Satellite altimetry for Indian reservoirs

Satellite radar altimetry has immense potential for monitoring fresh surface water resources and predicting the intra-seasonal, seasonal, inter-annual variability of inundated over large river basins. As part Preparation Surface Water Ocean Topography mission scheduled launch in mid-2022, present study aimed to evaluate performance inland bodies India. The Joint Altimetry Oceanography Network (Jason) with ARgos ALtiKa (SARAL/AltiKa) data were used derive levels 18 major reservoirs India by incorporating geophysical propagation corrections into range. In situ gauge altimetry-derived level time series from 2008 2019. results showed a strong correlation between Jason-2 determination coefficient (R2) root mean squared error (RMSE) ranging 0.96 0.99 0.28 m 1.62 m, respectively. Jason-3 had highest observation (R2 = 0.99) lowest 0.82), RMSE values 0.11 1.18 m. With an R2 range 0.93–0.99 0.20–1.05 SARAL/AltiKa presented greater accuracy than Jason mission. estimated can be utilized remote, inaccessible, or ungauged areas international transboundary rivers storage discharge estimations. However, remotely sensed depends on such factors as along-track distance, body area, geographical terrain conditions near bodies.