The Study About The Impact For Groundwater Environmental Caused By The Second-stage Construction Of Datang Wushashan Power Plant In Zhejiang Province

This paper is based on key project of the environmental hydrogeologicalexploration in second phase project of wushashan power plant. Analyzing the possibleimpact on the groundwater environment in the construction process of Wushaå±±power plant，especially the the possible impact on the groundwater environmentcaused by ash field under runoff leaching operation.This paper aiming at the effects of fly ash on groundwater， usingmulti-disciplinary integrated water and environmental chemistry， soil chemistry，field sampling and hydrogeology situation survey，the groundwater resources in thestudy area， analysis of groundwater environmental quality was evaluated. totaldesigned soil permeability test， Marinating and leaching and other laboratoryexperiments. Through the dynamic and static simulation， getting the possible impactcaused by the construction of power plant in groundwater.different soil types anddifferent rainfall conditions. NO₂^-is the most possibly characteristic ions that maycause pollution. NO₂^-，when the the fly ash baptized solubilization longer， willpollute groundwater. Other ions also have an increasing trend， but still in the ClassIII of the water standard range. With the extension of the test time， it is found thatmost of the cumulative release for each ion according to a logarithmic law， i.e. firstincreased slowly after leveling off trend. In order to further determine the impact ongroundwater plant construction， the use of analytical method for gray-field regionwere simulated groundwater prediction， forecast results shows that with the amountof the deposited ash field and piling time increased and prolonged， the degree andextent of groundwater contamination will vary the increase， but less than themaximum influence distance100m， although the impact on the surroundinggroundwater， but the impact is small distances.This also indicates that these ion impact on the environment weak..