“十一五”江苏省地面水域水质污染特征分析

对"十一五"江苏省地面水域水质状况及时空分布特征进行了全面分析,结果表明,"十一五"期间,江苏省地表水水质总体处于轻度污染状态,河流水质呈现较为明显的有机污染特征,影响水质的主要污染物为石油类、氨氮、五日生化需氧量等;主要湖库氮、磷污染较为突出,湖库富营养化问题尚未得到有效控制。水质污染总体表现为枯水期>平水期>丰水期。受社会经济发展影响,地表水质呈现一定的区域流域差异,经济较发达地区水质污染也相对较重。总体来看,"十一五"期间由于加大了产业结构调整与污染防治力度,江苏省地面水域水质污染状况有所改善。

Analysis on Pollution Characteristics of Surface Water in Jiangsu Province during Eleventh Five -year Plan Period

Water quality and time - space distribution characteristics of surface water in Jiangsu Province during the eleventh five - year plan period are analyzed. The result shows that water quality of the surface water in Jiangsu Province belongs to light pollution. Water quality of rivers presents obvious organic pollution characteristic. The main pollutants are petroleum oils, ammonia nitrogen, BOD5 and so on. The pollution of nitrogen and phosphor in lakes is prominent and the eutrophication of lakes is not effectively controlled. Water pollution is more serious in dry period than in medium period and wet period. Affected by economic development, water quality in different areas has different characteristics. In general, due to the adjustment of industrial structure and pollution control measures, the quality of surface water in Jiangsu Province has been improved over the past five years.