甘肃省黄河流域“十一五”期间河流水质变化趋势分析

摘要

By using the integrated pollution index and the rank correlation coefficient method ,a comprehensive a-nalysis of water quality was made in the Yellow River reaches of Gansu section during the eleventh five-year plan period. Results showed that the water quality was steady and the overall trend of surface water environment was getting better and better. The water qualityd during the period of "Eleventh Five-Year" plan has been significantly improved,but comprehensive management efforts are needed to further promote the water quality.%运用污染综合指数和秩相关系数法,对甘肃黄河流域“十一五”期间(2006～2010年)水质状况进行综合分析.结果表明,甘肃黄河流域河流水质持续稳定,地表水环境质量总体呈现好转趋势.“十一五”期间水质较“十五”末期有明显的好转,但仍需加大综合治理力度,进一步促进水环境质量持续改善.