River Nene
…of 750,000. The Nene's main tributaries include the River Ise, Wootton Brook, Willow Brook, and Harper's Brook. At 105 miles (169 km) long, it is the tenth-longest river in the United Kingdom, and is tidal for 45 kilometres (28 mi) up to Dog-in-a-Doublet sluice, near Peterborough. The river forms the boundary between Cambridgeshire and…