The main causes for water pollution in the Three Gorges Reservoir Area were discussed . The key to water pollution prevention in the Three Gorges Reservoir Ar ea is to control and abate the production and discharge of pollutants from sources . The basic way to prevent water pollution is to fulfill scientific development view and complete three strategic transformations . In the reservoir bay and reaches that has been polluted ( for example : water bloom) , the pollution treatment should include measures of source control , end treatment and ecological restoration .