摘要
为探究南水北调-引黄济青小清河子槽输水段引黄、引江多源调水方案下水质响应变化规律,寻求现行调水能力下的最佳水质配水方案,以溶解氧、高锰酸盐指数、化学需氧量(COD)、五日生化需氧量(BOD5)、氨氮、总氮、总磷、氟化物为研究指标,对输水期多源调水的水质优化方案进行研究。首先以调水期实测水质数据为基础,构建并率定了渠段MIKE11水动力-水质耦合模型。进而以冬青高速上游断面作为考核断面,对不同配水方案下的水质指标变化进行分析。最后通过水污染指数法对水质模拟结果进行评价并确定最优配水方案。结论如下:研究渠段总氮含量偏高,其余指标符合Ⅲ类水标准;水动力-水质耦合模型中流量效率系数Ens为0.86,决定系数R^(2)为0.88,水质模拟结果误差在30%以内,模型模拟效果良好;随长江水对调水贡献率的不断提升,汇水后的水体中氟化物、溶解氧、高锰酸盐指数呈上升趋势,COD呈先下降后上升趋势,其余指标呈下降趋势;在多种模拟情境下,考核断面(东青高速上游断面)处化学需氧量与五日生化需氧量对该断面水污染指数(WPI)起决定性作用,当长江水供水量占总供水量49%时(17.64 m^(3)/s),该断面WPI达最小值(51.17),此方案为最佳配水方案。
To explore the water quality response and the change rule of the South-to-North Water Transfer Project and the Project of Yellow River to Qingdao City in the water delivery section of the pilot trench of the Xiaoqing River under the multi-source water transfer scheme of the diversion of the Yellow River water and Yangtze River water,and to find the best water quality and water distribution scheme under the current water transfer capacity,this paper takes dissolved oxygen,permanganate index,COD,BOD5,ammonia nitrogen,total nitrogen,total phosphorus,and fluoride as research indexes and studies the water quality optimization scheme of multi-source water transfer during water delivery period,hoping to provide a theoretical basis for water transfer management in the research area.First of all,11 monitoring points were set to monitor the water quality during the water transfer period.The measured water quality data and the design materials of the research area were taken as the basic data,the MIKE11 hydrodynamic-water quality coupling model was constructed and calibrated from the flood diversion gate to the section of the lower check gate.Then,the upstream section of the Dongqing Expressway was taken as the assessment section,the flow rate of the lower check gate of 36m^(3)/s was taken as the control condition to set 99 kinds of water distribution scenarios,and the changes in water quality indexes in the simulation results under different water distribution schemes were summarized and analyzed.In the end,the water pollution index method was adopted to assess the water quality simulation results and the best water distribution scheme was determined.The conclusions are as follows:the total nitrogen content in the research canal section was relatively high,the other indexes met the class Ⅲ water standards,the dissolved oxygen,permanganate index,COD,and fluoride in the water source of the Yangtze River were relatively high,and the BOD5,ammonia nitrogen,total nitrogen,total phosphorus content in the water source of the Yellow River were relatively high.The efficiency coefficient Ens of the flow in the hydrodynamic-water quality coupling model was 0.86,the determination coefficient R^(2) was 0.88,the error of the water quality simulation results was within 30%,and the effect of the model simulation was good.With the constant improvement of the contribution rate of the Yangtze River water to the water transfer,the fluoride,dissolved oxygen,and permanganate indexes in the water after the catchment showed an upward trend,and the COD first decreased and then increased,the other indexes showed a downward trend.The contents of most pollutants had a linear relationship with the contribution rate of the Yangtze River water,the difference in water quality between the two water sources had a relatively great influence on the water quality of the catchment,and the water environment had a relatively small effect on the decomposition and diffusion of pollutants.In various simulation scenarios,the COD and BOD5 at the assessment section(the upstream section of the Dongqing Expressway)played a decisive role in the WPI of this section.When the water supply of the Yangtze River accounted for 49%of the total water supply(17.64 m^(3)/s),the WPI of this section reached the minimum value(51.17).Therefore,this scheme is the best water distribution scheme obtained by the research.
作者
胡玉超
李庆国
武玮
温静静
刘志峰
赵汝鹏
HU Yu-chao;LI Qing-guo;WU Wei;WEN Jing-jing;LIU Zhi-feng;ZHAO Ru-peng(School of Water Conservancy and Environment,University of Jinan,Jinan 250022,Shandong Province,China;SHUIFA Planning and Design Co.Ltd,Jinan 250100,Shandong Province,China;Haihe River,Huaihe River and Xiaoqinghe River Basin Water Conservancy Management and Service Center of Shandong Province,Jinan 250100,Shandong Province,China)
出处
《中国农村水利水电》
北大核心
2023年第3期86-93,共8页
China Rural Water and Hydropower
基金
国家自然科学基金项目(51909104)。
关键词
水资源
水质模型
MIKE11
多水源
配水方案
水污染指数
water resources
water quality model
MIKE11
multi-water source
water distribution scheme
WPI
