, it has reached a moderate status for both phosphates and fish. Land Use and Designations Surrounding land is used for arable and semi-improved pasture for grazing, managed by a few large and several small landowners and there is active gravel mining downstream towards the confluence with the Thames. There is abstraction at Latton and Meysey Hampton under an abstraction permit. There are a few footpaths crossing the upstream sections of channel, with greater access downstream from Latton to the Thames. There are light local fly fishing and access rights for Cotswold fly fishers. Flora from catchment walkover (September 2013) 1 Amphibious bistort, Branched Bur-reed, Canadian pondweed, Duckweed, Fool’s Water Cress, Iris, Lesser water-parsnip, Meadowsweet, Reed Canary Grass, Reed Sweet Grass, Water Crowfoot, Water forget-me-not, Watermint, Watercress, Woody nightshade. Fauna from catchment walkover (September 2013) 1 Signal crayfish present, good river fly life. Fish include minnows, bullhead, and brown trout, along with dace and chub further downstream. Signs of otter and water vole have been recorded through stretches of Ampney Brook. Riparian birds included typical pasture, hedgerow and woodland species, also kingfisher, grey wagtail and grey heron. Conclusions of the WILD parish reports (1) Ampney Brook is of high ecological value, with a significant downstream value being particularly suitable for brown trout. However, it is still extensively modified and would benefit from enhancement. There are also signs of nutrient enrichment downstream of the sewage works at Ampney St Peter. Poulton Brook is of significant ecological value for its linear scrub and tall ruderal vegetation and is an important habitat for breeding birds and invertebrates. It is unlikely to provide habitat for aquatic species due to the regular drying of the channel. Catchment Issues Ampney St Peter village has flood risk (to buildings within 90m of the river). There is no flood risk to the slightly elevated Poulton, Down Ampney or Latton villages or Driffield village. Signal crayfish Nutrient enhancement downstream of sewage works and diffuse pollution from farmland Water with Integrated Local Delivery (WILD) Project, Rivers Management Plans, Poulton Parish, St Peter Parish, Driffield Parish, Down Ampney Parish and Latton Parish (May 2016) Water Framework Directive Water Framework Directive 2016 Cycle 2 failing due to fish and phosphates (moderate status) http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039030300 Click here to go back to the main waterbodies information page
Bydemill Brook (source to Thames) - GB106039023710 Catchment area 17km2, length 13.6km. Not designated artificial or heavily modified. Expand Banner Image @Harry McGregor Catchment area 17km2, length 13.6km. Not designated artificial or heavily modified. Waterbody description This waterbody rises to the north of Stratton St Margaret and flows in a northerly direction passing the village of Stratton and to the west of Highworth to join the River Thames near the village of Upper Inglesham which is south of Lechlade. Land Use and designations From the source the brook flows through woodland, a lake at Stanton Country Park (local nature reserve) and through farmland. It is crossed by the Thames path near the confluence with the Thames. Flora and Fauna Conclusions and Issues Water Framework Directive WFD 2016 (cycle 2) Moderate status owing to ‘Bad’ phosphate (from sewage discharge and poor nutrient management) and ‘Moderate’ Macrophyte and Phytobenthos elements. The waterbody has also in the past failed on invertebrates, dissolved oxygen and specific pollutants (ammonia and triclosan). It is likely to be technically infeasible and disproportionately expensive to achieve more than a Moderate Status. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023710 Click here to go back to the main waterbodies information page
Cerney Wick Brook (source to Thames) - GB106039023800 Catchment area 18.3km2, length 6.2km. Not designated artificial or heavily modified. Expand Catchment area 18.3km2, length 6.2km. Not designated artificial or heavily modified. Waterbody description The Cerney Wick Brook runs along the parish boundary of Ashton Keynes and South Cerney, entering the parish of Ashton Keynes at the northerly extent and then running in a south-easterly direction, reaching the River Thames to the northwest of Cricklade. It is a very small channel, only 0.3-0.5m wide, and often has very little water (5-30cm deep). It has consistently failed to reach good ecological status due to poor fish numbers and high levels of phosphates. The failures are considered due to point source pollution from South Cerney Waste Water Treatment works and physical modification of the channel. Land use and designations A river habitat survey in May 2015 (1) found the brook runs mainly through open countryside owned by a wide variety of landowners from farmers to leisure businesses and with one section bordering an industrial unit. Surrounding land is used for agricultural small holdings, semi-improved grassland and arable farmland. Ex-mineral extraction land now is used for nature reserves, sailing and fishing lakes. In places where livestock access the brook there is some damage to the bank and sedimentation of the watercourse. The Thames & Severn Way canal runs through the land and over the river. Overshading is a significant issue where the brook flows behind hedgerows and dense scrub and reduced sunlight is inhibiting marginal and aquatic plant growth. There is limited public access and it has a reputation for smelling due to the high input from South Cerney Waste Waste Treatment Works. Flora from preliminary assessment May 2015 (1): The banks were dominated by stinging nettles and shaded by hawthorn scrub, elder and willow trees. In less shaded areas there was marginal vegetation including Branched Bur-reed, Lesser water-parsnip, Water mint. There was little aquatic vegetation present but there was filamentous algae growing on the bed. Fauna from preliminary assessment May 2015 (1): Invertebrates included Common Blue damselflies and Beautiful damoiselle. Large Signal crayfish were present. The brook is known to have some small fish species such as Minnow and Bullhead. There was no indication of Water Vole, but signs of Otter were noted on and around the brook. Hedgerows and woodland bird species were noted including Song Thrush, a Red Listed species. Main conclusions from the WILD parish reports (1) Overall Cerney Wick Brook through South Cerney parish is of significant ecological value, mainly as a migration corridor with its associated scrub habitat rather than the brook itself. It would need significant investment in both water quality and habitat improvements to bring it up to good ecological status. Catchment issues There is no real risk of flooding to Ashton Keynes as the village itself over a kilometre away from the brook, however, there is a high risk of flooding throughout South Cerney Parish. Phosphate pollution from point and diffuse sources (Wastewater treatment works and land management) Signal crayfish are established in this water body. WILD Project, River Thames Management Plan, Ashton Keynes Parish (March 2016), South Cerney Parish (June 2015) Water Framework Directive WFD 2016 Cycle 2 failing due to fish and phosphates (poor status) http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023800 Click here to go back to the main waterbodies information page
