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钱塘江流域是浙江省最大的饮用水源,从千岛湖流经新安江,富春江至钱塘江,两岸共建有水厂18座,取水量约270万m3/d,夏季超过300万m3/d,其中,杭州市区有9座水厂取水总量超过200万m3/d,占80%以上,集中于流域下游取水。随着钱塘江流域经济的快速发展,钱塘江饮用水源不断遭受着污染,事关500多万人口的饮水安全,流域的饮用水水质风险值得关注。1主要风险来源根据钱塘江的水文特点,水质污染的来源主要为上游污染,风险依
The Qiantang River Basin is the largest source of drinking water in Zhejiang Province. It flows from Qiandao Lake through Xin’an River and Fuchun River to Qiantang River. There are 18 water plants built across the Taiwan Strait with a water intake of about 2.7 million m3 / d and more than 3 million m3 / d. Among them, there are 9 waterworks in Hangzhou City which have total water intake of more than 2 million m3 / d, accounting for more than 80%, focusing on water intake in the lower reaches of the basin. With the rapid economic development in the Qiantang River Basin, sources of drinking water in the Qiantang River continue to be polluted, which is related to the safety of drinking water for more than 5 million people and the risk of drinking water quality in the watershed deserves attention. 1 The main sources of risk According to the hydrological characteristics of the Qiantang River, the sources of water pollution are mainly upstream pollution and risk