Updated image of Ban Ve Hydropower Plant's operation status at 4:22 p.m. on July 22 - Photo provided by EVNGENCO1
According to EVNGENCO1, this flood in the Ban Ve reservoir basin had a peak flow of up to 12,800 m³/s - exceeding the frequency of flood checks according to the design of the project (10,500 m³/s). However, thanks to flexible and timely management measures, the reservoir only discharged 3,285 m³/s through the project, thereby reducing the peak flow by 74%, greatly reducing pressure on the downstream area.
The flood began to appear at 4:00 a.m. on July 22 with a flow of 583 m³/s, then increased rapidly and reached 1,500 m³/s at 10:00 a.m. the same day. At 4:00 p.m., following the regulation order from the Steering Committee for Natural Disaster Prevention, Search and Rescue and Civil Defense of Nghe An province, the reservoir began to regulate the discharge with a total flow of 845 m³/s, of which the flow through the spillway was 508 m³/s.
At 2:00 a.m. on July 23, the flood peaked at 12,800 m³/s. In this emergency situation, Ban Ve Hydropower Company proactively adjusted the operating plan from "ensure construction safety" mode to "abnormal operation" mode, based on the report and approval of the Chairman of Nghe An Provincial People's Committee. The goal is to minimize water discharge and continue to minimize the serious flooding occurring downstream.
Despite facing a flood of great scale and intensity, Ban Ve Hydropower Company has safely operated the headworks, effectively contributing to disaster prevention and control, protecting the safety of people and infrastructure in the downstream area.
Anh Tho
Source: https://baochinhphu.vn/thuy-dien-ban-ve-van-hanh-an-toan-trong-tran-lu-lich-su-cat-giam-74-luu-luong-lu-ve-ha-du-102250723104352981.htm
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