Churn (Baunton to Cricklade) - GB106039029750 Catchment area 30.7km2, length 20.4km. Not designated artificial or heavily modified. Expand Catchment area 30.7km2, length 20.4km. Not designated artificial or heavily modified. Waterbody description This section of the river flows on from Perrots Brook through Baunton alongside the A435 road and through Cirencester town centre. After Cirencester, the river continues through the village of Siddington and farmland to South Cerney. It is frequently split to create mill-leat channels for historic watermill uses. It flows past small privately-owned fishing lakes and through the South Cerney outdoor recreation areas. After flowing through the village of Cerney Wick the river splits into two channels, the more northerly channel being created to supply various old mill buildings. it then re-converges before skirting Cricklade and joining the Thames. North of Siddington the river flows mainly over gravel substrate but there are some silty stretches where signal crayfish are causing bank erosion. It is subject to a wide fluctuation in water levels. Through Siddington it has a more natural meandering form with obvious areas of eroding banks. There is evidence of historic modification including channel enlargement and embanking in the water body, mill and flood meadow infrastructure. It has also been subjected to channel straightening throughout the South Cerney and Cricklade parishes. The modifications have reduced the biodiversity value of the river. The River Churn has previously failed to reach good ecological status due to inadequate numbers and/or diversity of fish. Reasons include insufficient water levels and flows during the summer, over-predation by signal crayfish, physical modifications of the river creating barriers to fish movements, urbanisation destroying habitat and land drainage/agricultural activities. In 2016 it reached a good status for fish and moderate for macrophytes and phytobenthos. Land use and designations Land use in the catchment includes semi-improved pasture for grazing, woodland, historic water management systems, residential, recreational and commercial business and aggregate extraction. The area is crossed by various footpaths, the Sustrans 45 cycleway, and the Thames & Severn Way canal. Stakeholders include Bathurst Estate, Cotswold Flyfishers (CFF), the Welcome Trust, and Cricklade Town Council. The North Meadow National Nature Reserve, managed by Natural England and the Cricklade Court Leet is a part of the North Meadow and Clattinger Farm Special Area of Conservation and is designated for its very important lowland haymeadow plant community (including the nationally important population of Snakeshead Fritillary). There is no bank-side fencing on the Nature Reserve (the Commonland status means it cannot be permanently fenced) and there is damage of the river banks and bed by cattle accessing the watercourse from the opposite side. There are also areas of over-shading which prevents the sunlight from reaching the water and water’s edge inhibiting marginal and aquatic plant growth. Flora from preliminary assessment On sections that are fenced, there are dense stands of Reed Sweet-grass, Canary grass and rushes. Typical wetlands plants found such as Fool’s water Cress and Lesser water-parsnip, Floating sweet grass and Amphibious bistort, Fools Water Cress, Water mint and Lesser water-parsnip. There are several large old Willow/Ash trees which have significant landscape and biodiversity value and native Black Poplar, a rare British tree included in the Cotswold Water Park Local Biodiversity Action Plan 2007-16 and currently the focus of a Gloucestershire FWAG tree planting project. Wildmoor way Meadows SSSI has unimproved grassland dominated by Crested Dogs tail, Common Knapweed and a healthy display of Southern Marsh Orchid. Himalayan balsam is a major problem through South Cerney and Cricklade with a stronghold due to interconnected drains and ditches between the river and the disused Thames & Severn canal. Fauna Signal crayfish are undermining the bank in places. Aquatic invertebrate life includes Beautiful damoiselle and Keeled Skimmer. Fish species are known to include Chub, Dace, Roach, Brown Trout (some natural and some stocked), Brook lamprey, Minnow, Bullhead and occasional Perch and Pike. Signs of Otter were recorded along this stretch of the river. A survey by Cotswold Water Park Trust in Autumn 2014 found Water Vole were present in low numbers. Kingfisher and Grey Wagtail were also recorded (Amber Listed species) and Song Thrush, Spotted Flycatcher and Yellowhammer (Red Listed species). Main conclusions from the WILD parish reports 1 Overall the Churn through Siddington parish is of high ecological value, particularly where the river has been fenced from livestock with a wide buffer. The river appears to have reasonable quality water due to the presence of indicator species such as Dipper. All sections have a high ecological potential that could be achieved by enhancements to riparian management some of which are already being implemented by the river tenants and the landowners. Through South Cerney and Cricklade parishes it is of significant ecological value, despite the modifications and the impact of some land uses and associated infrastructure, trees, and scrub. Through Cricklade, its main value to fish is during the winter when it has significant flow and it can act as a bypass channel. During the summer it generally is too dry, silty and lacking in aquatic vegetation to have much value for all but the smaller fish species, but it does have value for Water Vole. Catchment Issues Land to the south of Siddington is subject to flooding during high rainfall periods. There is also a relatively high risk of flooding throughout South Cerney and Cricklade parishes with most of the land being in the natural floodplain, however, the village/town are at low risk. North Meadow has always flooded throughout history and Natural England has improved the connectivity of the floodplain to the river. This catchment has a strong presence of invasive species; Signal crayfish and Himalayan balsam. WILD Project, River Churn Management Plan, South Cerney Parish (June 2015), Siddington Parish (April 2015), Ashton Keynes Parish (March 2016) Water Framework Directive WFD 2016 achieved a Moderate overall status with the Fish element ‘Good’ after being consistently bad or poor previously. Macrophytes and phytobenthos were assessed as Moderate. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039029750 Click here to go back to the main waterbodies information page
Churn (source to Perrots Brook) - GB106039029810 Catchment area 58.6km2, length 16.9km. Not designated artificial or heavily modified. Expand Catchment area 58.6km2, length 16.9km. Not designated artificial or heavily modified. Waterbody description The waterbody rises at Seven Springs (South of Cheltenham) and flows in a largely southerly direction alongside the A435 passing the villages of Cowley, Colesbourne, Rendcomb and North Cerney. Land use and designations Steeply sloped valley sides, woodland and farmland in the upper catchment. Crossed by Gloucestershire Way and Macmillan Way and followed by Monarch’s Way footpaths. Flora and Fauna Conclusions and issues Water Framework Directive WFD 2016 Moderate overall status owing to ecological elements Fish and Macrophytes and Phytobenthos. Under cycle 1 from 2009 to 2014 it had a Poor overall WFD status due to Phytobenthos and Fish and in 2014 under cycle 2 it achieved a Good overall status, falling to Moderate in 2015 with a reduced flow (due to suspected groundwater abstraction). http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039029810 Click here to go back to the main waterbodies information page
