While the flood water has not yet been withdrawn, the people who have not yet panicked with the cataclysm caused a new and more severe disaster, the more rushing up and downstream flooding.
2010 - Phu Yen, Khanh Hoa: Floods and floods
In recent times, prolonged heavy rain caused the Central region to fight against floods. Next to that, the Southern Central provinces continue to face a historic flood when at least 17 people have died as a result of floods in this area.
According to the Central Hydrometeorological Center, the South Central region will continue to have heavy rain lasting for the next few days. It is forecasted that in the night of November 3 and November 4, the flood of rivers from Thua Thien Hue to Khanh Hoa will likely rise again and stay at the level of 1 - 2.
Ba river hydropower plant Lower flood discharge with a flow of 7000m3 / s.
While the flooding situation is still very complicated, from the afternoon of November 2, three large hydropower reservoirs in Phu Yen include the hydroelectricity of Ba Ha River, Hinh River, Krong H'Nang and Ba La Irrigation ( Gia Lai) has simultaneously flooded with a flow of over 10,000 m3 / s, making TP. Tuy Hoa, Dong Hoa, Tay Hoa and Phu Hoa were submerged in floods. People in these areas are facing the risk of a historic flood, the rivers are starting to rise rapidly, causing widespread separation and flooding. The whole province had to evacuate more than 4,000 people.
In Dong Hoa district, about 400 households in My Thanh and Ngoc Lam villages were completely isolated due to flooding from upstream. Many inter-village and inter-commune roads are nearly 1 meter deep.
In Phu Hoa district, the flood water quickly made many people unable to return to their hands, where the water level was approximately equal to the floor. Nearly 500 households in Team 1 and Team 2 in Phuoc Lanh village are struggling with local flood risks. The district government had to mobilize more than 7,000 sand bags to flood the flood while organizing evacuation for 622 households with 2,260 people from flooded areas.
Under this situation, provincial leaders are concerned that if the flood discharge is not controlled, Phu Yen will face the risk of flooding because it was previously in November 2009, Song Ba hydropower reservoir only discharged flood with storage. At 1,400m3 / s, after half a day, Tuy Hoa city was flooded and after a day reached the historic flood peak in 2003.
In Khanh Hoa, floods on the rivers have peaked. Currently 8/10 reservoirs in Khanh Hoa are flooding, making most areas in the area flooded from 0.5 to 1.5 m.
2009 - A Vuong hydroelectric plant "submerged" Quang Nam
In early October 2009, the typhoon No. 9 (Ketsana) struck heavily in the central provinces. At the same time, the people of Quang Ngai were faced with a terrible flood when nearly 150 million cubic meters of A Vuong hydroelectric dam was discharged, causing hundreds of thousands of people in the downstream of Vu Gia and Thu Bon rivers not to keep up. hands, water flooded. The water level on Vu Gia River surpasses the flood peak in 1999 to 1.5m.
Panorama of flooding in Quang Nam on September 30. (Photo: Getty Image)
Starting at 14:00 on September 29, 2009, amid the storm Ketsana began to land in the Central provinces, A Vuong hydropower began to discharge with a flow of 1,000 m3 / s and then increased to 3,000m3 / s. at 17h the same day.
After only 6 hours, floods on Vu Gia - Thu Bon rivers surpassed the alarm 3 by 2m, more than 30,000 Dai Loc households were submerged by floodwaters.
Even on the night of September 29 and September 30, floods flooded and made QL1A seriously congested. In Que Son district, floodwaters have flooded the road surface about 1.5m, causing hundreds of vehicles from the South to go out and the North to be stuck here, the traffic jam is km.
On September 30, in Hoi An, the water level was measured in areas of Cam Kim, Cam Nam, Cam Pho wards . flooded to more than 3 meters, with the historic flood peak in 2007. The Flood and Storm Control Committee must direct urgently evacuate people to high and safe places.
Hoi An ancient town flooded with water on September 29. (Photo of VTC)
After more than half a month of floods and storms, the functional departments of Quang Nam province just sat down to search for the culprit, a fierce debate broke out between one side of A Vuong Hydropower Joint Stock Company and the provincial leader. Quang Nam.
On October 17, Tien Phong newspaper quoted Mr. Nguyen Thanh Quang - Director of Quang Nam Department of Agriculture and Rural Development ' I affirmed that A Vuong hydropower discharge immediately in September 29 and 30, which "contributed" to causing severe flooding. downstream area, namely Dai Loc district '.
Newspaper PL HCMC also cited the opinion of Quang Nam's leadership that the provincial leaders only allowed flood discharge for more than 4 hours, then A Vuong hydropower discharge to 2 days 2 nights.
In response to the above comments, Mr. Nguyen Van Le - Chairman of A Vuong Joint Stock Company, affirmed: ' A Vuong hydroelectricity has nothing wrong in the operation of flood discharge in the past 9 storm. On the contrary, thanks to the A Vuong hydropower dam, the downstream is only partially flooded . '
Mr. Le cited, the flood discharge in A Vuong hydropower plant in the two days of 29 and 30/9 is only 1/14 of the flow of water flowing to Vu Gia and Thu Bon streams. In addition, Mr. Le also said that the regulation of flood in A Vuong Lake is limited, because the lake surface is only 9.1km2 which is too small, at the height of only 199 million m3, the flood discharge is necessary.
Meanwhile, Mr. Quang continued to harshly: ' Discharging the flood in accordance with the process but causing damage to the downstream area, what do you say? The main problem is how to discharge so that people can reduce suffering '.
The ' experience ' session ends with the conclusion that it will wait for the official conclusion from the Central Steering Committee for Flood and Storm Control.
2007 - Rao Quan flushed water, Quang Tri spilled
On the night of October 3, 2007, Quang Tri had completely stopped the rain, the water began to withdraw from the impact of the previous storm No. 5, but on the morning of October 4, the floodwaters suddenly surged unexpectedly. causing thousands of households to be submerged in floods.
Although not rainy, Trieu Phong district is still surrounded by flood waters on all sides. (Photo: Internet)
Trieu Phong district is the most affected area. In Dai Hoa village (Trieu Dai commune), the inter-village road was sunk deeply into the water, making travel of people completely blocked, hundreds of hectares of winter-crop vegetables were mainly sweet potatoes and peanuts being submerged by flood water. , lost white.
Quang Dien hamlet suffers a similar situation, inter-village roads have a flooding area of nearly 1m, people have to turn water by boat to move.
When investigating the cause of the unusual occurrence of floods, it is known that during the rainy and stormy days, Rao Quan hydropower has discharged water in the lake at a speed of 200m3 / s. The volume of discharge water is about 15 million m3. This is the reason why the water level in the downstream of Thach Han River is high.
However, it is worth mentioning that before the flood discharge, the authorities did not give specific information to the people but only distributed information on local television, while due to the impact of the storm, the households in the above-mentioned area remained no electricity back yet.
The flood discharge to avoid dam break, embankment is perfectly reasonable, but should this work be carefully calculated, not merely interested in massively flooding upstream, leaving the population down. Travel hard to fight flooding.