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Improvement of the Flood Forecasting and Warning System for Magat Dam and Downstream Communities.
Client: Department of Science and Technology, Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA).NVE Mandate: To assist and advice PAGASA with implementation of the flood forecast and warning system project.Contract value/Duration: MNOK 10.685; - started in November 2010 and will end in late 2012 or early 2013.Type of Activities: Rehabilitation of hydrometric network, development of procedures for use of data for flood forecast/ warning systems, and associated training.Work completed in 2010: Updating of project plans; Signing of Institutional Agreement between PAGASA and NVE.
The Cagayan river basin is the largest in the Philippines, encompassing the provinces of Nueva Viscaya, Isabela and Cagayan. The basin is affected by recurring floods due to tropical cyclones and the northeast monsoon. To mitigate adverse effects of flooding in the basin, the Philippine Government established the Cagayan Flood Forecasting and Warning System (FFWS) in 1982. The FFWS was upgraded in 1992 with the inclusion of a warning system for operation of the Magat Dam; -multipurpose dam for irrigation of 102,000 hectares of farmland and power production. The system has since encountered problems, including breakdown of the telemetry system and some of the monitoring stations. The ability to warn people downstream and to operate the spillways of the Magat Dam satisfactorily in order to decrease the flooding risk has therefore been reduced.
In June 2008 Norad asked NVE to assist PAGASA preparing a proposal for the rehabilitation and upgrading of the system. A field visit including an assessment of the station network was conducted by NVE officials in November 2008. As an agreed follow-up, NVE prepared a proposal in close cooperation with PAGASA on how to structure potential Norwegian support for this rehabilitation and upgrading of the FFWS. Upon submission, the proposal was later approved by Norad and by the Norwegian Embassy in Manila; - the agreement between the Embassy and the Department of Science and Technology of the Philippines was signed in late December 2009.
Activities and Outputs:The following have been accomplished during 2010:
Issues and Challenges:Change of staff and contact person within PAGASA hampered progress for some time in the course of the year. Large floods during second half of 2010 also caused a considerable delay in the institutional cooperation. On the other hand, these large floods proved the importance of the project, which now seems to be back on track with a strong commitment towards its implementation.