MANILA, Philippines - The Department of Public Works and Highways on Friday proposed the construction of retarding basins in low lying areas of Metro Manila including España Boulevard as a fix to the perennial problem of flooding.
DPWH Secretary Rogelio L. Singson said the construction of water retarding or detention basins is the most viable solution to reduce downstream flooding during rainy season.
Such basins are constructed to temporarily store some, if not all, of the rainwater run-off, to absorb and contain flooding in periods of high rain and pump it out later at regulated rate of flow to a level that can be safely carried by nearby rivers or esteros.
He cited the construction of a detention tank underneath Padre Burgos Circle during the development stage of the present Fort Bonifacio Global City that has helped save the area, including that of Kalayaan Avenue and Efipanio Delos Santos Avenue (EDSA), from flooding.
The public works chief said flooding in Sampaloc-España area may be solved with the construction of series of huge culvert and/or detention tank at the University of Santo Tomas football field or adjacent roadway as an integral part of the drainage system to store a percentage of flood flows in a temporary period in order to manage and maintain flow levels, and reduce flood risk/impact in downstream catchment areas of Espana Boulevard.
Singson said the proposal will be discussed with Metro Manila Development Authority officials.
The DPWH will also come up with an integrated flood control plan to address flooding in Metro Manila, Bulacan, Pampanga, Rizal and Laguna Lake Area. The initial study for Metro Manila is expected to be completed before end of December 2011.