泥沙沉降对水库富营养化指标的影响

The influence of sediment subsiding on the index of the reservoir eutrophication

为监测成库后三峡库区重庆段富营养化的状况,通过泥沙沉降对水质影响静态模拟试验,研究了长江原水的泥沙沉降对水体中Chla、SD、TP、TN、浊度等指标的影响.结果表明,三峡成库后泥沙更易沉降,引起水体浊度降低、SD增大,这可能利于藻类的生长,导致Chla的质量浓度增加,同时,泥沙沉降也使水体的TN/TP增大,对富营养化的发生有抑制作用.

For predicting the occurrence of entroplication in Chongqing reach of Three Gorge Reservoir （TGR）, through the static simulation test of sediment subsiding quality, the influence suspended sands on water quality of sedment subsiding of original water of Yangtze River on the indexs is formed of Chla, SD, TP, TN, turbidity of the waters was studied. The sediment subsided much more easily after GBR formed inducing the decrease of waters turbidity increase of SD, this could be favorable to the growth of algae, leading to increase of Chla quality concentration; meanwhile sediment subsiding could also increase the TN/TP of waters, and bad restraint function on the occurrence of eutrophication.