INFLUENCES OF THE MID-ROUTE OF THE SOUTH-NORTH WATER DIVERSION PROJECT ON QUATERNARY GROUNDWATER RESOURCES IN THE HENAN PLAIN
南水北调中线工程对河南平原第四系地下水资源的影响

The South-North Water Diversion Project was put forward for optimizing the national allocation of water resources and solving water shortage problems in Northern China.With the reservoir action of the mid-route of the South-North Water Diversion Project,which will resulted in transfer of water from groundwater to surface water in the water-received areas,the main water supply source,Quaternary groundwater resources in the Henan plain,would be influenced in the future.Through establishing a groundwater flow numerical simulation model,this paper simulated the effect of the project on Quaternary groundwater of Henan plain by correspondingly decreasing the exploitation quantity of the shallow groundwater in water received areas according to the allocated water quantity.The simulating results indicate that the water level of the shallow groundwater would be restored in some degree in the water received areas.By 2010,for example,in the centers of the groundwater depression funnels of Zhengzhou,Xinxiang and Puyang,the water level would be increased by 6.64m,8.15 m and 4.15m,respectively,compared with that before 1 January,2007 when beginning of the project.Therefore,this project would greatly decrease the exploitation of groundwater and alleviate the pressure of water shortage.However,the water level of shallow groundwater in the water non-received areas of the middle and east of the Henan plain would decline continuously as a result of groundwater over-extraction for agriculture irrigation.In spite of being out of the water-received area,the southern would be constant in water table,which can be explained by that local water supply is mainly from surface water.Combined with results of previous researchers,it can be predicted that the amount of water allocated to water-received areas by the project to be equal to their demand by 2010.