引水方案对人工湖内换水率影响的数值模拟
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摘要
针对缺水城市人工湖富营养化问题,以引水口数量、位置和引水方式为研究要素,采用MIKE21软件对青海省海东市湟水河治理工程乐都主城段南侧人工湖10种引水方案的引水效果进行数值模拟,分析对比了不同引水方案下水体的换水率,以寻求最佳引水方案。结果表明:主引水口位置应设置在离出水口较远的地方;当引水流量一定时,相较于单一引水口补水方案,多引水口交错补水的方案引水效果较好,其平均换水率和最小换水率均有显著提高,水体流动情况较好,循环程度较高。
Aiming at the issue of eutrophication of artificial lakes in water-scarce cities, this study took the quantity, location and way of water diversion as the research elements and used MIKE21 software to perform numerical simulation of the water diversion effect on the south artificial lake in Ledu main city section of the Huangshui River Management Project in Haidong, Qinghai Province. It simulated 10 water diversion schemes and compared the water exchange rate of water body in the lake in order to identify the best water diversion scheme. The results show that the primary irrigating gate should be set in the location far away from the outlet. When the diversion flow is constant, the multi-diversion scheme with staggered water supply has better diversion effect than that of the single diversion scheme. The average water exchange rate and the minimum water exchange rate are both significantly improved. The water flow is better and the circulation degree is higher.
Aiming at the issue of eutrophication of artificial lakes in water-scarce cities, this study took the quantity, location and way of water diversion as the research elements and used MIKE21 software to perform numerical simulation of the water diversion effect on the south artificial lake in Ledu main city section of the Huangshui River Management Project in Haidong, Qinghai Province. It simulated 10 water diversion schemes and compared the water exchange rate of water body in the lake in order to identify the best water diversion scheme. The results show that the primary irrigating gate should be set in the location far away from the outlet. When the diversion flow is constant, the multi-diversion scheme with staggered water supply has better diversion effect than that of the single diversion scheme. The average water exchange rate and the minimum water exchange rate are both significantly improved. The water flow is better and the circulation degree is higher.
引文
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[2] JIA Y F,WANG S,ZHU T T.Validation of Three-Dimension Hydrodynamic Model for Flow at Bend[J].Advances in Hydro-Seience and Engineering,2004(6):1-9.
[3] 马骎,张庆河,苏东升,等.住宅小区人工湖流场数值模拟分析[J].水电能源科学,2015,33(4):89-92.
[4] 余成,任宪友,班璇,等.二维水质模型在武汉东湖引水工程中的应用[J].湖泊科学,2012,24(1):43-50.
[5] 郭鹏程,蔡明,闫大鹏.基于MIKE21模型的人工生态湖优化设计[J].人民黄河,2014,36(4):56-58.
[6] 康孟新.城市大型缓流景观水体循环和水质模拟[D].天津:天津大学,2011:11-13.
[7] 赵小利,李文奇,周怀东.水环境数学模型与人工湿地的模拟[J].南水北调与水利科技,2011,9(3):56-58.