This research is dedicated to the evaluation of water supply in agricultural areas of the Xinjiang Uyghur Autonomous Region, People's Republic of China (XUAR PRC) for the last 17 years between 2003 and 2019. In summer there is no natural vegetation in the arid climate in XUAR PRC. Mostly, this territory's water is supplied by transboundary (Kazakhstan-China) rivers: Ili and Black Irtysh. Cropping in XUAR PRC is based on irrigated agriculture which is the most significant consumer of river water современные проблемы дЗЗ из космоса, 17(1), 2020 137 А. Г. Терехов и др. диагностика водообеспеченности сельскохозяйственных культур суаР кнР.… resources. The NDVI values reflect the agricultural vegetation state that ultimately depends on the moisture regime of the root-inhabited soil layer. Thus, the seasonal NDVI maximum of the agricultural regions is directly related to the share of the cropland and soil moisture regimes. We used the long-term dynamics of the average NDVI values (first 10 days of July) for twelve agricultural zones of the XUAR located on the Dzungar and Kashgar plains and in the Ili River Valley (China's section). The pro duct e-MODIS NDVI FEWS NET (Early Warning and Environmental Monitoring Program) with ten days renewal and resolution 250 m was used. It was obtained that during 2003-2019, for the agricultural areas of Dzungar and the Kashgar plains NDVI increased mainly because of cropping expansion. The water-abundant region of River Ili Valley and the basin of the River Khaidyk-Gol demonstrated insignificant NDVI increases because there was no additional land suitable for cropping. The sustainability of water availability in the Dzhungar Plain agricultural region was estimated from NDVI dynamics of mouth zones of rivers Bolo-Tala, Kuitun and Manas. There were no negative NDVI trends which indicates stability in the river outflows from the agricultural zones. Therefore, we can ascertain the sustainability of water supply for the Dzungar Plain cropping and good potential for further development.
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