入海洪水资源的海洋水库开发模式研究

阐述了海河流域河流水环境现状和滨海地区开发汛期入海洪水资源的必要性.结合天津市海挡防护规划,提出了将永定新河河口规划的人工潟湖作为海洋水库的构想.利用三维水动力和水质耦合模型,模拟了关闭退水闸、开启退水闸等不同蓄水条件下拟建海洋水库存蓄入海洪水的水量、盐度变化过程,结果表明,蓄水时关闭退水闸水库整体的盐度较高;蓄水时适时开启退水闸可促进高盐度水的稀释和置换;取水过程引起海洋水库底层水体均匀掺混,但水库上层、中层的淡水盐度保持稳定.

Research on exploitation model for flood resources storage based on shallow sea reservoir construction

The present situation of regional rivers and water resources has been exposited based on the historical hydrographic data since last century in the Haihe River Basin,and the necessity of storage for flood resources was discussed.Combined with the breakwater safety programming of Tianjin,China a design scheme to build a artificial lagoon at the Yongdingxin River entrance as an ocean reservoir was presented.Making use of the 3-D hydrodynamic and water quality coupling computation model,water quantity and salinity dynamic process of impounding into the planning ocean reservoir were simulated under different conditions of opening the drainage sluice gate and closing the intake sluice gate.Results show that salinity in the ocean reservoir was higher when the drainage sluice gate was closed;the dilution and permutation course of high salinity water can be promoted by opening the drainage sluice gate;pumping from the ocean reservoir can cause the intermixing phenomenon of reservoir bottom water body and salinity,however the low-salinity freshwater of top and central section in the ocean reservoir can keep stability.