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Accepted Paper:
Satellite-based drought assessment in the endorheic basin of Lake Balkhash.
Asset Yegizbayeva
(Al Farabi Kazakh National University)
Balkhash Lake is one of the most significant endorheic natural inland water reservoirs, and its catchment basin is situated between the Republic of Kazakhstan and the People's Republic of China. The lake provides to area potable water, irrigation, fishing, and hydropower production. The Balkhash Lake basin is an integral part of the regional economy on both sides of the border, therefore long-term based research is essential. For this study, we evaluated drought for its complicated natural hazard and an unavoidable occurrence in Central Asia, with consequential effects on the agriculture sectors. Due to a lack of data, drought assessment involves both ground-based observations and simulation-reanalyzed models. Therefore, we utilized remote sensing products to better comprehend the drought circumstances in the Balkhash Lake basin in Central Asia. This study evaluated the link between two sensitive drought indices: the gravity recovery and climate experiment - drought severity index (GRACE-DSI), and the vegetation health index (VHI). research accounts for the variability in regional terrestrial water storage balance impact on vegetation growth. the Balkhash lake level was predicted using the ESA LAND cover dataset from 1992 to 2020, and it illustrated decreasing trend, respectively. From 2002 to 2020, the probability of drought incidence was calculated at Seasonal and monthly time scales. Based on our results, GRACE-DSI is substantially correlated with VHI, GRACE-DSI, and lake water area (r=0.8). Overall, GRACE-DSI and VHI indices are useful for exploring and quantifying drought severity at the basin size.