Coate Water - GB30642155 Catchment area 794km2, lake surface area 0.3km2, mean depth 2.8m, heavily modified. Expand Catchment area 794km2, lake surface area 0.3km2, mean depth 2.8m, heavily modified. Waterbody description Coate Water is a small lake making up a part of the Coate Water Country Park. It is located near junction 15 of the M5 5km southeast of central Swindon. Within the park there is a woodland, nature reserves and bird hides. Land Use and designations Recreational use for walking and nature watching. Flora and Fauna The lake is a valuable nesting site for waterfowl and reed bunting, with warblers present during the summer and spring. It is also an important habitat for dragonflies and damselflies, plus a wide range of fish such as carp, bream and pike. Conclusions and issues Water Framework Directive Water Framework Directive 2016 overall status Moderate, due to biological (phytoplankton) and physio-chemical elements (Total Phosphorus) and physical modifications. http://environment.data.gov.uk/catchment-planning/WaterBody/GB30642155 Click here to go back to the main waterbodies information page
Cole (Acorn Bridge to Bower Bridge) - GB106039022930 Catchment area 1,446 ha, length 6.1km. Not designated artificial or heavily modified. Expand Banner image @Harry McGregor Catchment area 1,446 ha, length 6.1km. Not designated artificial or heavily modified. Waterbody description This waterbordy follows on from Acorn Bridge (West of Bourton) flowing northerly direction under the A420 and a railway line. Land Use and designations Passes through woodland and farmland. Catchment also contains the village of Sevenhampton. Flora and Fauna Conclusions and issues Water Framework Directive The Water Framework Directive 2015 and 2016 overall status was Poor owing to ecological elements (macrophytes and phytobenthos and phosphates) due to point source (sewage) and diffuse source (from urban, transport and agriculture/land management) pollution. It also had a Moderate assessment for copper in 2013 and 2014. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039022930 Click here to go back to the main waterbodies information page
Cole (Bower Bridge to Thames) including Coleshill - GB106039023730 Catchment area 22.6km2, length 13.9km. Not designated artificial or heavily modified. Expand Catchment area 22.6km2, length 13.9km. Not designated artificial or heavily modified. Waterbody description The waterbody flows in a northerly direction from Bower Bridge, past the village of Coleshill towards Lechlade, where it joins the Thames. Modifications include a weir and land drainage, ditch infrastructure and channel straightening. Land Use and designations Initially the waterbody passes alongside woodland at Watchfield Common Wood (Nature Reserve) and farmland. The catchment also contains Coleshill Park, the eastern side of the town of Highworth and a solar farm at Upper Inglesham. Flora and Fauna Conclusions and issues Water Framework Directive From 2013 to 2016, under cycle 2, the overall status became Moderate (previously Poor) according to ecological elements. Phosphates have been Poor from sewage discharge since 2014 and Moderate for macrophytes and phytobenthos due to sewage discharge and diffuse pollution from agricultural and land management. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023730 Click here to go back to the main waterbodies information page
Cole (source to Lenta Brook) - GB106039022890 Catchment area 2,497 ha, length 6.9km. Not designated artificial or heavily modified. Expand Catchment area 2,497 ha, length 6.9km. Not designated artificial or heavily modified. Waterbody description The waterbody rises in the residential area of Walcot East (East Swindon) and flows in an easterly direction parallel to Drake’s Way under the A419 and out of the town into farmland. This waterbody contains the self-contained waterbody of Coate Water. Land Use and designations Urban area and farmland. Flora and Fauna Conclusions and issues Water Framework Directive WFD 2016 overall status Poor owing to ecological elements Macrophytes and Phytobenthos (poor), invertebrates (moderate) and phosphates (poor). The status was Good from 2009 to 2011 (cycle 1), however then falling to Moderate in 2012 and to Poor in 2015. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039022890 Click here to go back to the main waterbodies information page
Coln (from Coln Rogers) and Thames (Coln to Leach) - GB106039029992 Catchment area 52.3km2, length 28km. Not designated artificial or heavily modified. Expand Catchment area 52.3km2, length 28km, Not designated artificial or heavily modified. Waterbody description The River Coln is spring fed, rising north of Brockhampton, flows in a south-easterly direction (passing through villages of Withington, Fossebridge, Coln Rogers, Winson, Abington, Bibury, and Quenington) to join the Thames between Fairford and Lechlade. The underlying geology is limestone and the river has a gravel base. Stretches of the river have been modified, there are on-line lakes and ponds, mill buildings and a trout farm. Point source pollution arises from wastewater treatment works at Andoversford, Withington, Bibury, and Fairford. A River habitat survey was undertaken from Fairford parish to Lechlade April 2014 (1). Between Quenington and Fairford stretches have good meandering but it is modified through Fairford, damned by a mill, creating an online lake and split and straightened for a stretch reaching a weir before reconnecting. Further downstream the channel has been modified and is wider, shallower and straighter than natural. Banks have been damaged by public access and vehicle crossings. More natural meandering stretches have been managed to improve the ecology but there is overshading in areas. As the river approaches Lechlade it has good morphology with frequent meanders and the surrounding farming is well buffered. The main detrimental impacts here are from dense shading from non-native tree plantations and dense Himalayan Balsam growth. Land use and designations Through Fairford and Kempsford parishes and around Lechlade the land use next to the river is largely grazing for cattle and sheep with some arable, woodland planting, holiday homes, recreation facilities, sailing and walking. Numerous fishing clubs and access result in it being a heavily fished river. There is a high level of public access around Lechlade including gardens, pubs, the Riverside Country Park and footpaths. Flora identified from a walk over assessment of in Spring 2014 (1) Margin species - Reed Sweet-grass, Fools Water Cress, Common Reed, Lesser pond-sedge, Water mint, Meadow Sweet, Butterbur, Water Forget-me-not, Marsh Marigold and Flag Iris. Bank vegetation - nettles, Great willowherb, and Common comfrey. Aquatic vegetation - some Water-starwort. Thick stands of Himalayan balsam is a major problem on the Coln through Kempford and Lechlade parishes, excluding native vegetation and exposing soil to erosion. Fauna identified from a walk over assessment of in Spring 2014 (1) Signal crayfish are present in high numbers on the River Coln, undermining banks. Known to have a range of fish species including stocked Brown trout Typical species of hedgerows and woodland birds (including song thrush) and riparian birds. Reed bunting, reed warbler sighted, and Kingfishers are known in the area. Signs of otter and water vole in Fairford to Lechlade section of the Coln, work has been undertaken by Cotswold Water Park and Gloucestershire Wildlife Trust on conservation and habitat improvement. Main conclusions from Parish WILD reports (1) The River Coln through Fairford to the Thames is of significant ecological value despite the modification and the detrimental impact some river uses and management of trees. The ecology of the river habitat could be improved but requires significant landowner co-operation. Identified issues Flood risk; Fairford is in flood zone 3 due to its location (1 in 100 or greater chance each year). There is no risk to Kempsford or the village of Whelford. There is relatively low-level risk of flooding to the town of Lechlade however, parish land is in Flood Zones 2 and 3. The invasive signal crayfish and mimalayan balsam are both established in this waterbody. WILD Project, Rivers Management Plans for Fairford Parish, Kempsford Parish and Lechlade Parish (May 2016) Water Framework Directive For 2016 the WFD overall status ‘Poor’ for ecological elements – Fish (poor), macrophytes and phytobenthos (moderate) owing to physical modifications and land drainage (probably due to changes in monitoring points and updated data). In 2013 the WFD status for the Coln to Leach waterbody was ‘Good’. It is worth noting pre-2013 Coln (source to Thames) was one water body 29990. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039029992 Click here to go back to the main waterbodies information page
