Fluctuation in the Level of the Caspian Sea and its Consequences Akimgali Kenzhegaliev, Assylbek Kanbetov, Dauren Kulbatyrov, Aiauzhan Shakhmanova and Ainagul Abilgaziyeva E3S Web Conf., 288 (2021) 01064 Published online: 14 July 2021 DOI: 10.1051/e3sconf/202128801064