Abstract
After a catastrophic decline in the water level at the end of the 20th century, the formation of a new delta of the \nriver Syrdarya has begun. The modern delta of the river is located within the Kazalinsk and Aral regions in \nKyzylorda oblast. This paper gives an assessment of the hydroecological state of the river’s delta. The \nhydrological and ecological characteristics of the Syrdarya delta were evaluated using the data from the \nKarateren and Kazalinsk gauging stations. A number of hydroecological indicators are given, such as: water \nlevel, annual flow, delta area, mineralization, content of suspended substances, copper and biochemical oxygen \nconsumption (BOС5) in the river. All indicators were compared to the maximum permissible concentration \n(MPC).