【摘要】 本研究基于1998-2012年海河流域水质数据,从流域角度上探讨流域地表水常规污染演变特征,分析了全流域不同水期排污特征。结果表明,整体上河段污染形势严峻,受污染河长比例保持在约60%至75%之间。劣Ⅴ类水以及优于Ⅲ类水河长总数则呈现轻微下降趋势。更多还原

【Abstract】 Based on the data of water quality from 1998 to 2012 in Haihe Basin,the conventional pollution variation characteristics of surface water in this basin were discussed from the whole basin aspect, and the pollution emission characteristics of the whole basin at different water periods are analyzed in this study. The wastewater discharges from different sources and in the three hydrologic seasons were also fully analyzed. Results showed that rivers in Haihe Basin were generally seriously polluted,and the length percent of polluted rivers was kept in the range from about 60% to 75%.The amount of rivers lengths with inferior classⅤwater and over class Ⅲ water decreased year by year.更多还原