Water Environment Numerical Simulation for a Complicated River-Lake System

Abstract:

Zhushan Bay watershed to the northwest of Lake Taihu was selected as the research area. Taking the close connection of water quality and quantity of river-lake system into consideration, we constructed a water environmental coupling model of 1-D river network and 2-D lake to simulate hydrodynamic and water quality of river-lake system. Based on the results of field measured data, the constructed model was calibrated and validated. According to results of calibration, the range of river roughness was 0.02~0.028, the degradation coefficient of COD, NH₃-N and TP degradation coefficient was 0.09~0.11 d^-1, 0.05~0.07 d^-1 and 0.04 d^-1, respectively; the lake bottom roughness was 0.025, the wind stress coefficient was 0.0013, the degradation coefficient of COD, NH₃-N and TP degradation coefficient was 0.06、0.04 and 0.02 d^-1, respectively. The calculated results fit well with the experimental results, indicating that the model has good practicality.

• Periodical: Advanced Materials Research (Volumes 1010-1012)
• Pages: 403-408
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1010-1012.403
• Online since: August 2014
• Authors: Hua Wang*, Feng Qiang Ji, Kun Xia, Meng An Wu
• Keywords: Coupling Model, Lake Taihu, Numerical Calculation, River Network, River-Lake System

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