River Dunsop

{{Short description|River in Lancashire, United Kingdom}}

{{Use dmy dates|date=April 2022}}

File:River Dunsop - geograph.org.uk - 1324848.jpg ]]

The River Dunsop is a river in the Forest of Bowland in Northern England. It flows into the River Hodder at Dunsop Bridge.{{cite web|title=Dunsop|url=http://environment.data.gov.uk/catchment-planning/WaterBody/GB112071065360|website=Catchment Data Explorer|publisher=Environment Agency|access-date=25 November 2015}}

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. An aqueduct carrying water to Blackburn runs alongside.

The Dunsop drains a catchment approximately 9 km by 5 km,{{Cite journal |last1=Mottershead |first1=Derek |last2=Suggitt |first2=Steve |date=1992 |title=Spatial Variation in Stream Water Quality: A Scientific Approach |url=http://www.jstor.org/stable/23755912 |journal=Teaching Geography |volume=17 |issue=2 |pages=66–69 |jstor=23755912 }} which comprises the sub-catchment areas of the Brennand and Whitendale, and is classed as a fifth order catchment. The catchment is primarily Millstone Grit, but the tributaries run through older shale and limestone strata

On 8 August 1967 Dunsop Valley entered the UK Weather Records with the Highest 90-min total rainfall at 117 mm. The peak flow of the flood was deduced primarily from wrack mark evidence and roughness coefficients.{{Cite book |last=M. J. Lowing |first=M.J. |title=Flood studies conference |date=1975 |url=https://www.icevirtuallibrary.com/doi/full/10.1680/fsc1975.00148.0005 |pages=23–26|doi=10.1680/fsc1975.00148 |isbn=978-0-7277-4736-5 }} As of July 2006 this record remains.