JIANG Yan, MA Wei, PENG Qi-dong, LUO Hui-huang

Department of Water Environment, IWHR, Beijing 100038, China

Abstract: Based on field investigation and monitoring data, this paper studied the source of water pollution and river pollution load with a water pollution load evaluating model in the Yanqi River Basin. The paper also established a water quality model to analyze water environmental capacity that will be one of the constraint conditions of intensity and scale for water environment carrying capacity under all kinds of control methods of water pollution source. The results show that: the water pollution load of catering trade is 2%, that of natural village is 12%, that of breeding of fish field is 86%, which is the main water pollution source. This basin system is in the overload state since the water pollution load is much greater than water environmental capacity. It is necessary either to decrease water pollution emission in fish field or to increase the rate of wastewater treatment that will reduce the river pollution load. The various ecological restoration methods should be taken to improve the water environment carrying capacity and maintain the sustainable development of society and economy for the serious pollution reaches of the Yanqi River Basin.

Key words: Yanqi River Basin, river pollution load, water environment carrying capacity, reduction amount water pollution

Published in: Journal of China Institute of Water Resources and Hydropower Research (Vol. 11 No. 2, 2013)