Influence of Underlying Surface Change on Hydrogeological Conditions in Arid and Semi-arid Regions

To study the relationship between landuse change and groundwater level, the transfer amount of land use change has been calculated by using transfer matrix based on the remote sensing images of the Hailiutu river basin in different periods. The spatial distribute on map of groundwater level and land use types have been obtained by combining the groundwater monitoring well data and geo-statistics in the catchment of the river, and the spatial and temporal variation of groundwater level and the effect of land use change on groundwater level have been analyzed in this paper. The results show that the variation of groundwater level presents obvious spatial distribution characteristics and the human factors have increased influence on the spatial variation of groundwater level; the land use type in this area has in tense spatial and temporal conversion, and the land use type changes violently in the area where the groundwater level changes sharply, indicating the reispositive correlation between the type change of land use and the spatial distribution of groundwater level.