底泥盐分释放影响下的滨海水库水体盐度变化过程数值模拟

Numerical simulation of water salinity change process in coastal reservoir influenced by sediment salt release

为研究滨海水库大尺度水体盐度时空动态变化,改进了水动力与水环境数值模拟专业模型Delft3D中盐度输运方程的源汇项,对所得的数学模型计算值与理论值和实验值进行对比分析,并验证其合理性。结果表明,将改进后的Delft3D模型应用于拟建滨海水库的盐度变化过程模型,能定量预测不同工况情形下水库底泥盐分释放造成的盐度变化过程。

In order to study the spatial and temporal dynamic changes of water salinity at a large scale in coastal reservoirs,the source and sink terms in the salinity transport equations of the hydrodynamics and water environment numerical simulation model,i. e.,the Delft3 D model,were improved,and the improved Delft3 D model was validated by comparing the simulation values with theoretical values. The results show that the improved Delft3 D model can be applied to the simulation of water salinity change in a proposed coastal reservoir,and quantitatively predict the salinity change processes of the reservoir caused by the sediment salt release under different scenarios.