钱塘江流域水质发展趋势研究

通过对高锰酸盐指数和氨氮指标的分析，针对钱塘江流域近十年水质监测的调查，分析了钱塘江的水质现状；预测了流域水质的发展趋势。结果表明主干流的水质逐渐得到改善，但不同河段的水质变化较大,主干流水质好于支流、下游水质好于上游、远离城市河段好于市区河段。工业污染源与城市生活污染源得到治理，污染物排放量逐年降低，但农业面源污染负荷的控制相对较难，进展较缓慢。

Study on the development tendency of water quality in Qiantang River Basin

Water quality in current situation and water quality tendency in Qiantang River are analyzed through analysis for the permanganate index and ammonia-N index and investigation pointed to the water quality monitoring for ten years.The results indicated that the water quality in main river was better than tributaries,downstream was better than upstream and suburbh an river was better than urban river.Industrial contaminative sources and living contaminative sources have been harnessed,contaminating matter are reduced year by year.But the control of agricultural area source pollution was comparatively difficult and the development progress was slowly.