Spatio-temporal terrestrial water storage changes in the Hexi Corridor derived by GRACE/GRACE-FO gravity satellites over the past 20 years
The Hexi Corridor is composed of Shule River Basin,Heihe River Basin and Shiyang River Basin.Water resources protection is of great significance to the ecological balance and economic development of the Hexi Corridor.The JPL GRACE/GRACE-FO Mascon model was used to derive the spatio-temporal terrestrial water storage changes in this region.Analyzing the water balance and spatio-temporal characteristics of terrestrial water storage combined GLDAS model,measured groundwater level and glacier water model.The results show that:(1)Due to the replenishment of precipitation and glacial meltwater,the spatial variations of terrestrial water storage in the southern Shule River Basin and most of the Heihe River Basin shows an upward trend,while the evapotranspiration consumption and agricultural expansion lead to the decline of terrestrial water storage in the northern Shule River Basin and Shiyang River Basin from April 2002 to January 2020.(2)It was found that human water consumption is an important factor in terrestrial water storage changes in Shule River Basin,Heihe River Basin and Shiyang River Basin,with average contribution rates of-24.49％,-47.20％and-43.29％respectively through the study of water balance.(3)The implementation of water resources management policies in the Hexi Corridor has reduced agricultural irrigation water consumption,controlled the expansion of cultivated land area and restrained the consumption of groundwater storage.
万方数据
维普
