Proposed withdrawal of Song Tranh 2 lake for inspection

Earthquakes continued in Song Tranh 2 with increasing intensity and increasing frequency. 'It is impossible to sit down and discuss water storage or water storage. The immediate problem of scientists is to determine soon whether this is an earthquake or an earthquake due to tectonic faults in the area that causes a countermeasure. ' - Mr. Dinh Van Thu, Vice Chairman Chairman of Quang Nam Provincial People's Committee proposed.

Proposed withdrawal of reservoir water for monitoring

At the meeting with leading experts in the working group of Minister of Construction Trinh Dinh Dung on the afternoon of November 16, Vice Chairman of Quang Nam People's Committee Dinh Van Thu raised the issue of continuous earthquakes with the houses. science.

Mr. Thu said: 'Scientists claim that this is an earthquake triggered by the accumulation of the Song Tranh 2 hydropower reservoir and will gradually decrease in the coming years.'

The earthquake of 4.6 magnitude on October 22, scientists of the Institute of Geophysics also confirmed that this is the biggest earthquake in the region. In the coming time, if an earthquake occurs, it will not exceed 4.6 richter.

But the earthquake on the afternoon of November 15 has reached 4.7 richter scale. So how do scientists' claims about Song Tranh earthquake be understood? Panic people worry and do not believe in scientific conclusions are valid.

Song Tranh 2 reservoir cannot drain water for earthquake study as proposed.

So we expect scientists to continue to study whether this is an earthquake or an earthquake because tectonic fault takes place underground.

Concurrent with Mr. Thu, Quang Nam Provincial Party Committee Secretary Nguyen Duc Hai also raised the issue to clarify whether this is an earthquake stimulating or earthquake due to the fault of natural tectonic in the area.

If the earthquake stimulates, it will gradually decrease after time as the scientists claim. But earthquakes are increasing and with great and complex vibration intensity. Therefore, a deeper and deeper study of earthquakes in Song Tranh 2 is needed.

When placing this earthquake issue before scientists, Mr. Thu 'made a plan' : We can do the method of analogy. That means we drain the Song Tranh 2 reservoir to see if the earthquake happens again? If the reservoir water is drained and the earthquake still occurs, it is obviously not a stimulating earthquake.

Is it possible to draw water from Song Tranh 2 reservoir?

The earthquake on November 15 cracked down the Song Tranh 2 operator's wall and fell down to the tile houses of Tra Son and Bac Tra My.

Irrigation engineer Nguyen Minh Tuan, now Chief of the Office of the Quang Nam Flood and Storm Control Board, affirmed that all the reservoirs have been drained without having to break the main dam, which can often be done by embankment of dykes through the main dam site and dig a drainage route.

However, the Song Tranh 2 hydropower reservoir cannot be implemented by any means except by using a large capacity pump to absorb water throughout the day and night.

Explaining about the inability to drain the Song Tranh 2 reservoir, Mr. Tuan explained: In the construction of the Song Tranh 2 hydropower dam, there is no construction of a deep discharge outlet. Therefore, the reservoir water cannot be drained when necessary.

Topography of two sides of high cliffs, dams are horizontal, with the depth of lake from the bottom to the top of the dam nearly 200 m, so it is impossible to build dykes to open new flows on the shoulder of the dam. This is unbelievable.

Currently, Song Tranh 2 water level remains at the dead water level of 140m. The accumulation of water does not affect the capacity of electricity generation. This is evident in the report of the Song Tranh 2 Hydropower Management Board that the power output has been integrated into the national grid for nearly two years.

According to irrigation experts, draining of Song Tranh 2 reservoir is impossible except to break the main dam to discharge water. If you put the large-capacity pumps to smoke around the day and night, it is more than 270 million m ^3, also because the water flow is continuous.

Thus, the proposed and constitutional comments of the Vice Chairman of Quang Nam Provincial People's Committee Dinh Van Thu to clean up Song Tranh 2 hydropower reservoir to monitor earthquakes is not possible without breaking the main dam.

At the meeting with Quang Nam local authorities and scientists, leading experts, Minister Trinh Dinh Dung said that in order to continue studying the Song Tranh 2 earthquake in the coming time, there was no other way. It is necessary to invite leading experts in earthquake industry of India, Russia, Japan . together with modern machinery to be able to study accurately.

In addition to inviting experts, Mr. Dung requested the leading experts, scientists of the Ministry of Construction to focus on researching houses and public works with high seismic resistance but with the requirement of cost. new rational can help people in the earthquake area to live peacefully.