Water is being released from the Ban Ve hydroelectric reservoir to cope with Typhoon No. 9.
Given the complex developments of Typhoon No. 9 and the risk of major flooding in the Ca River basin, on September 23, 2025, the Civil Defense Command of Nghe An province issued an order to operate the Ban Ve hydroelectric reservoir to ensure the safety of the structure and minimize damage to the downstream area.
According to the Operation Order, the Head of the Civil Defense Command of Nghe An province issued Official Letter No. 931/BCH dated September 23, 2025, requesting the Director of Ban Ve Hydropower Company to implement the operation of releasing water from the reservoir downstream with a flow rate of 400 m³/s to 800 m³/s, starting from 8:00 AM on September 24, 2025. The objective is to proactively lower the reservoir water level to prepare for the large flood that is likely to occur from the afternoon of September 25 to the morning of September 26.
Specifically, according to forecasts, in the next 24 hours, the water flow into the Ban Ve hydropower reservoir could reach 250-300 m³/s, and may increase to 800 m³/s from September 25th.
If, during operation, the water inflow into the reservoir increases above 1,000 - 1,200 m³/s or the water levels at the Con Cuong and Cho Trang hydrological stations exceed alarm level II, Ban Ve Hydropower Company will have to adjust the operating regime to cut and reduce flooding downstream, in accordance with the regulations in the Inter-Reservoir Operating Procedure approved by the Prime Minister.
Notably, if the reservoir water level reaches 200m, the company must gradually adjust the discharge flow to balance with the inflow of floodwaters, ensuring the safety of the structure. When meteorological and hydrological conditions return to normal, specifically when the inflow into the reservoir decreases below 1,000 m³/s and the forecast for the next 10 days does not predict weather patterns causing heavy rain or floods, the reservoir will return to normal operating mode.
The Provincial Civil Defense Command also requested specialized agencies such as the Department of Agriculture and Environment, the Department of Industry and Trade, and other relevant units to strengthen supervision and inspection of the implementation of the operational order, ensuring compliance with regulations and minimizing potential damage to the downstream area.
Residents in downstream communes are advised to closely monitor official information from authorities and proactively prepare for and respond to any adverse situations that may arise.
This is an important and timely step in disaster prevention and control, and in protecting the lives and property of the people in Nghe An province.
