Impending Hydrological Regime of Lhasa River as Subjected to Hydraulic Interventions—A SWAT Model Manifestation

The damming of rivers has altered their hydrological regimes. current study evaluated the impacts major interventions Zhikong and Pangduo hydropower dams on Lhasa River, which was exposed in form break change points during double-mass curve analysis. coefficient variability (CV) for hydro-meteorological variables revealed an enhanced climate phenomena River Basin (LRB), where (LR) discharge varied at a stupendous magnitude from 2000 to 2016. Mann–Kendall trend Sen’s slope estimator supported aggravated changes LRB, as rainfall LR were found have been significantly decreasing while temperature increasing had largest decrease relation temperature, revealing that along with climatic phenomena, additional are controlling regime LR. Reservoir functioning is altering discharge. Soil Water Assessment Tool (SWAT) modeling under reservoir’s influence performed well terms determination (R2), Nash–Sutcliffe (NSE), percent bias (PBIAS). Thus, simulation-based could substitute observed help data scarcity stress LRB. simulated–observed approach used predict future time span 2017–2025 using seasonal AutoRegressive Integrated Moving Average (ARIMA) model. predicted observation-based closely correlated 2017 2025. This calls efficient water resource planning management policy area. findings this can be applied similar catchments.