The Sedimentation Rate in the Crimean Hypersaline Lake Aktashskoye Estimated Using the Post-Chernobyl Artificial Radionuclide 90Sr as a Radiotracer

Artificial 90Sr is one of the most important long-lived radionuclides global radioactive fallout from atmosphere after testing nuclear weapons and accident at Chernobyl Nuclear Power Plant in 1986. In addition to atmosphere, secondary contamination Crimea was mainly Dnieper River North Crimean Canal, which occurred until 2014. used as optimal radiotracer for estimating rate sedimentation hypersaline lake. Its vertical distribution bottom sediments assessed. core sediments, detectable activity layers 0–1.5 cm 16.7–21.9 absent, it determined again layer 15.5 cm, associated with atmospheric radionuclide NPP accident. There were well-isolated peaks specific a depth 4.6 13.3–14.3 cm. The calculated varied within 0.5–1.5 year?1: minimum corresponded period 1971–2017, highest 1954–1971.