||The “Tigrovaya balka” nature reserve is exceptional in the planet thanks to its unique communities of Tugay flora and fauna. The natural ecosystems of the reserve were supported by annual spring-summer floods and lakes until the construction of the Nurek Hydropower Station (HPS) on the Vakhsh River. The hydropower plant has unfortunately led to the gradual reduction of water levels in the reserve's lakes and to the full disappearance of the Blue and Kabanae lakes. Of greater concern is that currently agricultural sewage water is being directed to the reserve, and its lakes to compensate the freshwater losses and maintain the water balance. This represents a serious threat to nature in the area, particularly to its unique Tugay vegetation. To guide remediation measures, this project aims at documenting the environmental risks posed by the inflow of contaminated water to the reserve and its lakes, to establish the environmental damage already caused; to identify the main sources of pollution and areas that require immediate action and to establish the use made of the reserve's water.