On the morning of July 23, flood water flowing into Ban Ve Hydropower Plant decreased significantly compared to last night.

At midnight on July 23, the total flood water flowing into Ban Ve Hydropower Plant was more than 12,000m³/second, but by this morning it had receded to only about 6,000m³/second.

Flood water at Ban Ve Hydropower Plant. Photo: NGUYEN LONG

According to data from the automatic water level reporting system at hydroelectric reservoirs of Vietnam Electricity Group (EVN), this morning, July 23, the water level at Ban Ve hydroelectric reservoir ( Nghe An province) rose rapidly to 199.72m - approaching the normal water level of 200m.

From the night of July 22 to the early morning of July 23, the lake experienced a short-term flood peak with the total water flow at 0:45 a.m. reaching more than 12,000 m³/second (previously at 0:00 a.m. it was more than 10,000 m³/second. However, by 8:00 a.m. this morning, the flood water flow into this lake had decreased significantly, now only about 6,680 m³/second.

Despite the sudden increase in water flow, the upstream water level is still below (close to) the design threshold (normal water level). This hydropower plant is maintaining 6 surface discharge gates but controlling the overflow discharge at about 4,200m³/second.

Ban Ve is the largest reservoir in the North Central region, located on the Nam Non River in Nghe An province, with a total capacity of nearly 1.9 billion m³ and a basin area of more than 8,700 km². Because most of the basin area is located in Laos, the flow fluctuations are often rapid and unpredictable. However, hydrological signals show that the amount of water flowing into the lake this morning is showing a decreasing trend.

Nam Non is a tributary of the Ca River. The Ministry of Agriculture and Environment (MARD) has just sent a document to the People's Committees of Nghe An and Ha Tinh provinces regarding ensuring the safety of dykes in response to major floods on the Ca River. Forecasts from the National Center for Hydro-Meteorological Forecasting show that from now until July 25, a major flood will occur on the Ca River, with the peak of the flood likely to exceed alert level 3.

The Ministry of Agriculture and Environment requests localities to strictly implement previous dispatches of the Prime Minister and the Ministry of Agriculture and Environment, urgently inspect and protect dikes at vulnerable points and unfinished construction works, and prepare adequate human resources and rescue equipment according to the "4 on-site" motto.

Local authorities along the Nam Non and Ca rivers need to monitor weather information, proactively protect dykes, and prevent floods.

ANGEL

Source: https://www.sggp.org.vn/sang-23-7-nuoc-lu-do-ve-thuy-dien-ban-ve-giam-dang-ke-so-voi-dem-qua-post805016.html