Impact of climate change and human factors on the water regime of the Danube Delta

Climate changes in the Danube Delta, as well as changes in water temperature, water runoff and sediment yield, have been identified on the basis of available observational data. It has been shown that the intra-annual distribution of water runoff has become more uniform in recent decades. It decreased in April-May and increased in February-March. At the same time, there has been a significant decrease in sediment transport. Changes due to anthropogenic impact were detected in water runoff in the largest river branches, in particular, the reduction of the share of the Kiliyskyi branch. Over the past 60 years, the water temperature in the Danube Delta has increased significantly, by more than 2°C. In general, the water temperature is higher than the air temperature, especially in autumn. Some features of the delta formation have been identified.