The largest hydroelectric reservoir in the North Central region is operating, reducing downstream flooding.
(Baonghean.vn) - On the afternoon of August 17, the Steering Committee for Natural Disaster Prevention and Search and Rescue of Nghe An province issued an order to operate the Ban Ve hydropower reservoir to reduce flooding downstream.
According to information, at 7:00 a.m. on August 17, 2018, the water flow into Ban Ve Lake was 2,804 m3/s; Ban Ve Lake water level at 7:00 a.m., August 17, 2018 was 193.7 m. The lake is currently discharging through the generator and overflowing with a flow rate of 794.0 m3/s.
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| Two weeks ago, Ban Ve Hydroelectric Reservoir also operated flood discharge. Photo: Ho Phuong. |
It is forecasted that in the next 24 hours, the maximum water flow into the lake is likely to be at 3,800 to 4,000m3/s.
Therefore, the Head of the Steering Committee for Natural Disaster Prevention and Search and Rescue of Nghe An province ordered Ban Ve Hydropower Company to operate Ban Ve reservoir to discharge water through the project with a flow rate not greater than the flow rate to the reservoir to reduce flooding downstream (according to Article 7 of Decision No. 2125/QD-TTg dated December 1, 2015 of the Prime Minister).
Time to start operating increased discharge flow: 15:00, August 17, 2018. Discharge flow through the project: From 1,000 m3/s to 2,500 m3/s (Including the discharge flow through the spillway and the power generation flow through the generator). Of which, from 3:00 p.m. to 6:00 p.m. on August 17, 2018, the discharge flow reached 2,000 m3/s; From 7:00 to 10:00 on August 18, 2018, the discharge flow will gradually increase to 2,500 m3/S.
When the water level of Ban Ve Lake is close to the normal water level, Ban Ve Hydropower Company gradually increases the discharge flow so that when the water level of Ban Ve Lake reaches the normal water level, the water flow into the lake is equal to the water flow discharged through the project.
Affected by storm No. 4, mountainous districts of Nghe An province have experienced heavy to very heavy rain. Water from upstream has caused many communes and villages in the Western region to be isolated.