Coln (source to Coln Rogers) - GB106039029991 Catchment area 89.9km2, length 27.1km. Not designated artificial or heavily modified. Expand (nb previously part of a single waterbody: Coln (source to Thames) 29990) Catchment area 89.9km2, length 27.1km. Not designated artificial or heavily modified. Waterbody description The River Coln is spring fed, rising north of Brockhampton, flows in a south-easterly direction to join the Thames at Fairford (passing through villages of Withington, Fossebridge, Coln Rogers, Winson, Abington, Bibury and Quenington). The underlying geology is limestone and the river has a gravel base. Stretches of the river have been modified, there are on-line lakes and ponds, mill buildings and a trout farm. Point source pollution from wastewater treatment works at Andoversford, Withington, Bibury and Fairford. Land use and designations The waterbody has some steep slopes with extensive woodland particularly to the west of Brockhampton (new plantations) and in the valleys around Chedworth (ancient woodland). The farmland is mixed; principally permanent grassland but with significant areas of cultivated land. It is crossed by dismantled railway, major roads (including the A429 and A40) and Gloucestershire Way, Monarchs Way and Macmillan Way public footpaths. Flora and fauna Conclusions and issues Water Framework Directive In 2013 the WFD status was Good, by 2015 this had dropped to Moderate for the biological quality element macrophytes, due to physical modifications, and dissolved oxygen. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039029992 Click here to go back to the main waterbodies information page
Cotswold Water Park Lake 12 - GB30641559 Catchment area 0.16km2, lake surface area 12.165 ha, mean depth 2.47m, artificial lake. Expand Catchment area 0.16km2, lake surface area 12.165 ha, mean depth 2.47m, artificial lake. Waterbody description Part of the South Cerney lake development alongside the River Churn. Land use and designations Recreational lake owned by the South Cerney Outdoor Centre (https://www.southcerneyoutdoor.co.uk/) and used for water sports such as sailing and kayaking. Flora and Fauna Conclusions and issues Water Framework Directive WFD 2016 overall status was Moderate (owing to the biological element macrophytes and phytobenthos due to physical modification, land drainage and probable invasive non-native species). http://environment.data.gov.uk/catchment-planning/WaterBody/GB30641559 Click here to go back to the main waterbodies information page
Daglingworth Stream (source to Churn) - GB106039029770 Catchment area 22.4km2, length 11.1km. Not designated artificial or heavily modified. Expand Catchment area 22.4km2, length 11.1km. Not designated artificial or heavily modified. Waterbody description The Daglingworth stream begins north of Duntisbourne Abbots and winds itself between the agricultural hills of Duntisbourne Leer, Middle Duntisbourne and through Daglingworth. It flows into the north of Cirencester joining the Churn within the Bathurst Estate. The geology is mainly limestone formed approximately 166-168 million years, with occasional mudstone bedrock. There are opportunities to explore the geology to divert the flow away from sinkholes or use them in flood events. Currently flood meadows are used to slow the flow during these times. Land use and designations Flora and Fauna The stream itself is famed for its fish diversity and there is a known population of water voles in the lower reaches. Conclusions and issues Water Framework Directive *research is on-going to identify if sinkholes are the cause of water loss. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039029770 Click here to go back to the main waterbodies information page
Derry Brook - GB106039023620 Catchment area 15.8km2, length 8.6km. Not designated artificial or heavily modified. Expand Catchment area 15.8km2, length 8.6km. Not designated artificial or heavily modified. Waterbody description The Derry Brook rises south-west of Minety on rural land supplied largely by field drains. It initially flows in an easterly direction then heads north before passing the boundary of the Ashton Keynes and Leigh Parishes before joining Swill Brook. It has been consistently failing for both ecology and water quality (except 2013 Cycle 2), with the ecological status determined by macrophyte (moderate) and invertebrate data (poor). The brook has high levels of Phosphates and very low oxygen levels. The reasons for these failures are thought to be diffuse pollution and physical modification. The river habitat was surveyed in February 2015(1)) and found to run as a field boundary with significant scrub and is very shaded. Water quality looked poor with the water being very muddy and turbid. Where it was visible the base was a mix of fine gravels sand and silt. Surrounding farmland is largely semi-improved pasture for cattle and horses and some arable crops. A significant section is owned on alternate banks by the Wiltshire Wildlife Trust and Distillery Meadows Nature Reserve. The villages of Ashton Keynes and Minety are under no real risk of flooding. Flora Some section with Pendulous sedge growing. Fauna Few fish noted – No evidence of otter or water vole. The brook is likely to be too small to provide otter holt habitat although they might potentially use the brook to forage for food. Mallard ducks and species more typical of pasture, hedgerows and woodland were more commonly noted including Robin, Long-tailed tit, Blue tit, Great tit and Wood Pigeon. Main conclusions from the WILD parish reports Overall the brook is too small and shaded to have significant value as an aquatic habitat, but the surrounding scrub has value particularly for birds. In the summer it is likely that brook has very little water flow however it may provide habitat for smaller fish species. Any potential enhancement to the brook’s morphology is unlikely to be cost effective. Turbidity is worthy of further investigation if the water quality of the brook is to be improved Water with Integrated Local Delivery (WILD) Project, River Thames Management Plan, Ashton Keynes Parish, March 2016. Also, Leigh Parish (March 2016) Mintey Parish (February 2016) Water Framework Directive WFD 2016 (Cycle 2) Bad overall status (Bad for Invertebrates, Bad for Dissolved Oxygen and Ammonia, Poor Phosphates, Moderate for Macrophytes and Phytobenthos. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023620 Click here to go back to the main waterbodies information page
