After the peak, the flood tended to decrease but remained high, fluctuating around 1,000 m³/s at 4:00 p.m. on May 30.
At the time of the flood, the water level of Ban Ve Hydropower Reservoir was at 183.1 m - 16.9 m lower than the normal flood level. Thanks to its large remaining capacity, the reservoir was able to store most of the flood water, significantly reducing pressure on the downstream area.
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According to calculations, the rate of reducing the peak flood flow of the reservoir reaches 93%. The amount of water discharged downstream is mainly water through the generators, ensuring the safety of the system and stabilizing the flow.
With its multi-purpose mission, Ban Ve Hydropower Plant is not only a power generation project but also plays the role of a solid “shield”, contributing to the safety of the downstream area during the flood season. Therefore, the operation and regulation of the reservoir is always put first, becoming a special concern of both local authorities and management units.
Ban Ve Hydropower Reservoir has a water surface area of over 5,000 hectares, with a total storage capacity of up to 1.83 billion m³. To ensure accurate and timely monitoring of water resources, since 2018, Ban Ve Hydropower Company has installed 13 automatic rain monitoring stations around the plant and reservoir area. At the same time, the company has proactively collected data from 22 hydrometeorological monitoring stations in Laos - the upstream country - thereby forming a comprehensive information system, effectively serving the operation of the reservoir, ensuring the safety of the project and minimizing flood damage to the downstream area.
Source: https://baonghean.vn/thuy-dien-ban-ve-dieu-tiet-lu-cat-giam-toi-93-luu-luong-dinh-10298634.html
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