The Caspian Sea has reached its lowest recorded level, now standing at less than 29 meters below sea level. The northern basin, which borders Russia and Kazakhstan, is shrinking particularly rapidly.
As the water recedes, the exposed seabed is threatening key marine ecosystems. Experts warn the decline is already causing serious disruption to biodiversity in the region, The Caspian Post reports citing foreign media.
Declining Volga Flow and Climate Change
The downward trend in sea levels began in the 1990s and has accelerated since 2020, with a nearly 80-centimeter drop in the past four years. The primary factor is a decrease in the annual flow of the Volga River, which supplies approximately 80% of the Caspian’s inflow and contributes 64% to the lake’s total water balance.
In recent years, the Volga’s annual discharge has ranged between 210 and 232 cubic kilometers, well below the historical average of around 250 cubic kilometers. At the same time, rising air temperatures are increasing evaporation rates, further depleting water levels. Scientists link these changes to global climate change and the ongoing rise in greenhouse gas emissions.
Ecological and Economic Impact
Human activity is compounding the problem. Significant water extraction from rivers for agriculture, industry, and municipal use is reducing the volume of water reaching the sea.
Russia’s Ministry of Natural Resources is currently developing a comprehensive program to adapt to these shifting environmental conditions. The initiative aims to enhance forecasting, mitigate the consequences of shallowing, and adjust economic activities to reflect the new hydrological realities.
Experts suggest that only a sustained annual inflow of around 270 cubic kilometers, comparable to levels recorded in the 1970s and 1990s, can halt the lake’s ongoing decline.
Changing Coastlines and Public Concern
A recent video by Kazakh filmmaker Adai Myrzatay has stirred widespread attention on social media. The footage juxtaposes images of the Caspian coastline in 2013 and 2025. Twelve years ago, the pier was surrounded by open water and untouched shoreline. Today, the water has receded dramatically. Bushes now encircle the pier, and high-rise buildings stand where the shoreline once lay. The video has been viewed over 1.5 million times.
The falling water level is leading to the loss of biological diversity and shrinking spawning grounds for species such as the Caspian seal and sturgeon. The shallowing is also disrupting shipping and fishing operations and raising the risk of international disputes over increasingly scarce water resources.
A Shared Challenge for Five Nations
The Caspian Sea, the world’s largest enclosed inland body of water, receives inflow from more than 130 rivers, including the Volga, Ural, Terek, Sulak, and Samur. Its coastline is shared by five countries: Russia, Kazakhstan, Turkmenistan, Azerbaijan, and Iran.
While the Volga’s inflow increased slightly to 232 cubic kilometers in 2024, it remains insufficient to reverse or even stabilize the sea’s decline.
Experts agree that regional cooperation and a coordinated, long-term strategy for water resource management are essential to confronting this environmental crisis.
