三峡库区重庆段大中型水库富营养化调查及评价

2005年对三峡库区重庆段的12座大中型水库进行了监测。结果表明,水库水体中的总氮、总磷含量都较高。12座水库TP含量范围为0.017-0.258 mg/L;TN含量范围为0.718-5.941 mg/L;CODMn含量范围为1.30-7.03 mg/L;透明度范围为0.48-2.00 m;Chla范围为3.286-52.300 mg/m3。调查水库都处于中营养到富营养之间。其中,重度富营养化水平的2座;中度富营养化水平的4座;轻度富营养化的4座;中营养水平的2座。

Investigation and Estimation of Eutrophication in Large and Medium-sized Reservoirs of the Three Gorges Reservoir in Chongqing

12 large and medium-sized reservoirs in the Three Gorges Reservoir in Chongqing were investigated.The results showed that the total nitrogen(TN) and the total phosphorus(TP) concentrations of all the reservoirs were high.The concentration of the TP,TN,CODMn,Secchi disk depth(SD) and chla varied from 0.017 to 0.258 mg/L,0.718 to 5.941 mg/L,1.30 to 7.03 mg/L,0.42 to 2.00 m and 3.286 to 52.300 mg/m3,respectively.According to the estimation standard commended by Environmental Monitoring Centre of China,all of the reservoirs were from mesotropher to eutrophication.Two reservoirs were hyper eutropher,four middle eutropher,four light eutropher and two in mesotropher level.