The Effect of Vegetative Coverage and Altitude on the Vegetation Water Consumption in the Alpine Inland River Basin of the Northeastern Qinghai–Tibet Plateau

Estimating accurately the vegetation water consumption (VWC) in Qinghai Lake Basin (QLB) is conducive to effective utilization and management of resources QLB, which great significance construction a national park QLB. We used Geographic Information System (GIS) technology remote sensing (RS) based on potential evapotranspiration data calculate VWC QLB from 2000 2020, analyzed influencing factors 2020. The results showed that (1) average value varied 242.96 mm 287.99 mm, was 267.07 total 79.05 × 108 m3 (2) In terms spatial variation VWC, did not increase significantly 2014, however, significant 2015 (3) As altitude gradient increases, 2020 downward trend with altitude. When increases by 100 m, decreases 13.47 2014 22.8 respectively. (4) Exploring mainly affected annual precipitation normalized difference index (NDVI) 2014. It combined effects temperature, precipitation, coverage along temperature Obviously, most important factor affecting regardless or variations.