沿海堵港蓄淡水库加快水体淡化措施的研究

兴建堵港蓄淡水库是浙江省沿海解决水资源短缺措施之一.以浙江省玉环县漩门二期堵港蓄淡水库为例,针对库内深潭分布和盐度分布特点确定抽排位置和规模,并采用Delft3D三维模型计算设计水文条件下采取深水泵抽排深潭底部咸水措施后库内水体淡化过程及其效果.计算结果表明,采用深水泵抽排库内深潭底部咸水,3年后库内剩余盐分只有未采用抽排措施的40%,加快了水体淡化过程,缩短了该水库投入供水的时间.

Study on accelerating water desalination in polder reservoir for storage of fresh water along the coast

The polder reservoir,storing fresh water,is one of the measures to solve water-deficient problems in the coastal areas.How to accelerate water desalination process is the most important problem in a polder reservoir.Pumping out the saline water near the bottom in the deepwater areas is one of the effective measures to accelerate this process.In this paper,the pumping locations and scales are determined based on the salinity distribution and the volume of deepwater,and the Delft3D model is employed to calculate the salinity variation during the period of 2004 to 2006 under the designed hydrologic conditions.After three-year operation,draining out the saline water near the bottom in the deepwater,the total residual salinity in the reservoir is only 40% comparing with without pumping.Numerical results indicate that it greatly accelerates water desalination process in the polder reservoir.