CEBU CITY, February 10 (PIA) -- Responding to the need of site assessment on the reported earthquake-induced landslide incidents, Mines and Geosciences Bureau (MGB-7) deployed a team of geologists and mining engineers immediately to Negros Oriental specifically in the areas badly hit by the February 6 earthquake.
MGB-7 regional director Loreto Alburo said this developed after many areas reportedly were affected by the earthquake-triggered landslides following a 6.9 magnitude earthquake that hit the Visayas region.
In its inspection on February 7, the team noted an artificial dam or building up of water in two sites along Tinayunan River in Barangay Tinayunan Beach in Guihulngan City.
It immediately recommended the evacuation of residents downstream of river including evacuees at Tent City in Barangay Tinayunan Beach due to the possibility that the artificial dams could collapse.
MGB-7 has identified 39 barangays in La Libertad and Guihulngan, Negros Oriental with high and moderate landslide susceptibility ratings on its rain-induced geological assessment.
Alburo urged local government officials to revisit the geo-hazards threat advisory that MGB distributed to them in 2009.
Following the 2009 geological assessment report in Guihulngan City, five barangays--Humayhumay, Imelda, Mabunga, Sandayao, and Tacpao have high susceptibility to landslide. Barangay Binobohan has moderate to high susceptibility to landslide.
There are eleven barangays in Guihulngan with moderate susceptibility to landslide and these are Bakid, Banwaque, Calamba, Calupa-an, Linantuyan, Mabunga, Maniak,Plagatasanon, Planas, Trinidad, and Villegas.
In La Libertad MGB-7 identified nine barangays with high landslide susceptibility which are Aniniaw, Aya, Biga-a, Guihob, Kansumandig, Mambutod, Managondong, Pangca, and Pitogo.
Barangay Mandapaton has moderate to high susceptibility to landslide. Eleven barangays with moderate susceptibility to landslide are Manluminsag, Busilak, Cantopa, Elecia (Talostos), Eli, Manghulyawon, Martilo, Nasungon, San Jose, Solongon, and Tala-on.
“Although it was a rain-induced assessment, we are seeing now a similar occurrence in an earthquake-induced landslides or ground failure,” Alburo added.
Earthquakes can produce slope instability, tension cracks and fractures that may enhance the vulnerability to landslides.
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