Key Japan-designed retarding basins in Cavite near completion–DPWH

Published August 28, 2021, 3:40 PM

by Betheena Unite

Flooding woes in some areas in Imus and Bacoor, Cavite are expected to be addressed by the end of the year when the construction of two major retarding basins in the province is completed.

ANTI-FLOOD–These Japan-designed retarding basins are expected to be completed by the fourth quarter of 2021. It will help address flooding woes in low-lying areas in Cavite. (Photo courtesy of the DPWH)

Two reservoir projects namely Imus and Bacoor retarding basins located in Barangays Anabu and Buhay na Tubig in Imus City are currently under construction and are now 85 percent completed.

The entire project is poised for completion in the fourth quarter of 2021.

Once completed, it is expected to reduce the flood peak discharges to low-lying part of Imus and Bacoor Rivers by temporarily managing flood run-off or storm water in the off-site retarding basins.

Department of Public Works and Highways (DPWH) Secretary Mark Villar is confident that the P2.2-billion flood risk management project for Imus River is the most viable solution to mitigate damage on areas vulnerable to flooding in Imus and Bacoor.

“We have high hopes that this project will reduce flood risk to local homes and businesses,” Villar said.

The construction of the Imus retarding basin has a detention pond area of about 35 hectares while Bacoor retarding basin has two temporary storage pond or basin connected by sluiceway for a total area of 9 hectares to contain floodwaters during a storm and reduce the peak volume of flood flow in Imus River and Bacoor River.

Retarding basins are being constructed to temporarily store most, if not all, of the rainwater run-off during very high rainfall, to absorb and contain flooding in periods of high rain and later release at regulated flow rate.

The project is based on a flood management master plan for Imus River prepared by Japan International Cooperation Agency (JICA).

The ongoing structural measure is also being funded by JICA under its Official Development Assistance (ODA) facility and implemented by DPWH-UPMO Flood Control Management Cluster.

Undersecretary Emil Sadain said current works include the putting up of pre-cast concrete blocks revetment wall at surrounding dike, overflow dike, drainage sluice, maintenance road, slope protection, and other project components.