南海湿地生态长效补水优化控制方法研究

为了改善南海湿地生态环境，提出一种新的南海湿地生态长效补水优化控制方法。针对包头市南海湿地景区，依据圣维南方程组建立水动力模型，通过双扫法完成数值计算，构造水量及水质模型。求出各网格的水位和水流变化情况，将质量守恒方程与动量方程作为依据进行补水，保证补水后南海湿地符合质量守恒方程，实现南海湿地生态长效补水优化控制。对其进行离散处理，通过有效差分法中的追赶法对组成不同网格的方程组进行计算。在求解的过程中，若对流过程占主导，则求解过程中采用高阶空间离散较为合适。若扩散过程占主导，则采用低阶空间离散。选择控制点，研究水质变化情况、经济效益变化情况及生态环境改善情况，发现所提方法能够改善水质及生态环境，提高经济效益。

Study on optimal control method for long term replenishment of wetland in South China Sea

In order to improve the ecological environment of the South China Sea wetland, a new optimal control method for long term replenishment in the South China Sea wetland was proposed. Based on the Saint Venant equations, a hydrodynamic model was established for the wetland area in the South China Sea in Baotou. The water and water quality models were constructed by double sweep method. The water level and flow change of each grid are obtained. The conservation equation of mass conservation and momentum equation are used as the basis for replenishing water, and the quality conservation equation of the South China Sea wetland is consistent with the quality of the South China Sea. It is discretized and processed by the chase method in the effective difference method. In the process of solving, if the convection process dominates, the higher order spatial discretization is more suitable for solving the process. If the diffusion process dominates, the low order spatial discretization is adopted. The control points are selected to study the change of water quality, the change of economic benefit and the improvement of the ecological environment. It is found that the proposed method can improve the water quality and the ecological environment and improve the economic benefit.