曹娥江干流水质的时空变异

Study on Water Quality Spatio-temporal Variation in Main Stream of Cao-e River

通过对浙江省绍兴地区的曹娥江干流上7个取水断面的多次、多参数水质监测,从电导、pH值、水温、溶解氧(DO)、浊度、高锰酸钾指数、总氮(TN)以及总磷(TP)8项水质参数,分析了曹娥江干流水质的时空变异。结果表明:(1)悬浮颗粒态污染物对TN,尤其是对TP有明显的贡献作用;(2)在一定程度上,海潮对pH值和高锰酸钾指数有影响;(3)在一定程度上,降雨对水体中的TN有较明显的影响;(4)整体上曹娥江干流的水质属于 类或是劣于 类的水质。

The present study has been undertaken to measure the water quality parameters (Electric Conductivity, Turbidity, pH, Temperature, Dissolved Oxygen, COD_(Mn), Total Nitrogen-TN and Total Phosphorus-TP) in the main stream of Cao-e River. Water samples from 7 points along the main stream in 6 months (once per month) were analyzed spatial-temporally. The results reveal: (1) suspended pollutants are obviously contributing to TN, especially to TP;(2) in a certain extent, tides affect the values of pH and COD_(Mn);(3) in a way, rainfall has obvious effect on TN in the river;(4) on the whole, the water quality of the main stream in Cao-e River belongs to grade Ⅴ or worse.