Thornhill Ditch and tributaries at Cotswold Water Park - GB106039029760 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 Manage Cookie Preferences