NEW DATA ON SILTING OF THE KRASNODAR RESERVOIR

The paper analyzes spatial features and long-term dynamics of silting the Krasnodar Reservoir, key object entire reclamation system region with a 3.35 billion m3 annual limit water intake for irrigation; analysis is based on bathymetric survey data. Accurate up-to-date estimates siltation volumes changes in hydrometric characteristics reservoir are necessary to develop correct strategy consumption resources region. has noticeably transformed since it was put into operation 1973: divided two independent reservoirs formation an extensive barrier from sediments Kuban Belaya rivers, transformations continuing. Bathymetric surveys 2005, 2016, 2021 were used calculate Reservoir. We have established that, taking account detached Tshchikskoe Reservoir bridge that formed, over period 2005–2021 area mirror at normal retaining level decreased 382 224.2 km2, while useful volume diminished 1,606 1,270.4 million m3. Over same period, dead 192 135.1 During between last surveys, amounted 24.66 m3; average rate 2016–2021 (4.93 m3) found be lower than value 2005–2016 (6.86 m3). With background thickness silt layer about 0.1 m its greatest values (1–3 more) noted below protruding delta section more 2 km long.