Water abstraction and impounding—introduction Water is abstracted when surface water or groundwater is taken from any source of supply, and includes temporarily or permanently removing water from a source of supply, and transferring water from one source of supply to another. Source of supply includes: • inland waters (rivers, streams, springs, reservoirs, lakes, ponds and canals) apart from ‘discrete waters’, and • groundwater, including water contained in wells, boreholes and some excavations, except for water stored in sewers, pipes, reservoirs, tanks or other underground works ‘Discrete waters’ are waters which do not discharge into other inland waters within the meaning of WRA 1991, s 221. Under section 25(8) of the Water Resources Act 1991 (WRA 1991), ‘impounding works’ means any dam or other works in inland waters by which water may be impounded or diverted. This includes: • dams • weirs • fish passes • hydropower turbines • reservoir embankments • retaining walls, and • temporary diversion during construction work Water abstraction and impounding form a central part of the regulatory framework