The average annual inflow of Volga water into the Caspian Sea is about 240 billion cubic meters and the total annual estimate of the inflow of rivers leading to the Caspian Sea is 300 billion cubic meters. Of the other major rivers, such as the Kora, the Urals, the Turk, the Sefidrood, and the Haraz, a total of 34 billion cubic meters of water enters the Caspian Sea.
The water level of the Caspian Sea in 2019, following its declining trend since 1995, has reached its lowest level in 30 years.
According to ISNA, the average water level this year has decreased by 13 cm compared to 2018, equal to 27.18 meters. The recent drop in the water level of the Volga River, which supplies most of the river’s water to the sea, fell by about 22 percent in 2019, which could be one of the reasons for the recent drop in water levels.
The average annual inflow of Volga water into the Caspian Sea is about 240 billion cubic meters and the total annual estimate of the inflow of rivers leading to the Caspian Sea is 300 billion cubic meters. Other important rivers, such as the Kora, the Ural, the Turk, the Sefidrood, and the Haraz, bring a total of 34 billion cubic meters of water into the Caspian Sea.
The volume of water entering the rivers is considered as a very important indicator in the Caspian water balance and its annual changes are affected by climatic factors, hydrological regime and exploitation. The results of the study show that in 2019, the flooding period of the Volga River, which normally lasts from mid-May to early August, was shorter and its discharge rate was lower than the long-term average.
