Post-works assessment of the STREAM restoration project sites at Fovant (R. Nadder) (STREAM07)

The majority of the perennial River Avon catchment and part of one of the winterbournes (River Till) in Hampshire is designated as a Special Area of Conservation (SAC). The River Avon is one of the UK’s most bio diverse, with over 180 species of aquatic plants, 37 species of fish and a wide range of aquatic invertebrates. The headwaters of the main river are a network of clay streams fed by chalk springs. These converge to form a chalk river, which is then joined by the main tributaries around Salisbury developing into a large calcareous river. It then flows over more acid sands and clay as it passes the New Forest and the Dorset Heaths. The SAC also includes the Dockens Water, a largely unmodified acid stream draining New Forest heathlands.