松花坝水库底泥疏浚对其水质影响分析研究

谷昌坝水库为松华坝水库的前置库，1993年拦截泥沙25821t、总磷21．4t、总氮45．88t，分别占入库总量的92．4％、83．3％和39．2％，且90％以上的磷吸附在泥沙及颗粒上迁移。1996年以来谷昌坝共清淤58．05万m^3，挖深7m-8m。1994年、1999年和2000年的监测数据比较表明，松华坝水库水质均为轻污染，没有进一步恶化。

Affecting analysis of the water quality by dredging bed mud of Songhuaba reservoir

Guchangba reservoir is the pre-reservoir of Songhuaba reservoir. The pre-reservoir blocks the mud and sand which was 25821 tons in total in 1993 to the reservoir. The mud and sand consisted of total phosphorus (21.4 tons), total nitrogen (45.88 tons). The three quantities are 92.4 percent, 83.3 percent and 39.2percent of the total quantities separately which may go into the reservoir. 90 percent of phosphorus is adsorbed by the mud and sand. Guchangba reservoir has been cleaned the 580,500m~3 of bed mud and deepened to 7-8 meters since 1996 and 2000 showed that the water quality of Songhuaba reservoir did not deteriorate further.