It begins at the confluence of the Brennand River and Whitendale River, both of which rise high up in the surrounding moorland. It then flows through the steep-sided Dunsop Valley before meeting the Hodder.[1]Anaqueduct carrying water to Blackburn runs alongside.
The Dunsop drains a catchment approximately 9 km by 5 km,[2] which comprises the sub-catchment areas of the Brennand and Whitendale, and is classed as a fifth order catchment.[2] The catchment is primarily Millstone Grit, but the tributaries run through older shale and limestone strata[2]
On 8 August 1967 Dunsop Valley entered the UK Weather Records with the Highest 90-min totalrainfall at 117 mm. The peak flow of the flood was deduced primarily from wrack mark evidence and roughness coefficients.[3] As of July 2006 this record remains.
Media related to River Dunsop at Wikimedia Commons
