Area               : 698.26 sq. km.
Region           : III, IV-A, NCR
Provinces      : Rizal, Bulacan
Towns/Cities : 15
Barangays      : 197
Outlet             : Pasig River further drains into Manila
Est. Pop’n       : 7,503,671 (2010)
RBO                 : Protected Area Management Board Upper Marikina River Basin Protected Landscape
RDC Reso.       : RDC Resolution No. 4A-35-2015
Forestland       : 325.59 sq. km.
A&D                  : 372.67 sq. km.
NGP Area         : 136.13 sq. km. (as of October, 2015)


"Clean, safe and productive watersheds, managed by a competent, dynamic and well coordinated institution, for an inclusive social, environmental and economic development"


  • Marikina River in unison with the environment: providing beneficial use notwithstanding the informal role as cleanser of the surroundings.
  • Restored and sustained watershed responsive to the needs of the different stakeholders promoting socio economic development.
  • Protected environment and maintained ecological balance to ensure environmental and social sustainability of development activities in the MRB.
  • The healthy environment will dictate the type of livelihood and prosperity of the population of MRB.
  • Operation of appropriate and adequate flood control systems that prevent flooding according to the flood prevention plan.
  • A dynamic and well represented river basin organization is in place to effectively implement the strategies, programs and projects in the various components to put in place the principles and concepts of Integrated River Basin Management.
  • Marikina River is a natural waterway that collects and conveys surface runoff with marginal change in its bathymetry and the floodplain.
  • Invigorated civil society and private sector in managing and developing the MRB.
  • Management of water resources and watershed that balances the need for conservation, maintaining environmental integrity and economic development; and
  • Creation of more livelihood opportunities.

  1. Marikina Watershed Reservation
  1. upper Marikina River Basin Protected Landscape

  • Rainfall : 4,016.20
  • Surface Run-off: 2,025.40 mm/year
  • Groundwater Recharge: 567.30 mm/year
  • Total Water Yield: 2,940.30 mm/year ** From Water Balance (1985-2010)

  • Rice—20,320 has (wet season); 2,162.5 has (Palagad season); 3,765 has (dry season)
  • Corn—5,119 has (wet season)
  • Vegetable—1981 has
  • Rootcrop—847 has

  • Proposed Hydropower:
  • Nangka 4 – 1.08 MW
  • Marikina – 2.59 MW
  • Hinulugang – 2.24 MW
  • Nangka I – 1.85 MW
  • Marikina I – 1.89 MW
  • Marikina Upper–6.87MW
  • Montalban – 1.85 MW
  • Marikina 3 – 2.46 MW

  • Upper Marikina River Basin Protected Landscape (NIPAS Proclamation No. 296)
  • *Remaining Dipterocarp Forest in Montalban Area (Tanguile, Mayapism Natom White Lauan, Red Lauan, Bagtikan and other commercial species)
  • **Home for Philippine Eagle (Pithecophaga jefferyii), Labuyo (Gallus gallus), Quail (Coturnix sp.), Philippine Hawk Eagle (Spizatus philippensis), deers, wild pigs, Palm Civet, pythons and monitor lizard

  • Improper land uses, management and allocation
  • Rapid population growth
  • Rapid urban development
  • Depleting water resources
  • Pollutants and wastes
  • Lack of Institutional arrangements for River Basin Organization
  • Frequent flooding
  • Water Resources
    • Classify the different sections of the River to determine best usage based on detailed streamflow and water quality characterization
    • Assess water supply sources, eg. Wawa Dam
  • Institutional Arrangement
    • Policy and institutional reforms
    • Improve capacities of institutions and communities in IRBM
    • Involve the various sectors in addressing the concerns for watersheds
    • Participatory, institutional and decision-making processes to effect a multi-stakeholder coordination in the plan implementation
  • Watershed Resources
    • Build capabilities of stakeholders to manage and conserve the watersheds
    • Improve the ecological/protective and socio-economic and productive values of the watersheds
  • Flood Control and Mitigation
    • Close coordination with DPWH by the concerned LGUs and government agencies in providing inputs for the modification of the design of PMRCIP (Phase IV)
    • Complementation of the EFCOS with the PMRCIP especially at rainfall with > 30 year return period