中文摘要：

矿山采掘、选冶生产活动中会产生大量的工业废水，直接或间接污染自然水系，破坏生态环境。水质的好坏直接关系着人民群众的健康，同时也关系着国家整体环境的可持续利用。以贵州某乡镇有色金属矿区为研究对象，采用支付意愿法对水质的维护与改善进行经济价值评估。

英文摘要：

In the process of mining and smelting, a large amount of waste water is produced. The waste affects the environment directly or indirectly.The water quality is related to people＇s health and environment. This paper evaluates the economics value of water maintenance by willingness to pay based on the study of the nonferrous metal mine in Guizhou township