Journal of Yangtze River Scientific Research Institute ›› 2023, Vol. 40 ›› Issue (10): 30-34.DOI: 10.11988/ckyyb.20220722

• Water Resources • Previous Articles     Next Articles

Application of Numerical Simulation to Calculating Water Demand in Karst Wetland

WU Pei-lin1,2, PAN Yue1,2, WU Wei-xiong1,2, LIANG Xue-wen1,2   

  1. 1. Guangxi Institute of Water Resources Research, Nanning 530023, China;
    2. Guangxi Key Laboratory of Water Engineering Materials and Structures, Nanning 530023, China
  • Received:2022-06-28 Revised:2022-08-16 Online:2023-10-01 Published:2023-10-13

Abstract: In an attempt to restore the ecology of karst wetlands, numerical simulation was conducted to calculate the water demand of wetland. We employed Mike21 for 2D numerical calculation of water demand and water replenishment scheme of Huixian wetland in the condition of multi-year average water level. By obtaining the correlation of internal water level between Liangfeng Station and Huixian wetland, we identified that the multi-year average water level of Huixian wetland is 148.86 m. Under this water level, the ecological water demand and environmental water demand of the wetland are 3.87×106 m3 and 3.67×106 m3 respectively, resulting in an overall water demand of 3.87×106 m3. Through analysis of surface water system, we determined the water replenishment route from the Huixian River through the ancient Guiliu Canal at a flow rate of 5 m3/s. Simulation results demonstrate that the water surface rate of the wetland remains within the normal range after replenishment.

Key words: wetland water demand, water replenishment scheme, Mike21 model, numerical simulation, Huixian karst wetland

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