基于EFDC的咸潮上溯对闽江下游水源地的影响

为保障咸潮上溯情况下闽江下游水源地供水安全,建立基于EFDC的二维水环境数学模型,利用2013年12月同步监测资料进行参数率定,模拟不同流量条件下咸潮上溯的距离以及对水源地的影响。结果表明:咸潮上溯距离与下泄流量成负相关关系;咸潮上溯距离的增加将延长下游水源地的不宜取水时间。为减缓咸潮上溯对闽江下游水源地的影响,建议优化水口水库调度方式,加大下泄流量。

Influence of saltwater intrusion on water source land in downstream of Minjiang River based on EFDC

In order to insure the water safety of water source affected by saltwater intrusion in the downstream of Minjiang River,the paper established a two-dimensional numerical model based on environmental fluid dynamics code (EFDC).It calibrated the parameters of the model by using synchronous data in December 2013 and simulated the distance of salinity intrusion and the impact on water source land under the condition of different flows. Results indicate that the range of salinity intrusion is negatively correlated with the discharged; the increase of saltwater intrusion distance will extend the unsuitable water intake time of water source in the downstream of Minjiang River. In order to mitigate the impact of saltwater intrusion on water source, the paper recommended that it is necessary to optimize the operation ways of Shuikou reservoir and increase discharged.