Sinkholes identified in 6 NegOcc areas-A A +A
Monday, November 4, 2013
THE Mines and Geosciences Bureau Region 6 (MGB-6) has identified six towns and cities in Negros Occidental where occurrence of sinkholes, which could endanger people’s lives and properties, is a possibility.
MGB-6 Regional Director Leo Van Juguan said that areas with danger of occurrence of sinkholes are those that have limestone deposits.
These are places in the hinterland areas of Kabankalan City and Cauayan town in southern Negros and in Sagay City, Escalante City, Toboso and Calatrava towns in northern Negros, based on the mapping that the MGB conducted in the province.
A sinkhole is a natural depression or hole in the ground caused by some form of collapse of the surface layer.
“We are closely monitoring these areas,” Juguan said in a radio interview.
At this time, however, no sinkhole was detected in the surface of the said areas, he added.
Almost 100 sinkholes were found in Bohol after the 7.2 magnitude quake last Oct. 15.
Juguan explained that sinkholes usually develop underground in caves. The formation of sinkholes involves natural processes of erosion or gradual removal of slightly soluble bedrock (such as limestone) having calcium carbonate by percolating water, collapse of a cave roof, or a lowering of the water table.
In Bacolod, Juguan said they have not identified any area having limestones so the occurrence of sinkholes in the city is remote.
He noted that sinkholes especially in urban areas are dangerous especially if houses and other properties lie on its surface.*
Published in the Sun.Star Bacolod newspaper on November 04, 2013.