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River Frome, Dorset




The River Frome ( Pronounced ) is a River in Dorset in the south of England . At 48 km long it is the major chalkstream in SW England. It Rises in the Dorset Downs at Evershot , passes through Maiden Newton , Dorchester , West Stafford and Woodsford . At Wareham it is joined by the River Piddle , also known as the River Trent, and from then on it is navigable for almost 8 miles of river Estuary , through Poole Harbour . The catchment area is 454 km&2 map , approximately one sixth of the county.

East of Dorchester the river runs through unresistant sands, clays and gravels, which would have originally been capped by Chalk which is still extant in the Dorset Downs to the north and Purbeck Hills to the south. The valley has wide flood plains and marshes and gave the name to the Durotriges , ''water dwellers'', the Celt ic tribe of Dorset. The river forms a wide, shallow Ria at its estuary, Poole Harbour.

The Romans built a 12-mile Aqueduct , starting at Littlewod Farm, Frampton, using a stream running from Compton Valence, to supply their new town of Dorchester. Some traces can still be seen at Bradford Peverill and on the Dorchester by-pass. It has been calculated that water would have reached Dorchester at the rate of 13 million gallons per day.

The Danes made frequent raids up the river. The town walls at Wareham were built in 876AD, possibly by Alfred The Great , to defend the town against this threat.

The Frome has suffered a dramatic decline in the run of Salmon in recent years. In 1988 over 4000 fish ran the river, by 2004 the run had fallen to 750 fish. This is partly due to obstacles at the Bindon Mill hatches and Louds Mill weir and partly to changed agricultural methods.

Prior to the end of the last Ice Age the Purbeck Hills were continuous with the Isle Of Wight and the Frome would have continued east through what is now Poole Harbour and Poole Bay, into The Solent , collecting the Stour , Beaulieu , Test and Itchen , before flowing into the Channel east of what is now the Isle of Wight.


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