不同调水方案对沙湖水动力及水质影响研究  

Influence of different water transfer schemes on the water dynamics and water quality of Shahu Lake

作　　者：徐志鹏 朱翔 侯俊[3] 汪金辉 苏欢欢 闵嵩傲 朱文 丁伟[6] 汪龙眠 XU Zhipeng;ZHU Xiang;HOU Jun;WANG Jinhui;SU Huanhuan;MIN Songao;ZHU Wen;DING Wei;WANG Longmian(Kunshan Water Conservancy Design Institute Co.,Ltd.,Suzhou 215300,China;Nanjing Institute of Environmental Sciences.Mee,Nanjing 210042,China;College of Environment,Hohai University,Nanjing 210098,China;School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Kunshan Bacheng Construction Bureau,Suzhou 215300,China;Design Institute of Hohai University,Nanjing 210098,China)

机构地区：[1]昆山市水利设计院有限公司,苏州215300 [2]生态环境部南京环境科学研究所,南京210042 [3]河海大学环境学院,南京210098 [4]上海交通大学环境科学与工程学院,上海200240 [5]昆山市巴城镇建设局,苏州215300 [6]河海大学设计院,南京210098

出　　处：《环境保护科学》2024年第2期94-102,共9页Environmental Protection Science

基　　金：宁夏回族自治区重点研发项目(2019BFG02028)。

摘　　要：由于地处降雨量少、蒸发量大的特殊地理环境,沙湖每年都需要调水引流以达到改善水质和维持总体水量的目的。因此调水水量及调水路线的选取对沙湖水质改善有关键的影响。文章基于环境流体力学模型(Environmental Fluid Dynamic Code,EFDC)模型构建了沙湖水动力-水质模型,模拟沙湖水动力、总氮和总磷的时空分布特征,发现与实际数值拟合度较高;并基于沙湖实际调水方案,设置四种调水方案,探究了不同调水方案对沙湖水动力及水质的影响。结果表明调水引流工程能有效加快沙湖水体流速同时降低总氮、总磷浓度,但也会造成沙湖水质波动。相较于减水方案,增水方案对提高沙湖水体流速和降低总氮、总磷浓度的效果更好;与八一渠入流相比,东干渠入流更利于提升沙湖水体流速和降低沙湖总氮、总磷浓度。总体而言,4种调水方案中方案一(增水方案)是改善沙湖水动力条件和水质的最佳方案。Due to the special geographical location with low rainfall and large evaporation,Shahu Lake requires annual water transfers and diversions to improve water quality and maintain overall water quantity.Therefore,Therefore,the selection of water transfer quantity and route has a key influence on the improvement of water quality in Shahu Lake.Based on the Environmental Fluid Dynamic Code(EFDC)model,a hydrodynamic and water quality model was constructed to simulate the spatial and temporal distribution characteristics of the water dynamics,total nitrogen and total phosphorus.Based on the actual water transfer scheme of the Shahu lake,4 water transfer schemes were set up,and the influence of different water transfer schemes on the water power and water quality of the sand lake was explored.The results showed that the water diversion and drainage project could accelerate the flow velocity and reduce the concentration of total nitrogen and total phosphorus,but it would also cause the fluctuation in the water quality.Compared with the water reduction scheme,the water increase scheme had a better effect on increasing the flow velocity water and reducing the concentration of total nitrogen and total phosphorus.Compared with the inflow of the Bayi Canal,the inflow of the Donggan Canal was more conducive to increasing the flow velocity of Shahu lake and reducing the concentration of total nitrogen and total phosphorus.In general,one of the four water transfer schemes(water increase scheme)was the best scheme to improve the hydrodynamic conditions and water quality of the Shahu Lake.

关 键 词：沙湖 调水引流工程 水动力 水质 EFDC模型 

分 类 号：X143[环境科学与工程—环境科学] TV68[水利工程—水利水电工程]