黄河流域城镇化对地下水的影响分

The Yellow River basin is an important ecological barrier in our country, as well as the main producing area for grain crops.In recent years,the distribution of local water resources has had a significant impact on the development of urbanization.As a result,it is critical to understand the impact of urbanization on the water cycle in the Yellow River basin.The characteristics of groundwater change in the Yellow River basin are analyzed using the Resource Environmental Science and Data Center' s Yellow River basin underlying surface data, population density and Gravity Recovery and Climate Experiment (Grace) data from the world population data set, and grid data of total land water storage from the Center for Space Research (CSR).The results show that there is a significant spatial difference in the degree of urbanization in the Yellow River basin, with urbanization intensifying in the lower reaches of the Yellow River and,in particular,the groundwater showing a downward trend.Comparing the difference of groundwater change among new urbanization, constant urbanization and disappearing urbanization in the Yellow River basin reveals that the decrease of groundwater is the smallest in the disappearing cities and towns; groundwater levels in new towns have fallen less than in areas that have always been urban. Therefore, as a typical arid and semi-arid region, the urbanization of the Yellow River basin plays a significant role in the reduction of groundwater, and the recent urbanization of groundwater protection has achieved good results.