Application WASP model on validation of reservoir-drinking water source protection areas delineation

Applied the OTOXI module and EUTRO module of WASP7.2 model to carrying out forecast analysis on attenuation condition of the main water quality control factors within second-level protection area which delineated by experience value, took the reality water volume of 2007 and forecast water volume of 2010, 2020 as the validating condition, demonstrated the rationality of the second-level protection area which delineated by experience value method. The results indicated that the second-level protection area could satisfy industry and life water request in 2007 and 2010, and could also satisfy the request of living in 2020, the protection area delineation has been proved reasonable. Further obtained the allowable maximum taking water volume of the protection area is 145 million m³/a through the computation, it is suggested that the industry intake moves when water volume which taken from the first-level and second-level protection areas is bigger than the maximum volume, to ensuring the quality and stability of the intake drinking water.