Song Tranh hydropower is prone to landslides and landslides

According to research results of the Institute of Geophysics, frequent earthquakes can increase the geological risk of Song Tranh 2 hydropower area such as landslides, soil cracks and flash floods.

>>>Survey set up earthquake monitoring station in Quang Nam

In the afternoon of May 7, Professor Cao Dinh Trieu, expert of the Institute of Geophysics, published the results of the study on geological hazards at Song Tranh 2 hydropower project, in the workshop of sustainable hydropower development. out in Quang Nam.

Statistics from the Institute of Geophysics, from the end of 2010 to now, the network of observation stations in Hue and Binh Dinh has recorded 10 stimulus earthquakes occurred in Song Tranh hydropower area 2. Trieu cho professor that, earthquakes only appear after hydropower charges.

Prof. Cao Dinh Trieu, expert of Geophysical Institute presented the research results
Geological hazards in Song Tranh hydropower project 2 pm 7/5. (Photo: Tri Tin)

Accordingly, earthquakes in Song Tranh 2 are earthquakes that stimulate rapid reaction at shallow depths (less than 10km). This area may have the strongest earthquake of approximately 5.5 to 6.1 degrees Ritcher. According to Professor Trieu, if a strong earthquake occurs in the reservoir, the risk of creating a large wave column directly impacting on the dam body is very dangerous.

"Frequent earthquakes can cause environmental changes of the existing fault zone, increasing the risk of other geological hazards such as landslides, soil cracks, flash floods" , Professor Trieu said.

Subsidence point, landslide on the left shoulder of Song Tranh hydropower dam 2- a clear proof of the ear
Exciting earthquake geological variables in the area of ​​Song Tranh 2 hydropower project (Photo: Tri Tin)

The Trieu professor proposes to set up a fixed seismic network around the Song Tranh 2 hydropower reservoir area to be able to track earthquakes from 1 degree or more. Minimize the rapid fluctuation of lake water level. Develop a system to monitor, alert and raise community awareness to respond to geological disasters in time.

Last March, the phenomenon of water leakage at Song Tranh 2 hydropower dam has worried thousands of households in Quang Nam and the concern of many scientists. Quang Nam province has a plan to review hydroelectric dams in the area to ensure safety.