Abstract
The Interconnected River System Network (IRSN) plays a crucial role in water resource allocation, water ecological restoration and water quality improvement. It has become a key part of the urban lake management. An evaluation methodology system for IRSN project can provide important guidance for the selection of different water diversion schemes. However, few if any comprehensive evaluation systems have been developed to evaluate the hydrodynamics and water quality of connected lakes. This study developed a comprehensive evaluation system based on multi-indexes including aspects of water hydrodynamics, water quality and socioeconomics. A two-dimensional (2-D) mathematical hydrodynamics and water quality model was built, using NH3-N, TN and TP as water quality index. The IRSN project in Tangxun Lake group was used as a testbed here, and five water diversion schemes were simulated and evaluated. Results showed that the IRSN project can improve the water fluidity and the water quality obviously after a short time of water diversion, while the improvement rates decreased gradually as the water diversion went on. Among these five schemes, Scheme V showed the most noticeable improvement in hydrodynamics and water quality, and brought the most economic benefits. This comprehensive evaluation method can provide useful reference for the implementation of other similar IRSN projects.
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Foundation: National Key Research and Development Program, No.2017YFA0603704, No.2017YFC1502500
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Yang, W., Zhang, L., Zhang, Y. et al. Developing a comprehensive evaluation method for Interconnected River System Network assessment: A case study in Tangxun Lake group. J. Geogr. Sci. 29, 389–405 (2019). https://doi.org/10.1007/s11442-019-1605-2
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DOI: https://doi.org/10.1007/s11442-019-1605-2