Predicting of temporal-spatial change of groundwater table resulted from current land use in Minqin oasis

The paper combines GIS and the FEFL.OW sofware,a special software modeling groundwater flow with finite element method,to rmdel groundwater flow affected by current land use in Minqin oasis,Gansu province,China.The results show that the current land use mode would result in rapidly descending of groundwater table in the oasis.There wauld be two groundwater funnels in the oasis in 2010,and the funnel centers would be located at center of the oasis,the groundwater table in funnel centers wauld be 47 to 52 m,and the groundwater in oasis wauld be table 9 to 34 m deeper than it in 1997.The analysis shows that if the current land use is kept,the groundwater would gradually be used up and sped up desertification in Minqin oasis in the condition of water amount fixedness or decreasing of upper reaches;on the other hand,if the crop cultivation structure is adjusted and the watersaving technologies are extended,the groundwater pumping amount would be decreased and the descending of groundwater table wauld be slowed.