南水北调西线工程水环境影响分析

南水北调西线工程调水后，引水坝址下游局部河段水量明显减少，但影响范围和程度十分有限。随着两岸环保力度的加大，排污量的减少，径流量减少对局部江段水质的不利影响，可得到控制。预估调水后下游水质不会发生类别变化。

Evaluation of the effect of the Project of Water Diversion from the South to the North via the Western Course on the Water Environment

Research results show that after the operation of the project of water diversion from the South to the North via the western course(the project called hereafter), the runoff in the local river reach below the diversion dam sites will see an apparent decreasing. But the affected scope and its extent remain very limited. With increasing strength of the environmental protection, less load of pollutants will be decreased and so the effect of the de creasing in the runoff on water quality will be accordingly mitigated and controlled. Also, it is estimated that after the operation of the project, the water quality will continue staying in the same catalog as before the oper ation of the project.