Recomputation of Groundwater Stimulated Recharge in Jiansanjiang Area of Sangjiang Plain

Although the groundwater stimulated recharge in Jiansanjiang Area of Sanjiang Plain was not taken into account in ever-made evaluations of groundwater resource,the computation and the preliminary analysis has been made .By researching mining practice of groundwater in recent years,the importance and status of groundwater stimulated recharge made the re-analysis and recomputation in this paper.During the course of recomputation,a computation reflecting the balance between groundwater supply and mining was carried out,the result shows that the groundwater stimulated recharge,in some typical farms such as Chuangye,has reached 1.8 times of originally-evaluated groundwater resource quantity.Computing by direct ratio function between water supplememtal recharge and water level differences,the present average water level all around the general bureau is 45.67m,thus,a conclusion come into being: in the future,the groundwater mining will be enhanced with the development of rice planting,which will caused the decline of water level,when the water level decline to 40.00m,not only will groundwater be fully recharged in all the farms of the general bureau but also the groundwater reserve will reach more than 13×108 m3 which is 1.2 times of the originally-evaluated groundwater reserve in all the farms of the general bureau,which can meet rice planting development's demand for water in the far and near future.