Gouthwaite Reservoir
Fountains Earth, United Kingdom
Gouthwaite Reservoir is in Nidderdale, North Yorkshire, England. It is one of many reservoirs in the area, others include Roundhill Reservoir and Angram Reservoir. Gouthwaite is a compensation reservoir for the River Nidd, i.e. it maintains the downstream flow of the river during periods of high and low rainfall.
Reservoir data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).