Dudgrove Brook - GB106039023110 Catchment area 1,294 ha, length 7.8km. Not designated artificial or heavily modified. Expand Catchment area 1,294 ha, length 7.8km. Not designated artificial or heavily modified. Waterbody description The Brook rises east of Meysey Hampton flowing south between Whelford and Kempsford. It joins the River Coln near Bowmoor Lake. The geology is mainly made up of Oxford clay which is a mudstone formed during the Jurassic Period 157 million years ago. Land use and designations Flora and Fauna Conclusions and issues Water Framework Directive WFD 2016 overall status was Moderate (owing to the biological element macrophytes and phytobenthos) and phosphate, however, there is no further data provided by the Environment Agency. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023110 Click here to go back to the main waterbodies information page
Elkstone Brook - GB106039029790 Catchment area 1,979 ha, length 4.6km. Not designated artificial or heavily modified. Expand Catchment area 1,979 ha, length 4.6km. Not designated artificial or heavily modified. Waterbody description The underlying geology is predominately limestone, with highly permeable Greater Oolite. This interesting geology means the upper reaches can be dry for some of the year (rainfall drains underground), with annual flows only found from Woodmancote through Bagendon to Baunton where it joins the River Churn. The catchment reaches to the village of Elkstone and Woodmancote in the east. Land use and designations Flora and Fauna Conclusions and issues Water Framework Directive WFD 2016 overall is Moderate with no reason given for failings. The waterbody scored Good for chemical and Moderate for its Ecological standards on the 2016 cycle 2. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039029790 Click here to go back to the main waterbodies information page
Haydon Wick Brook - GB106039023331 Catchment area 671 ha, length 4.3km. Heavily modified. Expand Catchment area 671 ha, length 4.3km. Heavily modified. Waterbody description Covering a small catchment in North Swindon, this Brook feeds into the River Ray on the west (near the Mouldon Hill Country Park). The waterbody is on a limestone / Oxford clay boundary. It flows through the heavily residential areas of Haydon Wick and Abbey Meads. To address flood risk, the area has been heavily modified with embankments and tree planting. Land use and designations Predominantly residential. Flora and Fauna Conclusions and issues Water Framework Directive WFD 2016 overall classification is Moderate, with phosphate being a predominant reason for failing http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023331 Click here to go back to the main waterbodies information page
Kemble Ditch at Kemble - GB106039023810 Catchment area 2,509 ha, length 1.3km. Not designated artificial or heavily modified. Expand Catchment area 2,509 ha, length 1.3km. Not designated artificial or heavily modified Waterbody description This waterbody is fed by a catchment surrounding Rodmarton (from Aston Down to Culkerton). The geology is a matrix of Oolite and Forest Marble limestone of high permeability, therefore much of the rainfall permeates through until it hits the clay layer beneath. The ditch therefore has regular low flow, and this is responsible for the poor dissolved oxygen levels. The ditch joins the Thames just after its source at Thameshead north of Kemble. Land use and designations Flora and Fauna Conclusions and issues Water Framework Directive WFD 2016 overall Moderate. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023810 Click here to go back to the main waterbodies information page
Key (source to Thames) GB106039023650 Catchment area 2,776 ha, length 10.5km. Not designated artificial or heavily modified. Expand Catchment area 2,776 ha, length 10.5km. Not designated artificial or heavily modified. Waterbody description The river rises at Braydon Forest near Purton and runs through Purton Stoke, joining the Thames on the southern bank near Cricklade. The river was crossed by the North Wilts Canal a few hundred yards south of Cricklade on the B4553 to Purton. In December 2000, as part of regeneration of the canal, rescue work was started on the River Key Aqueduct. In 2014 this waterbody was failing under Water Framework Directive for water quality due to high levels of phosphates and ammonia and for ecology due to invertebrates, phytobenthos and macrophytes. In 2016 the invertebrates and ammonia had recovered to good, however it is still failing with phosphates remain poor. The confirmed and suspected reasons for this are largely due to sewage discharge a point source of pollution with some additional contribution from agricultural sources (diffuse pollution) (1) WILD Project, Rivers Management Plan, Cricklade Parish (October 2015) Land use and designations Flora and Fauna Water Framework Directive WFD 2016 (Cycle 2) moderate overall status, failing due to phosphates remaining Poor (dissolved oxygen and macrophytes and phytobenthos moderate) http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023650 Click here to go back to the main waterbodies information page
Lenta Brook, East of Swindon - GB106039022870 Catchment area 1,559 ha, length 6.8km. Not designated artificial or heavily modified. Expand Catchment area 1,559 ha, length 6.8km. Not designated artificial or heavily modified. Waterbody description The Book arises at Bishopstone gathering water from the steep hills of the Wanboroughs and Hinton Parva to the west. The river slowly winds north west through agricultural fields towards the A420 where it joins the River Cole at Acorn Bridge. The Lenta Brook crosses a band of mudstone known as the Gault Formation, before reaching the clay of East Swindon. Land use and designations Flora and Fauna Conclusions and issues Water Framework Directive WFD 2016 overall classified this waterbody as Poor, with the river having poor biological quality elements. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039022870 Click here to go back to the main waterbodies information page
Liden Brook, Swindon - GB106039022860 Catchment area 1,275 ha, length 8.1km. Not designated artificial or heavily modified. Expand Catchment area 1,275 ha, length 8.1km. Not designated artificial or heavily modified. Waterbody description Making up the upper section of the River Cole, the Liden Brook flow down the northern slopes of Ridgeway from the M4 at Medbourne towards Coate parallel to the A419. It remains east of Swindon, passing under the Wanborough Road by Redlands Airfield heading north to join the River Cole after Acorn Bridge. The geology transitions from Zigzag chalk (on Ridgeway) across the mudstone Gault Formation onto the characteristic Oxford clay to the east of Dorcan. Land use and designations Mainly agricultural. Flora and Fauna Water Framework Directive WFD 2016 overall is classified as Poor, failing for Macrophytes and Phytobenthos due to sewage discharge and poor nutrient management in the catchment. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039022860 Click here to go back to the main waterbodies information page
Lydiard Brook - GB106039023310 Catchment area 1,328 ha, length 5.7km. Not designated artificial or heavily modified. Expand Catchment area 1,328 ha, length 5.7km. Not designated artificial or heavily modified. Waterbody description The Lydiard Brook rises in Greatfield, collecting run-off from Lydiard Millicent and the M4 at Royal Wootton Bassett. This waterbody encompasses the recreational area of Lydiard Park. The geology is mainly limestone, but the outer reaches to the west and north are Oxford clay. The Lydiard Brook flows towards West Swindon through the residential areas of Roughmoor and Peatmoor Wood before joining the River Ray north of Sparcells. Land use and designations Flora and Fauna Conclusions and issues Water Framework Directive http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023310 Click here to go back to the main waterbodies information page
