Discussion on the Evaluation Methods of Groundwater Resource in the Water Applying Field nearby a River

The wells field near by a river is a common way to exploit the groundwater resource that is an important part of water resources.The groundwater management models based on hydraulic model,such as two-dimensional flow model,sat uratedly three-dimensional flow model and saturated-unsat urated flow model,are efficient tools to evaluate the groundwater resources in the case.The two-dimensional flow model,in which the adjacent river of that field is supposed to penetrate through aquifer completely,and the saturatedly three-dimensional flow model,in which the river can be treated as real case,are more popular.The groundwater resource calculated by the two-dimensional flow model,though the model prevails on the groundwater exploration of our country,must be more than the real resource from aquifer.In order to protect the environment and keep a forever use of the water resources,the saturatedly three-dimensional flow model,even saturated-unsaturated flow model,will be employed in the future.