Аннотация:Monitoring of the following hydrological processes was carried out: breakup in the mouth areas of
rivers in the northern European Russia, the propagation of the spring flood wave and inundation in the Volga–Akhtuba floodplain and the Volga delta, a catastrophic flood in the Terek mouth area, and ice phenomena in the Volga mouth area and in the northern Caspian Sea. The results of satellite monitoring of seasonal processes in the Volga mouth area are presented.