【作者】 杨司嘉； 李珂；

【Author】 YANG Sijia;LI ke;Yellow River Engineering Consulting Co.Ltd.;Key Laboratory of Water Management and Water Security for Yellow River Basin, Ministry of Water Resources(under construction);Henan Engineering Research Center of Urban water Resources and Environment;

【机构】 黄河勘测规划设计研究院有限公司； 水利部黄河流域水治理与水安全重点实验室(筹)； 河南省城市水资源环境工程技术研究中心；

【摘要】 湿沉降是影响人工湖泊水质变化的一个重要的营养盐输入过程。以郑州蝶湖为例,基于MIKE21水动力水质模型研究了人工湖泊在仅存在湿沉降、坡面径流污染下的水质演变规律,并分析了基于水质目标的湖泊适宜换水时机问题。模型计算结果表明:五月中旬至十月为蝶湖水华爆发风险期,湖区经过换水后维持Ⅲ类水水质的时间为15-20天;十一月至次年四月,湖区经过换水后维持Ⅲ类水水质的时间为35-40天;为维持Ⅲ类水不少于300天的水质目标,蝶湖一年需换水七次,换水时机分别为二月、四月、八月、十二月月初及五月、七月、十月月中。更多还原

【Abstract】 Wet sedimentation is an important nutrient input process that affects the water quality of artificial lakes. Taking Die lake in ZhengZhou as an example, the hydrodynamic water quality model based on MIKE21 was used to study the water quality evolution rule of artificial lake only under the condition of wet sedimentation and slope runoff pollution,and to analyze the suitable time and cycle about water renewal of the lake based on water quality objectives. Model calculation results show that: Die lake water blooms outbreak risk period is from mid-May to October, after water renewal, the lake maintain Ⅲ class water quality for 15 to 20 days; at the November to April the following year, after water renewal, the lake maintain Ⅲ class water quality for 35 to 40 days; In order to maintain Ⅲ class water not less than 300 days, the Die lake need to change water seven times a year, change water time, respectively, in early of April, August and December and the mid of May, July, October.更多还原