On October 1, Tuyen Quang Hydropower Company sent a document to the Ministry of Agriculture and Environment, the Department of Dyke Management and Natural Disaster Prevention and Control, requesting to close 1 bottom spillway of Tuyen Quang Hydropower Reservoir.
Accordingly, at 5:00 a.m. on October 1, the upstream water level of Tuyen Quang Lake was 119.87 m, the water flow into the lake was 4737 m3/s, the water flow out of the lake was 5693 m3/s (of which the water flow through 8 spillways was 4991 m3/s; the water flow through 3 generators was 699 m3/s).
With the current water flow and discharge status, it is expected that by 7:00 a.m. on October 1, the lake water level will be about 119.63m.
Meanwhile, at 7:00 a.m. on October 1, the water level of the Lo River at Tuyen Quang hydrological station was 25 (19m above alert level 2). Floods on the Lo River will continue to rise, forecast in the next 12 hours, the water level on the Lo River at Tuyen Quang station will be above level 2 - level 3.
On that basis, Tuyen Quang Hydropower Company proposed that the Ministry of Agriculture and Environment allow the closure of one of the project's floodgates to reduce the water level of the Lo River while still ensuring the safety of the Tuyen Quang hydropower project.
Tuyen Quang Hydropower Company will regularly monitor the flow to the lake and promptly report to the Ministry of Agriculture and Environment when unusual situations occur.
Previously, on September 29 and 30, due to the impact of heavy rain, Tuyen Quang Hydropower Plant had to open all 8 bottom spillways, causing the water level on the Gam and Lo rivers to rise and flood in many areas.
Tuyen Quang Hydropower Plant in Na Hang District (Tuyen Quang Province) was built at the end of 2002 and officially inaugurated and connected to the national grid in 2008. The large reservoir area stretches over 8,000 hectares in the upper reaches of the Gam and Nang rivers.
with a capacity of 342 MW, the average annual electricity output is nearly 1.3 billion kWh. This is the 5th largest hydropower project in the North that plays an important role in flood control and water regulation for downstream areas.
