Pasig-Marikina River Basin Flood Management Project

dropped

The Pasig-Marikina River source is north-east of Metro Manila and the river flows through the city to Laguna de Bay and Manila Bay. The river has limited conveyance capacity and intensive rainfall events during the rainy season from June to November causeregular flooding in the basin. Metro Manila is one of the most densely-populated cities in the world with a population of around15 million and the recurrent flooding has significant impact on millions of people’s lives and the economy. Management of floodswill be critical to improve the quality of life of the 7.5 million people living in the Pasig-Marikina River Basin. Government,through the Department of Public Works and Highways, has invested in river bank strengthening to safely convey rainfall events witha 1:100 year return period, but this infrastructure cannot function optimally until river flow and capacity issues in the uppersection of the river basin have been addressed. These additional interventions will be implemented through the proposed project,including major structural measures (large dam and a retention basin), related smaller structural measures (catchmentrehabilitation, sediment management, and flood forecasting and early warning systems), non-structural measures (inundation mapping,emergency response planning), and support to indigenous people living in the project area.