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| Landslide causing traffic congestion on National Highway 49 through A Luoi 5 Commune. Photo: Van Hai |
Accordingly, based on the water level of the Huong Dien Hydropower Reservoir at 1:30 PM on November 16, which was +53.74m (normal high water level is +58m), the inflow to the reservoir was 1,321 m3/s, and the water discharge downstream was 522 m3/s. To ensure the safety of the dam and the downstream area, the authorities requested an adjustment to gradually increase the regulated discharge of the Huong Dien Hydropower Reservoir through the spillway and turbines, avoiding sudden surges, with a flow rate ranging from approximately 800-1,500 m3/s. The operation will be adjusted depending on the actual inflow situation. The time for gradually increasing the flow rate was set for 4:00 PM on the same day.
The City Civil Defense Command requested the Huong Dien Hydropower Joint Stock Company to issue notifications, warning sirens and loudspeakers for the downstream areas, and closely monitor the inflow to the reservoir and the water level of the Bo River at the Phu Oc station. Communes and wards in the downstream areas of the Huong Dien Hydropower Reservoir are strictly prohibited from boat activities, collecting firewood, fishing, etc., and must inform people to proactively take precautions.
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| Binh Dien Hydropower Reservoir was requested to increase its regulated discharge on the afternoon of November 16 |
On the same afternoon, the City Civil Defense Command also issued an order to regulate the operation of the Binh Dien Hydropower Reservoir on the Huong River basin. The water level of the Binh Dien Hydropower Reservoir at 2:45 PM on November 16 was +78.85 m (normal high water level is +85 m), the inflow to the reservoir was 1,035 m3/s, and the water discharge downstream was 520 m3/s. The authorities requested an adjustment to gradually increase the regulated discharge through the spillway and turbines, avoiding sudden surges, with a flow rate ranging from approximately 850-1,500 m3/s. The operation will be adjusted depending on the actual inflow situation. The time for gradually increasing the flow rate was set for 7:00 PM on the same day.
According to the City Hydrometeorological Station, from November 16 - 18, Hue will continue to experience heavy to very heavy rain. The total rainfall in the lowland areas is generally 150-300 mm, with some areas exceeding 400 mm; in the mountainous areas, it is 200-400 mm, with some areas exceeding 500 mm.
On November 16, the mountainous area of A Luoi experienced very heavy rain, concentrated in A Luoi 2 and 3 communes, leading to localized flooding and a high risk of landslides.
Mr. Phan Duy Khanh, Chairman of the People's Committee of A Luoi 2 commune, stated that the heavy rain caused localized flooding on some sections of the Ho Chi Minh Highway and inter-village/commune roads, with soil and rocks spilling onto the road surface. Additionally, some spots in Pi Ay2, A Bar Nham, and Dien Mai hamlets showed a risk of landslides. The commune mobilized forces to set up barriers and guards at the flooded sections, and prepared plans to evacuate people in necessary situations at high-risk landslide areas.
Furthermore, at Km76+300 on National Highway 49 passing through A Luoi 5 commune, a landslide occurred on the uphill slope, with a large volume of soil, rocks, and trees spilling onto the road surface, causing traffic congestion.