ZHOU Na, JIA Yang-wen, HU Peng, YOU Jin-jun

State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research 100038, China

Abstract: The paper proposes a concept of the ratio of water function reaches under regulation of pollution load, which means the quantitative proportion of water function reach in which the total amount of pollution is less than its pollution capacity, for assistant the strictest water resources management system. According to the high water environment risk of cold area in freezeup period, which caused by declining self-purification capacity and high pollutant concentration of treated sewage, the paper build a calculation model of water function reach pollution capacity in freezeup period based on distributed hydrological model. Apply the concept and model to the Songhuajiang River basin, the paper do a research of united regulation of water quantity and quality in freezeup period. The result shows that under the optimal water quantity regulation proposal of intensive water-saving and water conservancy projects regulation, for achieve the aim of 90 % of the ratio of water function reaches under regulation of pollution load, all of the wastewater treatment plants in the Songhuajiang River basin should reach the discharge standard IB in freezeup period in the year of 2020, and the industrial waste water should reach the discharge standard II.

Key words: water function reach, pollution capacity, freezeup period, united regulation of water quantity and quality, Songhuajiang River

Published in: Journal of Hydraulic Engineering, Vol. 45, No. 5, 2014