The Feature Of Water Environment Evolvement Of The Dawen River Basin And The Appraisement Of Its Influence To The East Route Of The South-To-North Water Transfer Project

The water environment of the Dawen River Basin has been degenerating for a long timebecause of people's activity. Along with the building of the East Route of the South-to-NorthWater Transfer Project,the problem of the water environment of the Dawen River Basinbecomes more and more serious. We have studied and summarized the space-time evolutionlaw of hydrodynamic environment and hydrochemical environment of atmosphericwater,surface water,groundwater of the past decades of years and posted its cause of formation;pointed out the water environment as a whole tend to deterioration or exacerbation. We haveevaluated water quality classifications by using the grey correlation method andhydrochemical types by using Shukaliefu Method on water samples in the drought period andhigh flow period in 2005. In this foundation we have studied the current water quality in the DawenRiver Basin. The results point out that the quality of atmospheric water is still permissible but thequalities of surface water, groundwater are unoptimistic, even that fracture water has been badlycontaminated. We have studied systematically the Dawen River Basin water environment'sinfluence to Dongping Lake from two aspects of the water volume, the water quality,moreover explained the Dawen River Basin water environment's influence to the East Routeof the South-to-North Water Transfer Project. We must enable the Dongping Lake waterquality in 2007 to achieve "Surface Water Environment Quality Standard"III's request, theduty is very arduous. We have pointed out the problems of the Dawen River Basin waterenvironment and proposed the corresponding countermeasure and suggestion.