地理学报 ›› 2018, Vol. 73 ›› Issue (1): 115-128.doi: 10.11821/dlxb201801010

• 地表过程与生态环境 • 上一篇    下一篇

基于水环境改善的城市湖泊群河湖连通方案研究

杨卫1(),张利平1,2(),李宗礼3,张艳军1,肖宜1,夏军1   

  1. 1. 武汉大学水资源与水电工程科学国家重点实验室,武汉 430072
    2. 黄冈师范学院,黄冈 438000
    3. 水利部水电水利规划设计总院,北京 100120
  • 收稿日期:2017-05-16 出版日期:2018-01-31 发布日期:2018-01-31
  • 基金资助:
    国家自然科学基金项目(51339004);国家重点研发计划项目(2017YFA0603704);湖北省科技计划项目(2015BCA290)

Interconnected river system network scheme of urban lake group based on water environment improvement

YANG Wei1(),ZHANG Liping1,2(),LI Zongli3,ZHANG Yanjun1,XIAO Yi1,XIA Jun1   

  1. 1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
    2. Huanggang Normal University, Huanggang 438000, Hubei, China
    3. General Institute of Water Resources and Hydropower Planning and Design, Ministry of Water Resources, Beijing 100120, China
  • Received:2017-05-16 Online:2018-01-31 Published:2018-01-31
  • Supported by:
    National Natural Science Foundation of China, No.51339004;National Key Research and Development Program, No.2017YFA0603704;Hubei Province Science and Technology Program, No.2015BCA290

摘要:

河湖水系连通作为水资源调配、水生态修复与改善的重要手段,已成为江河湖泊治理工作的重点之一。河湖水系连通方案的选择和连通效应的评估直接关系到连通工程对湖泊水动力和水环境的改善效果,但目前缺乏对水系连通后河湖水动力和水质的综合评估体系。以汤逊湖湖泊群为研究对象,构建二维水动力水质数学模型,选取NH3-N、TN和TP作为水质指标,模拟不同连通方案下汤逊湖湖泊群的流场及水质变化情况,结合水动力、水质和经济社会三个方面的评价指标建立综合评价体系,对各连通方案下湖泊群的改善效果进行评估。研究结果表明:引水后湖泊水体流动性有了很大的改善,河湖连通工程能够在短时间内达到改善湖泊水质的目的,但随着引水时间的增长,改善率逐渐减小。通过对比五种连通方案发现,方案五对水动力和水质的改善都取得了最显著的效果,且能够带来最大的引水效益。

关键词: 河湖连通, 水动力水质模型, 水环境改善, 方案评估, 汤逊湖湖泊群

Abstract:

The Interconnected River System Network (IRSN), which plays a significant role in water resource allocation, water ecological restoration and water quality improvement, has become a key part of the urban lake management. The optimization of IRSN scheme and the evaluation of IRSN effects have a direct influence on the improvement of hydrodynamics and water quality. However, no comprehensive evaluation system has been built up to evaluate the hydrodynamics and water quality of the connected lakes. In this paper, a two-dimensional mathematical hydrodynamics and water quality model was built, and indexes including NH3-N, TN and TP were chosen as the water quality indexes to simulate the flow field and water quality of the Tangxun Lake group under different IRSN schemes. In addition, a comprehensive evaluation system based on evaluation indexes from the aspects of water hydrodynamics, water quality and socioeconomics was established to evaluate the IRSN effects of the Tangxun Lake group. The results showed that the fluidity of lakes improved greatly after the water diversion. The IRSN project can improve water quality of the lakes in a short time, while the improvement rate decreased gradually as the water diversion time increased. The comparison of these five schemes mentioned in this paper indicated that the fifth scheme (concurrent diversion from Donghu Lake and Liangzi Lake) can achieve the most obvious improvement in both hydrodynamics and water quality and generate the most economic benefits.

Key words: Interconnected River System Network (IRSN), hydrodynamics and water quality model, water environment improvement, scheme evaluation, Tangxun Lake group