‘Check flood-prone areas’

THE Department of Environment and Natural Resources (DENR) 7 urged organizers of the Asia-Pacific Economic Cooperation (Apec) Summit in Cebu to review geohazard maps to determine areas and routes that are considered flood-prone.

Dr. Eddie Llamedo, DENR 7 spokesperson, said they have provided local government units, even barangays, with updated geohazard maps, which show areas in their jurisdictions that are vulnerable to flooding.

Llamedo said that with the rainy season, they continue to reiterate geohazard threat advisories to LGUs especially in the cities of Cebu and Mandaue.

Llamedo identified Barangays Mabolo, Kasambagan, Salinas Drive in Lahug, Kinasang-an, Labangon and Bonbon in Cebu City as critical areas for flooding.

Mandaue City

In Mandaue City, identified as “critical areas” for flooding are Barangays Subangdaku, Mantuyong, Umapad, Opao, Alang-Alang, Guizo and Paknaan.

Llamedo said the frequent flooding that occurs in downtown Cebu City is due to garbage clogging drainage facilities, heavy siltation and illegal structures in canals that serve as natural waterways.

Llamedo also blames the deteriorating carrying capacity of drainage facilities for why flooding persists.

Llamedo said that even before preparations for the Apec summit began, they have been reminding LGUs in Metro Cebu to check their flood-prone areas.

With flooding threatening some parts of Metro Cebu, Llamedo urged LGUs to consider putting up flood mitigation measures such as small water impounding dams (SWIDs) in upland areas and water catchment areas in lowland areas.

Llamedo urged barangays to regularly desilt waterways as a way to make them more efficient against flooding.

He also urged Apec organizers, especially those involved in the routes for delegates, to coordinate with LGUs so that they can devise possible rerouting schemes in case of flooding.

Cebu City

In Cebu City, Mayor Mike Rama is eyeing to implement three flood control projects, which include the construction of a flood retarding basin at the North Reclamation Area (NRA), part of the city that is flood-prone.

Flood retarding basins are holding ponds that temporarily store some or all rainwater runoff from a catchment.

Rama identified the lower portion of Block 27, a city-owned property in NRA, as an area where the flood retarding basin will be built.

The upper portion of the property will still be converted into a public park and open space that can be used as evacuation area when disasters hit the city.

He said the matter was suggested by Department of Public Works and Highways (DPWH) Sec. Rogelio Singson when they discussed the city’s flooding problem.

Rama said he will ask the DPWH to fund the project and will also ask SM Prime Holdings to help since they usually get affected when NRA is flooded.

Rama will also tap the help of Engr. Felipe Cruz Jr., owner of the construction company, to help the city in coming up with a proof of concept for “drainage boring,” or a system which will be installed underneath roads.

If feasible, Rama said, drainage boring will apply in the entire city.

Concept

The proof of concept is at no cost to the city, but the city will still tap DPWH for its implementation.

Aside from it, Rama said, the City will also be requiring owners of new buildings to build underground catchment in their structures.

He said an ordinance on the matter should be passed before the council to compel building owners to comply with the requirement.

u201cThey will not just construct cisterns, but as well as underground retention or underground catchment basins,” Rama added.

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