Water levels of hydroelectric reservoirs in the North on November 9

Yên San |

Hydropower reservoirs in the North are flexibly operated according to flood developments, ensuring safety for downstream areas.

As of 9:00 a.m. on November 9, 2025, according to an update from Vietnam Electricity Group, Hoa Binh Lake recorded upstream water levels at elevation of 116.31 m; water flow to the lake reached 1,278 m3/s; total discharge was 701 m3/s.

Implementing the inter-reservoir operation process in the Red River basin, Hoa Binh Hydropower Plant closed 1 bottom spillway gate at 9:00 a.m. on November 8, 2025 to stabilize downstream flow. After closing the spillway, the water flow downstream is about 2,100m3/s.

At Tuyen Quang Lake, by 9:00 a.m. on November 9, the upstream water level reached 118.91 m; the water flow to the lake reached 378 m3/s; the total discharge was 587.37 m3/s. Implementing the inter-reservoir operation process in the Red River basin, Tuyen Quang Hydropower Plant opened 1 bottom spillway gate of Tuyen Quang Hydropower Plant at 10:00 a.m. on November 5, 2025.

As of 9:00 a.m. on November 9, Son La Lake had an upstream water level of 216.3 m; water flow to the lake was 698 m3/s; total discharge was 352 m3/s. Currently, the unit has closed all bottom spillways, only maintaining power generation through generators to regulate the flow downstream.

A similar situation occurred in Lai Chau Lake, where the upstream water level reached 295m; the water flow to the lake reached 785m3/s; the total discharge was 785m3/s. Currently, Lai Chau Hydropower Plant maintains the closure of all bottom spillways, only operating power generation.

As of 9:00 a.m. on November 9, Thac Ba Lake had an upstream water level of 58.06 m; the water flow to the lake reached 502 m3/s; the total discharge was 321.52 m3/s. Thac Ba Hydropower Plant is maintaining an open gate for facial discharge.

In the context of complicated heavy rain, the flexible operation of hydroelectric reservoirs, ensuring safety downstream is considered a key factor in natural disaster prevention in the North.

According to the National Center for Hydro-Meteorological Forecasting, at 7:00 a.m. on November 9, the center of Typhoon Fung-Wong was at about 14.3 degrees north latitude; 124.9 degrees east longitude, in the sea east of the central Philippines. The strongest wind near the storm center is level 15 (167 - 183 km/h), gusting over level 17. The storm is moving west-northwest at a speed of about 30 km/h.

It is forecasted that in the next 24 hours, the storm will continue to move west-northwest, about 25 km/h, entering the East Sea as storm No. 14.

Forecast of impacts at sea, in the eastern sea area of the northern East Sea, strong winds of level 6-7, then increasing to level 8-10; near the storm's eye, level 11-13, gusting to level 16. The waves are 4-6 m high, then increase to 6-8 m; the area near the storm's eye will have waves 8-10 m high. The sea is rough.

During November 10-12, this area will continue to be affected by strong storm winds of level 11-13, gusts of level6; waves 8-10 m high; rough seas.

All ships operating in the danger zone are at high risk of being affected by thunderstorms, whirlwinds, strong winds and large waves.

Yên San
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