首页 | 本学科首页   官方微博 | 高级检索  
     

城陵矶综合枢纽工程建设对洞庭湖水动力影响模拟研究
引用本文:田泽斌,王丽婧,郑丙辉,李小宝. 城陵矶综合枢纽工程建设对洞庭湖水动力影响模拟研究[J]. 环境科学学报, 2016, 36(5): 1883-1890
作者姓名:田泽斌  王丽婧  郑丙辉  李小宝
作者单位:1. 北京师范大学水科学研究院, 北京 100875;2. 中国环境科学研究院, 国家环境保护饮用水水源地保护重点实验室, 北京 100012,中国环境科学研究院, 国家环境保护饮用水水源地保护重点实验室, 北京 100012,中国环境科学研究院, 国家环境保护饮用水水源地保护重点实验室, 北京 100012,中国环境科学研究院, 国家环境保护饮用水水源地保护重点实验室, 北京 100012
基金项目:国家重点基础研究发展计划项目(No.2012CB417004);洞庭湖江湖生态监测重点站项目(No.2015-GOT-007);洞庭湖生态观测研究站;城陵矶综合枢纽对洞庭湖水质的影响及对策研究课题
摘    要:受流域降雨量偏枯以及三峡工程蓄水运行等综合影响,洞庭湖季节性干旱问题近年来日益突出.为缓解洞庭湖旱情,湖南省和湖北省政府提出了建设城陵矶综合枢纽工程.枢纽工程的建设,将改变洞庭湖水动力特征,影响湖区生态环境.该研究基于MIKE 21模型构建了洞庭湖二维水动力模型,模拟预测了枢纽工程建设前后洞庭湖湖体水位、流速等水动力参数变化特征.验证结果显示:水动力模拟结果与实测值吻合较好,模型计算结果有效可靠.模拟结果显示:城陵矶综合枢纽调度运行后,能够有效抬升全湖水位0.78~1.06 m,增加湖泊面积5.96%~10.84%,增加湖容31.18%~39.69%.枢纽工程对缓解洞庭湖秋季旱情、春季旱情作用明显,能够在一定程度上解决洞庭湖枯水期提前、枯水期延长、枯季水位偏低等问题.随着水位的抬升,湖体流速有不同程度的减小,退水期、枯水期平均流速由0.30 m·s-1和0.23 m·s-1降至0.28m·s-1和0.19 m·s-1,分别降低了6.67%、17.39%.城陵矶综合枢纽运行后,水流速度减缓、水体滞留时间延长,将加大湖体富营养化风险.

关 键 词:洞庭湖  城陵矶  枢纽工程  水动力  模拟
收稿时间:2015-05-31
修稿时间:2015-09-01

Impact simulation of the Chenglingji hydraulic project on hydrodynamics of Dongting Lake
TIAN Zebin,WANG Lijing,ZHENG Binghui and LI Xiaobao. Impact simulation of the Chenglingji hydraulic project on hydrodynamics of Dongting Lake[J]. Acta Scientiae Circumstantiae, 2016, 36(5): 1883-1890
Authors:TIAN Zebin  WANG Lijing  ZHENG Binghui  LI Xiaobao
Affiliation:1. College of Water Sciences, Beijing Normal University, Beijing 100875;2. State Environmental Protection Key Laboratory of Drinking Water Source Protection, Chinese Research Academy of Environmental Sciences, Beijing 100012,State Environmental Protection Key Laboratory of Drinking Water Source Protection, Chinese Research Academy of Environmental Sciences, Beijing 100012,State Environmental Protection Key Laboratory of Drinking Water Source Protection, Chinese Research Academy of Environmental Sciences, Beijing 100012 and State Environmental Protection Key Laboratory of Drinking Water Source Protection, Chinese Research Academy of Environmental Sciences, Beijing 100012
Abstract:In recent years, seasonal hydrological drought in Dongting lake became serious due to lower rainfall and the impoundment of Three Gorges Project etc. In order to mitigate the hydrological drought, Hunan and Hubei governments put forward the construction of Chenglingji hydraulic project (CHP). However, CHP would alter the hydrodynamics and consequently change the water ecological environment. Therefore, a two-dimensional model for Dongting lake based on the MIKE 21 software was constructed to predict the possible influence of CHP on the characteristics of water level and velocity of Dongting lake. The simulation results show that the CHP''s operation would effectively uplift the whole water level of 0.78~1.06 m, increase the lake area of 5.96%~10.84%, and raise the lake volume about 31.18%~39.69%. The verification results show that the simulation values were coincide with the measured values, which proved that the model were efficient and reliable. CHP could mitigate prominently seasonal hydrological drought (autumn, spring drought) of Dongting Lake and solve the problems to some extent, such as earlier and longer dry season and lower water level. However, the uplifting of the water level resulted in lower water velocity. The velocity would decrease from 0.3 m·s-1 to 0.28 m·s-1 at water-falling stage and from 0.23 m·s-1 to 0.19 m·s-1 at drought period. The change would extend the water retention time and then increase the risk of eutrophication in the lake.
Keywords:Dongting Lake  Chenglingji  hydraulic project  hydrodynamics  simulation
本文献已被 CNKI 等数据库收录!
点击此处可从《环境科学学报》浏览原始摘要信息
点击此处可从《环境科学学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号