The River Haddeo on Exmoor

Exmoor

Exmoor is an area of hilly open moorland in west Somerset and north Devon in South West England, named after the main river that flows out of the district, the River Exe. The moor has given its name to a National Park, which includes the Brendon Hills, the East Lyn Valley, the Vale of Porlock and ...

 in Somerset

Somerset

The ceremonial and non-metropolitan county of Somerset in South West England borders Bristol and Gloucestershire to the north, Wiltshire to the east, Dorset to the south-east, and Devon to the south-west. It is partly bounded to the north and west by the Bristol Channel and the estuary of the...

, England flows from the Wimbleball Lake

Wimbleball Lake

Wimbleball Lake on Exmoor in Somerset, England, is a water supply reservoir constructed in the 1970s and completed in 1979.The high dam is of concrete buttress construction and impounds the River Haddeo to provide a water storage capacity of some 21,000 megalitres over an area of . Aggregate for...

 to the River Exe

River Exe

The River Exe in England rises near the village of Simonsbath, on Exmoor in Somerset, near the Bristol Channel coast, but flows more or less directly due south, so that most of its length lies in Devon. It reaches the sea at a substantial ria, the Exe Estuary, on the south coast of Devon...

.

The valley of the river consists of three tributary valleys extending down from the surrounding farmland to merge with the River Haddeo in the south. The tributary valleys include the River Pulham, which passes the village of Brompton Regis

Brompton Regis

Brompton Regis is a village and civil parish in the West Somerset district of Somerset, England about north-east of Dulverton. It is situated on the River Haddeo in the Brendon Hills within the Exmoor National Park, close to Wimbleball Lake, a water supply reservoir constructed in the 1970s and...

 and
continues to Hartford where it joins the Haddeo.

In 2001 - 2002 South West Water

South West Water

South West Water provides drinking water and waste water services throughout Cornwall and Devon and in small areas of Dorset and Somerset. South West Water came into being in 1989 with the privatisation of the water industry...

 commissioned a detailed assessment of fish population, physical habitat, flow and water quality data within the River Haddeo, since it has been subject to regulated releases from Wimbleball Reservoir, to identify potential bottlenecks restricting the development of juvenile salmon

Salmon

Salmon is the common name for several species of fish in the family Salmonidae. Several other fish in the same family are called trout; the difference is often said to be that salmon migrate and trout are resident, but this distinction does not strictly hold true...

populations.