Marston Meysey Brook - GB106039023860 Catchment area 2,199 ha, length 8.4km. Not designated artificial or heavily modified. Expand Catchment area 2,199 ha, length 8.4km. Not designated artificial or heavily modified. Waterbody description This narrow waterbody drains from Sunhill (to the east of Poulton village) southwards towards Meysey Hampton, passing under the A417. The brook flows around the village of Marston Mersey and joins the River Thames to the west of Castle Eton. The brook flows over Alluvium superficial deposits of clay, silt, sand and gravel, however the bedrock geology is predominantly limestone. Land use and designations Agriculture is the dominant land-use within this waterbody Flora and Fauna Conclusions and issues Water Framework Directive http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023860 Click here to go back to the main waterbodies information page
Ray (Wiltshire) (Lydiard brook to Thames) - GB106039023330 Catchment area 2,881 ha, length 10.3km. Not designated artificial or heavily modified. Expand Catchment area 2,881 ha, length 10.3km. Not designated artificial or heavily modified. Waterbody description The River Ray rises in Wiltshire, at Wroughton, and runs in a northerly direction through west Swindon, reaching the River Thames to the west of Cricklade. The river generally has good form in terms of meanders although some sections have been straightened but it is a very flashy river. The flashy nature is exacerbated by the increasing urbanisation of Swindon and the clay-based soils. In 2013 this waterbody was classified as moderate under Water Framework Directive for water quality due to high levels of phosphates and ammonia but it failed for ecology due to poor for phytobenthos and macrophytes. In 2014 it also failed on chemical water quality due to Tributyltin Compounds. Although chemical quality and ammonia has subsequently improved Phosphates remain poor in 2016. Land use and designations Flora and Fauna Conclusions and issues Water Framework Directive http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023330 Click here to go back to the main waterbodies information page
Ray (Wiltshire) source to Lydiard Brook - GB106039023320 Catchment area 34.3km2, length 11.5km. Not designated artificial or heavily modified. Expand Catchment area 34.3km2, length 11.5km. Not designated artificial or heavily modified. Waterbody description The waterbody is fed by the Vale of White Chalk catchment to the south, and it flows down into western Wroughton towards Mannington and Bridgemead in Swindon. It passes the residential areas of Kingshill, Even Swindon, Westmead and Rivermead, before joining the River Ray at Lydiard Brook. The stream flows directly past the Swindon Sewage Treatment Works at Blagrove, before feeding into Swindon Lagoons – a Wiltshire Wildlife Trust wetland consisting of 15 lagoons, reed beds, grassland and marshland (https://www.wiltshirewildlife.org/swindon-lagoons-swindon). The river is mostly on clay formations (with Alluvium superficial deposits) Land use and designations Flora and Fauna Conclusions and issues Water Framework Directive http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023320 Click here to go back to the main waterbodies information page
Share Ditch - GB106039023680 Catchment area 1,172 ha, length 5.5km. Not designated artificial or heavily modified. Expand Catchment area 1,172 ha, length 5.5km. Not designated artificial or heavily modified. Waterbody description Share Ditch carries water north from Broad Blunsdon, past Lushill and up to the Thames east of Castle Eton. INSERT GEOLOGY Land use and designations The ditch is surrounded by agriculture (mainly arable). Flora and Fauna Conclusions and issues This water course has been affected by sewerage discharge and the causes need addressing. Water Framework Directive http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023680 Click here to go back to the main waterbodies information page
South Marston Brook - GB106039022910 Catchment area 1,231 ha, length 5.1km. Not designated artificial or heavily modified. Expand Catchment area 1,231 ha, length 5.1km. Not designated artificial or heavily modified. Waterbody description WFD 2016 overall was Moderate status owing to bad phosphate from suspected transport drainage and sewage discharge, both of which are affecting the Macrophytes and Phytobenthos levels. The South Marsden Brook waterbody encompasses north-east Swindon from Groundwell, Stratton St Margaret to Nightingale Wood, including a substantial strip of the A419. The Brook itself runs to the south-east, from South Marsden Industrial estate, towards Burton Grove through mainly agriculture to Nightingale Wood where it joins the River Cole at Acorn End. The riverbed geology is predominantly sandstone, passing intermittent layers of clay. Land use and designations Flora and Fauna Conclusions and issues Water Framework Directive http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039022910 Click here to go back to the main waterbodies information page
Swill Brook (source to Ashton Keynes) - GB106039023700 Catchment area 6,867 ha, length 14.9km. Not designated artificial or heavily modified. Expand Catchment area 6,867 ha, length 14.9km. Not designated artificial or heavily modified. Waterbody description The Swill Brook is spring fed from land to the north and west of Crudwell. It generally flows in an easterly direction through the parishes of Oaksey, Minety, Somerford Keynes, Ashton Keynes and Leigh before reaching the River Thames. The poor ecological status from 2010 to 2013 was probably due to natural low flows, signal crayfish and physical modification. A river habitat survey was conducted in October 2013 (1) as part of the WILD project. The channel has been subject to extensive dredging in the past and low summer flows are exacerbated by the widened channel and embankments. The ecology is also constrained by over-shading on the banks which inhibits the natural regeneration to the original size. The extensive shading has encouraged the undercutting and slow destabilising of the southern bank in some areas in the Minety and Somerford Keynes parishes. The land either side of the brook is largely agricultural (semi improved sheep pasture and arable) with some angling and minerals businesses and holiday homes and the Wiltshire Wildlife Trust Nature Reserve/SAC that is Clattinger Farm. There is no significant buffer zone however it is protected from the livestock. Surrounding land regularly floods and although there is limited risk to villages or urban areas there are some individual houses and farms at high risk of flooding. Flora Species noted in autumn included species notes include Branched Bur-reed, Purple-loosestrife, Reed Sweet Grass, Reed Canary Grass, Jointed Rush Juncus articulates, Bulbous Rush, Yellow water-lily, Marsh Woundwort, Hemlock Water-dropwort, Pink Water Speedwell, Bogbean and Marsh pennywort. Fauna Grass snake observed. Fish noted during low water levels included Dace, Minnow and odd Perch and Bullhead. There were signs of Otter along the entire river and Water Vole where shading was reduced. Riparian habitat birds have been recorded (such as Kingfisher, Grey wagtail, Grey Heron, Mallard, Cetti's Warbler and Willow Warbler) and species more typical of pasture, hedgerows and woodland including, Wrens, Chiffchaffs, Song Thrush , Blackcap, Lesser Whitethroat Bullfinch Goldcrest, Robin, Dunnock, Blackbird, Song Thrush, Blue Tit, Great Tit, Long-tailed Tit, Chaffinch, Greenfinch, Goldfinch Sparrowhawk, Starling, Jackdaw, Carrion Crow, Magpie and Rook. Main conclusions Overall the Swill Brook through Oaksey, Ashton Keynes and Leigh parishes is of significant ecological value for its linear scrub & pond habitat, although the value of these habitats is limited by the severe low flows during the summer. The annual drying up of the channel means the river will only ever be suitable to species able to cope with the frequently dry conditions. This lack of water during the summer and early autumn means that the river is unlikely to reach good ecological status for fish for many years without significant restoration. Oaksey (March 2016) Ashton Keynes Parish, March 2016. Leigh Parish (March 2016), Mintey Parish (February 2016), Somerford Keynes (January 2016) Water Framework Directive 2016 Cycle 2 overall status now Moderate, including a Bad classification for Dissolved Oxygen (previously bad). http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023700 Click here to go back to the main waterbodies information page
