基于变密度地下水流模型分析预测沿海地区海水入侵  

Analysis and Prediction of seawater intrusion in coastal areas by variable density groundwater flow model

作　　者：张野 ZHANG Ye(Liaoning Panjin Hydrographic Bureau,Panjin 124010,China)

机构地区：[1]辽宁省盘锦水文局,辽宁盘锦124010

出　　处：《水资源开发与管理》2020年第8期54-60,共7页Water Resources Development and Management

摘　　要：辽宁大清河发生的海水入侵一方面是由于潮汐作用下的海水沿河道上溯,并向四周补给低水位地下水所产生的入侵;另一方面是由于地下水的大量开采形成降落漏斗,降落漏斗中心水位远低于海平面,海水沿水力坡降方向入侵。本文采用变密度地下水流动数学模型模拟该区域海水入侵过程,从监测井数据与模拟数据对比分析来看,该模型识别所得参数基本符合该区域的海水入侵的实际情况,效果较好。In this paper,the Daqinghe River in Liaoning is taken as an example.On the one hand,the seawater intrusion in this area is caused by the seawater flowing up the river channel under the action of tide and supplying the groundwater with low water level around.On the other hand,a large amount of groundwater is exploited to form a landing funnel.The water level in the center of the landing funnel is far lower than the sea level,resulting in an inland hydraulic gradient,and seawater invades along the hydraulic gradient direction.In this paper,the variable density groundwater flow mathematical model is used to simulate the seawater intrusion process in this area.From the comparison and analysis of monitoring well data and simulation data,the parameters identified by the model basically conform to the actual situation of seawater intrusion in this area,and the effect is good.

关 键 词：模型 不确定性 模拟结果 海水入侵 

分 类 号：P641.8[天文地球—地质矿产勘探]