EFDC模型在城市景观水体生态补水工程设计中的应用——以昆明市翠湖为例
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摘要
景观水体是城市人居环境的重要组成部分,但由于水体流动性差,水质难以保证,常需要环境水的补充。文章以昆明市翠湖为例,基于环境流动动力学模型(Environmental Fluid Dynamic Code,EFDC),模拟分析补水工程不同设计条件下的水动力情况变化,以辅助补水工程设计。结果表明翠湖补水工程适宜的补水量为30 000 m~3/d,进一步增大补水量对翠湖水动力改善效果不明显;结合水质零维模型,进一步明确了该补水工程适宜补水水源为牛栏江水。
Landscape water is an important part of urban living environment.However,water quality deterioration of landscape water is a common problem because of their insufficient water mobility,and it is often necessary to conduct ecological water supplement projects to guarantee good water quality of landscape water.This paper introduces a case study of the Greenlake in Kunming,in which Environmental Fluid Dynamic Code(EFDC) model is applied to assist water supplement project design.The results show that increased water supply leads to better water exchange,but the optimal amount of exogenous water supply for the Greenlake is 30 000 m~3/d.The effect of water supplement on the water quality of the Greenlake is not obvious when the amount of water supplied increases.Combined with zero-dimensional water quality model,it is found out that Niulan River water is more favorable water source for the Greenlake.
Landscape water is an important part of urban living environment.However,water quality deterioration of landscape water is a common problem because of their insufficient water mobility,and it is often necessary to conduct ecological water supplement projects to guarantee good water quality of landscape water.This paper introduces a case study of the Greenlake in Kunming,in which Environmental Fluid Dynamic Code(EFDC) model is applied to assist water supplement project design.The results show that increased water supply leads to better water exchange,but the optimal amount of exogenous water supply for the Greenlake is 30 000 m~3/d.The effect of water supplement on the water quality of the Greenlake is not obvious when the amount of water supplied increases.Combined with zero-dimensional water quality model,it is found out that Niulan River water is more favorable water source for the Greenlake.
引文
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[2]康孟新,田一梅,司彦杰,等.优化调度模型在城市景观水体中的应用研究[J].水力发电学报,2015,34(9):39-45.
[3]李畅,秦华鹏,张盈盈,等.不同季节中水回用于景观水体的藻类增长模拟[J].环境科学与技术,2011,34(5):47-51.
[4]魏俊,王银龙,陶如钧,等.杭州师范大学一期工程景观水体设计[J].环境工程,2015(s1):236-238.
[5]曹慧群,赵鑫.流域水环境数值模拟技术应用及研究展望[J].长江科学院院报,2015(6):20-24.
[6]尹雷,陈荣,王晓昌.基于污染物平衡分析的污水厂尾水补水城市内湖的优化运行研究——以昆明翠湖为例[J].环境科学学报,2015,35(2):449-455.
[7]章双双,潘杨,李一平,等.基于EFDC模型的尾水回用于城市景观水体优化计算[J].水资源保护,2017,33(6):74-78.
[8]HAMRIC J M.A three-dimensional Environmental Fluid Dynamics Computer Code:Theoretical and Computational Aspects[C]//The College of William and Mary,Virginia Institute of Marine Science,Williamsburg,Virginia.1992,Special Report 317,63.
[9]陈异晖.基于EFDC模型的滇池水质模拟[J].环境科学导刊,2005,24(4):28-30.
[10]刘夏明,李俊清,豆小敏,等.EFDC模型在河口水环境模拟中的应用及进展[J].环境科学与技术,2011(s1):136-140.
[11]张国涵,高原.牛栏江-滇池补水工程对滇池外海总磷和总氮含量的影响[J].环境科学导刊,2015(5):22-26.
[12]戚文,李一平,王莹,等.基于EFDC模型的天镜湖水动力优化调控方案研究[J].水电能源科学,2015(1):47-51.
[13]王冼民,翟淑华,张红举,等.基于水质改善目标的太湖适宜换水周期分析[J].湖泊科学,2017,29(1):9-21.
[14]LI Y,ACHARYA K,YU Z.Modeling impacts of Yangtze River water transfer on water ages in Lake Taihu,China[J].Ecological Engineering,2011,37(2):325-334.
[15]郭鹏程,轩晓博,闫大鹏,等.基于EFDC模型的人工湖水质保障最佳运行方式研究[J].水资源保护,2014,30(1):53-56.
[16]龚然,徐进,徐力刚,等.基于EFDC城市景观湖泊水动力模拟研究[J].环境工程,2015,33(04):58-62.
[17]LI Y,ACHARYA K,CHEN D,et al.Modeling water ages and thermal structure of Lake Mead under changing water levels[J].Lake & Reservoir Management,2010,26(4):258-272.
[18]逄勇,陆桂华.水环境容量计算理论及应用[M].北京:科学出版社,2010.