卡拉贝利水库对河流末端地下水埋深的影响

重点水利枢纽工程区域环境现状、发展趋势及水库运行对环境可能产生的影响是环境影响评价工作的重要组成部分。本文分析了克孜河下游河岸林草区的水分运动和补给关系,计算地下水补给量变化值和埋深变化值,预测卡拉贝利水库修建后天然植被的生长状况,为项目决策和工程环境管理提供科学的依据。通过建立区域水均衡模型,模拟工程修建前后,区域地表水与地下水的水量分配和流转关系及平衡状况变化,通过监测研究区地下水埋深数据,模拟工程建成前后河流末端河岸带林草区地下水埋深的分布变化情况,分析由于工程建设导致地下水位变化进而对河岸带林草的影响。结果表明:研究区总体上是河道地表径流补给地下水,河道过水期水面线高于地下水位,河道地表径流与地下水的补给关系是地表水补给地下水,在断流期河道两岸地下水位高于河床高程,地下水侧向渗出补给地表水。

Impact of Carabailey reservoir on groundwater level depth of river end

The impact of regional environmental status, development trend and reservoir operation in key water control project area on the environment is an important part of the environmental impact assessment work. This paper analyzed the water movement and supply relationship of forest and grass area at Kirgiz River downstream , calculated the change amount of groundwater recharge and depth, predicted growth conditions of natural vegetation after reservoir construction. The result can provide a scientific basis for project decision-making and engineering environmental management. Through establishing the regional water balance model Before and after construction of the project, the paper simulated surface water and groundwater water distribution of the area,circulation relations and balance change.Through monitoring study area groundwater depth data ,it also simulated the situation of groundwater level changes of forest and grass area before and after the project was completed around the river end,and analyzed the influence of groundwater level changes on riparian forest and grass because of the construction of project. The result indicated that the river surface runoff supplies groundwater,the water surface line of river is higher than groundwater level during the period of runoff, the relationship of river surface runoff and groundwater is that surface water recharges groundwater, during Shut-off period the groundwater level is higher than the riverbed elevation, groundwater of lateral penetration supplies surface water.