supported by the Special Fund for Basic Scientific Research of Central Colleges,South-Central University for Nationalities(No.CZY12021);the National Natural Science Foundation of China(No.40672157);the 863 Program of China(No.2007AA06Z337)
In groundwater management,the exchanges between groundwater and other water such as surface water and spring water need to be considered.Some exchange is dependent on the ground-water level,which is called covariate.T...