JORDAN, Guimaras – The Environmental Management Bureau (EMB) of the Department of Environment and Natural Resources (DENR) has confirmed the presence of a sinkhole in Sitio Nagub-an, Barangay Sta. Teresa in Jordan town.
EMB senior geologist Catherine Tapalla said the sinkhole measures four meters in diameter after the technical personnel of the agency conducted an ocular inspection of the area last March 7, 2019.
“The depressed area at the small farmland in Sitio Nagub-an where the old water well with hand pump was located is an example of a sinkhole. It signifies that dissolution of limestone/any calcareous rocks is occurring in the area,” the EMB said.
The sinkhole developed after an old well with hand pump collapsed five years ago.
Tapalla said the sinkhole developed 85 meters away from a segment of Sta. Teresa village that is susceptible to karst (topography formed from the dissolution of soluble rocks such as limestone) subsidence hazard.
Ground subsidence due to sinkholes is one of the hazards present in karst terrain.
EMB recommended the backfilling of the said sinkhole to avoid accidents.
A signage indicating the occurrence of subsidence will be placed in the area.
Residents were encouraged to be vigilant of any unusual occurrences and to monitor the affected place and the nearby houses of sinkholes especially during prolonged rains and earthquakes.
The Environmental Management Bureau said residents near the sinkhole should evacuate during heavy and prolonged rains or during the occurrence of an earthquake.(From the Province of Guimaras/PN)