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Remote sensing observations with high spatial and temporal resolutions have been successful in overcoming the challenge of data availability in ungauged basins. In this study, we applied a Multi-Sensor Satellite (MSS) approach to understand the reservoir operation in the Nile river basin (NRB) with the focus on the joint operation of High Aswan Dam (HAD) and Toshka depression, located in the southwestern part of HAD. The MSS data, which integrates Landsat (5-8), Sentinel-2A, MODIS with hydrological model outputs, are used in a water balance model to derive the operation of HAD reservoir and Toshka depression. The results show that the MSS approach has a reasonable skill when modelling the Toshka inflow (i.e. HAD spillway outflow) with a Relative Error and R 2  of −19.14% and 0.79, respectively (for the period 1998–2002). Overall, our study provides a framework that harnesses free available sensors to infer the operation of lakes and reservoirs in the NRB.

Inferring the joint operation of high Aswan dam and Toshka depression using multi-sensor satellite approach