Acta Geographica Sinica ›› 2018, Vol. 73 ›› Issue (1): 115-128.doi: 10.11821/dlxb201801010

• Surface Process and Ecological Environment • Previous Articles     Next Articles

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


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