Study of the Ecological State of Lake Alakol in Zhetysu region Guldana Seitova, Dinara Soltanova, Gaziza Kasseinova, Nursara Muratbek and Assel Butenova E3S Web of Conf., 390 (2023) 04020 Published online: 01 June 2023 DOI: 10.1051/e3sconf/202339004020