摘要
长潭水库因取水口位置过低,每年6～9月原水中的铁、锰浓度常超过集中式生活饮用水地表水源地限值标准,大幅增加水厂的运行成本和影响出厂水质。为此,分析了长潭水库2012～2016年分层水质监测数据及其成因,并结合水厂的制水工艺合理确定长潭水库分层取水口高程。发现水温和溶解氧是导致原水铁、锰超标的主要因素,10m水深是长潭水库铁、锰和氨氮垂直浓度梯度的分界线。根据原水水温、溶解氧、pH值、铁、锰和氨氮对水厂运行和出水水质的影响,结合长潭水库多年逐日平均水位保证率统计成果,确定分层取水上层取水口底高程为26.05m,下层取水口底高程为16.05m,既能保证台州市引水工程尽可能多地取到优质原水,又能降低运行成本、保证特枯年份的取水。
Due to low water intake location of Changtan Reservoir, the concentration of iron and manganese in raw water often exceed the limit value of centralized drinking water source area from June to September every year, which substantially increases the operating costs and affected the effluent quality of water plant. By analyzing the stratified water quality monitoring data of Changtan Reservoir from 2012 to 2016 and its cause, the stratified intake elevations of the res- ervoir were reasonably determined with consideration of the water production technology of water plant. Water tempera- ture and dissolved oxygen are the main reason for causing iron and manganese to exceed the limit value of raw water, wa- ter depth of 10 m is the boundary of vertical concentration gradient of iron, manganese and ammonia in Changtan Reser- voir. According to the impact of water temperature, dissolved oxygen, pH, iron, manganese and nitrogen of raw water on the effluent quality and operation of water plant, 26.05 m of the upper intake elevation and 16.05 m of the bottom in- take elevation were determined by considering the guarantee rate of annual daily mean water level in Changtan Reservoir. It will not only ensure to get high quality raw water as much as possible, but also reduce operation cost and ensure water intake in extreme drought year by Taizhou water diversion project.
作者
蓝雪春
方远
邵繁盛
LAN Xue-chun;FANG Yuan;SHAO Fan-sheng(Zhejiang Design Institute of Water Conservancy and Hydro-Electric Power,Hangzhou 310002,China)
出处
《水电能源科学》
北大核心
2018年第11期104-106,111,共4页
Water Resources and Power
关键词
长潭水库
引水工程
分层取水
水质分层
Changtan Reservoir
water diversion project
stratified water intake
stratified water quality
