间歇式引水冲污对城市湖泊水质改善的研究

徐 丹,付 湘,谢亨旺,靳伟荣,秦嘉楠

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中国农村水利水电 ›› 2019 ›› (3) : 24-27.
水环境与水生态

间歇式引水冲污对城市湖泊水质改善的研究

  • 徐丹1,付湘2,谢亨旺3,靳伟荣3,秦嘉楠1
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Research on the Intermittent Water Diversion for Water Quality Improvement of Urban Lakes

  • XU Dan1,FU Xiang1,XIE Hen-wang2,JIN Wei-rong2,QIN Jia-nan1
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摘要

针对连续式引水冲污无法充分发挥清水的稀释和置换作用,而造成资源与经济严重浪费的问题,提出使用间歇式引水冲污来改善城市湖泊水质的理念。以南昌市艾溪湖为研究对象,使用MIKE 21二维水动力-水质耦合模型,模拟了两种引水冲污方式下的多种不同工况,并从使用水量与达标所需天数两方面进行了定量对比分析。结果表明:引水冲污所需的时间受引水流量大小的影响,并且随着引水流量的增大,两种冲污方法的时间差逐渐减小;在所有工况中,当达到相同的水质改善目标时,歇式引水冲污所用清水量均小于连续式引水冲污,能够显著地节约水资源。所提出的引水冲污理念及采用的研究方法不仅适用于本研究湖泊,而且可为其它城市湖泊的引水冲污提供参考。

Abstract

Water diversion in the past often focuses on the evaluation of water quality improvement in the water diversion process,in which a fixed flow rate is used for continuous water diversion. Clear water does not fully exert the function of dilution and displacement,which causes a certain amount of waste. In this study,a MIKE 21 hydrodynamic and water quality coupling model for the Aixi Lake in Nanchang City is built by using the intermittent water diversion method. The model is used to simulate water diversion under different conditions. The results show that the time required for water diversion is affected by the amount of water diversion. With the increase in water diversion,the time difference between the two methods decreases gradually. The total amount of clean water used by the method of intermittent diversion is less than the amount of water required for continuous water diversion,when the simulated water diversion plan reaches the same goal of improving water quality. This study can provide references for water diversion of lakes in other cities.

关键词

湖泊水质 / 间歇式 / 引水冲污 / MIKE 21

基金

江西省水利厅重大科技项目“赣抚平原灌区城市生态环 境供水优化调度研究”( KT201502)

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徐 丹,付 湘,谢亨旺,靳伟荣,秦嘉楠. 间歇式引水冲污对城市湖泊水质改善的研究[J].中国农村水利水电, 2019(3): 24-27
XU Dan,FU Xiang,XIE Hen-wang,JIN Wei-rong,QIN Jia-nan. Research on the Intermittent Water Diversion for Water Quality Improvement of Urban Lakes[J].China Rural Water and Hydropower, 2019(3): 24-27

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