Thames (Churn to Coln) - GB106039022990 Catchment area 36.8km2, length 22.2km. Not designated artificial or heavily modified. Expand Catchment area 36.8km2, length 22.2km. Not designated artificial or heavily modified. Waterbody description Since 2013 this waterbody has been failing for ecology under Water Framework Directive for water quality due to high levels of phosphates and phytobenthos, largely due to sewage discharge a point source of pollution with some additional contribution from agricultural sources (diffuse pollution). The waterbody flows north easterly direction from Cricklade, under the A419, through largely rural farming areas, skirting north of Castle Eaton, and south of Kempsford and joins the River Coln after Inglesham village. The Thames is fed by several other waterbodies along this stretch, increasing in discharge and flow. The riverbed geology remains clay for its length, with superficial deposits of silt and Land use and designations Land use towards Lechlade is cattle and sheep grazing and arable crops. The public have access along the Thames path follows large section of the course of the river from Cricklade to Castle Eaton. Flora and Fauna Conclusions and issues Water Framework Directive WFD 2016 (cycle 2) overall status ‘Moderate’, failing on phosphates (Poor), macrophytes and phytobenthos and dissolved oxygen (both Moderate). http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039022990 Click here to go back to the main waterbodies information page
Thames (Kemble to Waterhay Bridge) - GB106039023760 Catchment area 48.6km2, length 13.7km. Not designated artificial or heavily modified Expand Catchment area 48.6km2, length 13.7km. Not designated artificial or heavily modified. Waterbody Description The river is aquifer supplied in the Jurassic Limestone area of the southern Cotswolds. Its reactive flashy nature results in high seasonal flow variations. The top spring appears at Trewsbury Farm with additional springs adding to form an obvious river in woodland within the Kemble Parish. There is a gauging station after the village of Ewan. It flows through open pasture becoming progressively more shaded in a largely uniform channel. There are modified sections through the parishes of Kemble, Pool Keynes and Somerford Keynes where the channel splits and the original channel has been straightened, reducing the length and capacity. The bulk of water flows through a mill leat channel, modified since 1980 to become straight and uniform, above the lowest slope point to supply several mills. Along with seasonal drying, the modifications have further reduced the natural flow levels and the ecological value. There are some natural meandering sections and woodland through Neigh Bridge Country Park. In Ashton Keynes, the river runs along the high street with sharp turns. There has been extensive channel modification with straightening, enlargement, and embankments to prevent flooding. Several small bridges cross the channel here and small weirs hold water at low flows. The river flows into the Leigh Parish joining Swill Brook at Waterhay bridge, becoming more permanent and flowing on towards Cricklade. Land use and designations Land use through Kemble and Pool Keynes parishes is largely semi-improved pasture with some woodland and bankside hedgerows. The land is owned by Bathurst Estate, livestock farmers and small holdings. Public access includes the Thames path (184 miles source to Woolwich) and Sustrans Cycle route. The Thames and Severn Way canal runs through the catchment and over the river and the dismantled railway also crosses the river by Kemble. Around Ashton Keynes gravel pits have been converted to recreational lakes many of which are surrounded by second homes. The Neigh Bridge Country park is managed by Cotswold Water Park Trust and land is managed for general amenity at the Lower Mills Estate holiday complex. There is no significant flood risk for Kemble, Ewan and Pool Keynes. Somerford Keynes is in the floodplain, and a flood alleviation scheme, with various embankments, channel realignment and a floodwall, was constructed in the late 1990’s. Ashton Keynes is also in the floodplain; a channel diverts some water away from the village to a gravel pit and surrounding properties are at risk from surface water flooding. A weir upstream of Ashton Keynes also diverts some water to Swill Brook. Flora Emergent vegetation at the source to Somerford Keynes, included Fool’s water Cress, Lesser water-parsnip and Water Crowfoot. In Ashton Keynes also Branched Bur-reed, Bulrush, Reed Canary Grass, Reed Sweet Grass, Water-starwort, Common Club-rush (Bulrush), Water Plantain, Branched Bur-reed, Tufted Hair Grass, Water forget-me-not, Watermint and Meadowsweet. Fauna From source to Somerford Keynes water levels are too low to provide habitat for significant fish. The Thames is known to have a reasonable fish species range of largely coarse fish including chub, dace, perch, roach, minnow, bullhead, pike and occasional trout particularly downstream of Ashton Keynes. Signs of otter and water vole were recorded throughout the Pool Keynes to Ashton Keynes stretches. The following bird species were recorded: Kingfisher, grey wagtail, dunnock and song thrush (red listed) species and typical hedgerow and pasture birds and some riparian species such as pied wagtail, heron, and mallard. Main conclusions Overall the Thames through Kemble Pool Keynes and Somerford Keynes parishes is of significant ecological value but more for its linear scrub & tree habitat temporal habitat rather than a typical river habitat. There is also an important linear pond habitat in Ashton Keynes. The annual drying up of the channel above Ashton Keynes means this section of river will only ever be suitable to species able to cope with the frequently dry conditions such as sticklebacks or micro-crustacea. Water with Integrated Local Delivery (WILD) Project, River Thames Management Plans Kemble Parish (December 2015) Pool Keynes Parish, (February 2016) Somerford Keynes Parish (January 2016) Ashton Keynes Parish (March 2016), Leigh Parish (March 2016) In Cycle 1 the waterbody failed for ecology under fish from 2009 and dissolved oxygen levels in 2014. due to naturally low flows, poor morphology, urban modifications, and presence of signal crayfish. It was however reclassified as good in 2015. In 2016 Cycle 2 it was failing again for ecology due to poor dissolved oxygen status. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023760 Click here to go back to the main waterbodies information page
