Rupert Cavendish Skyring Walters FGS (21 July 1888 – 19 February 1980) was a New Zealand-born British civil engineer, geologist and author, specialising in water supply. He is known for his work on the dams at British reservoirs including Sutton Bingham, Lamaload, Weir Wood, Drift and Stithians. He spent much of his career at Herbert Lapworth Partners (1932–67) in London. His books were The Ancient Wells, Springs, and Holy Wells of Gloucestershire (1928), The Nation's Water Supply (1936) and Dam Geology (1962), and he also published on English hydrogeology and the history of engineering in antiquity. He was the president of the Institution of Water Engineers (1951–52), and an elected fellow of the Geological Society of London and Institution of Civil Engineers.