Artificial water reservoirs are regularly subject to large water level variations. The resulting significant load changes result in elastic deformation of the surrounding area in the form of uplift when discharging a large amount of water and in the form of subsidence when replenishing a large amount of water again. Radar remote sensing can be used to monitor such types of deformation. With the new generation of SAR sensors aboard the Sentinel-1 satellites, which capture wide-swath, high-resolution images at a 12-day sampling rate, we can provide detailed information about the dynamics of the reservoir's environment due to loading and unloading effects and derive rheological parameters for constraining earth surface models.