Thames (Waterhaybridge to Cricklade) and Chelworth Brook - GB106039022960 Catchment area 1,089 ha, length 6.6km. Not designated artificial or heavily modified. Expand Catchment area 1,089 ha, length 6.6km. Not designated artificial or heavily modified. Waterbody description From Waterhay the river flows in a north easterly direction passing the edge of Cleveland Lakes Nature Reserve and Hailstone Hill before turning sharply and continuing in a south easterly direction under the Wilts & Berk Canal past North Meadow National Nature Reserve (Speical Area of Conservation). It then skirts past the northern edge of Cricklade before passing under the A419 road. The landowners and tenants next to the river include quarry operators, Natural England, farmers, a livery yard, private residents, the Town Council and Thames Water. Other interested groups include the Upper Thames Protections Society and the Cricklade Court Leet. North Meadow is a part of the North Meadow and Clattinger Farm Special Area of Conservation and is designated for its very important lowland haymeadow plant community (including the nationally important population of Snakeshead Fritillary. The River Churn (Baunton to Cricklade waterbody) runs down the northern edge and this waterbody along the southern edge and the plant community is very dependent on both the hydrological regime between the rivers and the long-term management of hay cutting and autumn/winter grazing. The bank is damaged in places by cattle accessing the river and where fenced there is little buffer. Poaching is a major source of sediment pollution in the river. Around Cricklade the public who also have access to the watercourse and this has caused some damage to banks in places (a lesser cause of sediment pollution). There is a relatively high risk of flooding due to the low level of the land and natural floodplain, but the town of Cricklade itself is at low risk. Flora The river has the common flora assemblage (see below) with no species of major significance noted. Species included Branched Bur-reed, Bulrush, Fools water-cress, Reed Canary Grass, Reed Sweet Grass, Water-starwort, Common Club-rush (Bulrush), Water Plantain, Branched Bur-reed, Tufted Hair Grass, Water forget-me-not, Water mint and Meadow sweet. Fauna The Thames is known to have a reasonable fish species range of largely coarse fish including Chub, Dace, Perch, Roach, Minnow, Bullhead and Pike and occasional Trout particularly downstream of Ashton Keynes. Common coarse fish were present around Cricklade but it is likely that brown trout would find the river too sluggish and silty most of the year. Signal crayfish are known to be present. In a September 2014 survey in the Leigh parish (1) Otter signs were present along quieter areas and water vole signs were also noted, including very high densities at Waterhay Farm. The River Thames was surveyed for Water Vole by the Cotswold Water Park Trust in October 2015 and there were signs and observations between North Meadow and Cricklade. Bird species more typical of hedgerows and woodland were noted and Little Egret and Kingfisher (Amber listed species) and Song Thrush (red listed species) in the Leigh parish. Main conclusions of the WILD parish report Overall the rivers through Cricklade parish are of significant ecological value but the water quality and river habitat has been degraded due to bank damage and sediment inflows. The river and the surrounding land would need significant works to improve both water quality and habitat of the river and bring it up to good ecological status. WILD Project, Rivers Management Plan, Cricklade Parish (October 2015), Leigh Parish (March 2016) From 2009 to 2013 (Cycle 1) this waterbody was classified as poor under Water Framework Directive for ecology as the fish abundance and species range was found to be poor. The reasons for this failure were known or suspected to be over-predation by signal crayfish, natural low flows, land drainage and physical modification. It achieved Good status in under Cycle 2 in 2013 and 2015. Water Framework Directive 2016 (cycle 2) overall status Moderate (for macrophytes and phytobenthos and dissolved oxygen) http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039022960 Click here to go back to the main waterbodies information page
Thornhill Ditch and tributaries at Cotswold Water Park - GB106039029760 Catchment area 26.1km2, length 3.4km. Not designated artificial or heavily modified. Expand Catchment area 26.1km2, length 3.4km. Not designated artificial or heavily modified. Waterbody description WFD 2016 overall classified as Moderate, failing for dissolved oxygen and disrupted hydrological regime. The Ditch catchment extends from Hatherop (near Quenington), past Macaroni Woods, running west of Fairford. The upper reaches of the ditch lies dry for some of the year, with annual flow only found from the A417 to the lakes at Claydon. The flow confluences with the river Coln to the west of Lechlade before flowing into the River Thames. The soil is predominantly Cotswold brash and clay; this is a more impermeable layer which makes up a large proportion of the underlying geology. Land use and designations The Ditch is mainly surrounded by mixed farming using both organic and conventional techniques. Flora and Fauna Conclusions and issues Water Framework Directive http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039029760 Click here to go back to the main waterbodies information page
Tuckmill Brook and tributaries - GB106039022920 Catchment area 26.2km2, length 12km. Not designated artificial or heavily modified. Expand Catchment area 26.2km2, length 12km. Not designated artificial or heavily modified. Waterbody description WFD 2016 overall is Poor, failing for phosphate from probable sewage point source pollution. Rising in Idstone and Ashbury, two streams flow northerly towards Stainswick, winding through agricultural fields before passing the Great Western railway to reach east Shrivenham. It flows to the south of Watchfield and joins the river Cole at Bower Bridge. The geology is chalk in the upper reaches, flowing over bands of sandstone and clay before reaching limestone before its confluence. Land use and designations Flora and Fauna Conclusions and issues Water Framework Directive http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039022920 Click here to go back to the main waterbodies information page
Waterloo Ditch (East of Coleshill) - GB106039022950 Catchment area 9.9km2, length 5.3km. Not designated artificial or heavily modified. Expand Catchment area 9.9km2, length 5.3km. Not designated artificial or heavily modified. Waterbody description This small waterbody begins up at The Coxwells, flowing through arable fields towards Coleshill where it joins the River Cole at Bower Bridge. These upper sections of the Ditch are on sandstone/mudstone formations flowing onto Oxford clay in the lower reaches. Land use and designations Mixed arable and livestock farming. Flora and Fauna Conclusions and issues Water Framework Directive WFD 2016 overall classified as Moderate, failing for phosphate levels possibly from Agriculture. http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039022950 Click here to go back to the main waterbodies information page
Westrop Brook - GB106039023711 Catchment area 3.2km2, length 3.2km. Not designated artificial or heavily modified. Expand Catchment area 3.2km2, length 3.2km. Not designated artificial or heavily modified. Waterbody description WFD 2016 overall classified as Moderate due to failing for Ammonia and Phosphate from probable sewage discharge (point source). The catchment collects water from the residential areas of north Highworth, running north through arable field to join the Bydemill Brook at Upper Inglesham. This ditch makes up a proportion of the physical border between Oxfordshire and Wiltshire. The geology is all Oxford clay formation for its entire length. Land use and designations Flora and Fauna Conclusions and issues Water Framework Directive http://environment.data.gov.uk/catchment-planning/WaterBody/GB106039023711 Click here to go back to the main waterbodies information page