According to the bulletin of the National Center for Hydro-Meteorological Forecasting on July 21, on the Thao River, the water level at Yen Bai station is decreasing, while at Phu Tho station it is changing slowly and tending to decrease.
On the Lo River, the water level at Tuyen Quang and Vu Quang stations fluctuates due to the influence of upstream hydropower regulation. The flow to Hoa Binh reservoir on the Da River also continues to fluctuate according to the regulation of upstream hydropower stations.
At 7:00 AM on July 21, the water level of the Thao River in Yen Bai was 26.28 m, in Phu Tho 13.17 m; the Lo River in Tuyen Quang 15.73 m, in Vu Quang 8.42 m. The water level downstream of the Red River at Hanoi station reached 3.76 m and is forecast to continue to fluctuate according to the upstream hydropower regulation and the impact of tides.
In the Thai Binh River area, the water levels of the Cau, Thuong and Luc Nam rivers continue to change slowly, fluctuating according to the influence of tides. In the next 36 hours, the water level of the Thai Binh River at Pha Lai station is forecast to be highest at 1.50 m, lowest at 0.90 m.
In the North Central region, the water levels of the Ma, Ca, La, Gianh and Huong rivers mainly change slowly or fluctuate according to reservoir regulation and tides. At 7:00 AM on July 21, the water level of the Ma River at Giang station was 1.09 m; La River at Linh Cam was 0.49 m; Gianh River at Mai Hoa was 0.53 m; Huong River at Kim Long was 0.52 m.
In the South Central region, the water level of the Vu Gia - Thu Bon and Tra Khuc rivers continues to change slowly or fluctuate according to tides, regulating reservoirs. The Kon River at Thanh Hoa station fluctuates according to the operation of irrigation works. The water level at this station at 7:00 AM on July 21st is 6.73 m.
In the Southeast region, the water level of the Dong Nai River at Ta Lai station continues to fluctuate according to upstream reservoir regulation. The water level at 7:00 AM on July 21st was 11.079 m. The Be River at Phuoc Hoa station fluctuates according to the reservoir regulation, with a water level of 1.938 m.
In the Mekong River basin, the water level of the Krong Ana River changes slowly in a downward trend. At 7:00 AM on July 21, the water level at Giang Son station was 41.488 m. The water level of the Dak Bla River at Kon Tum station was 51.521 m, continuing to fluctuate according to the regulation of hydropower reservoirs.
At the headwaters of the Mekong River, the water level fluctuates according to the tide. The highest water level on July 20th on the Tien River at Tan Chau station is 1.93 m, on the Hau River at Chau Doc station is 2.01 m. As of July 25th, the forecast daily highest water level on the Tien River at Tan Chau is 1.65 m, and on the Hau River at Chau Doc is 1.75 m.
