CONCLUDING REPORT

Roadmap toward Effective FloodHazard Mapping in the Philippines

Prepared by:
BRIGILDO M. FABIA
Department of Public Works and Highways
Philippines

1A. The Role of flood hazard maps to mitigate flood damages in thePhilippines.
 Heavy rains over the Philippines especially in Legazpi City isalways visited by typhoon every year. Although Legaspi City is
not directly hit by typhoon these past years, other parts of thecountry have experienced severe flooding. The National
Disaster Coordinating Council (NDCC) chaired by theSecretary of Dept. of National Defense (DND) is very activein the implementation of Disaster Preparedness Programs ofthe government. The members are various government agencies
and local government units. It is through the NDCC memberagencies that disaster preparedness, prevention, mitigation andresponse carry out its corresponding tasks and responsibilities
under the NDCC system。Many Local Government units arepreparing now their own Flood Hazard Maps.

Note ; Typhoon this past few years damaged some parts of the country.

2 The country has conducted several consultation meetings andseminars especially Department of Public Works andHighways (DPWH), local government unit officials, andother government lead agencies. This is to improve actions on
disaster prevention The participation of media especiallybroadcast media helps a lot in disseminating forecast and otherinformation before, during and after the occurrence.
 These flood damages will be mitigated thru the following
measures;¾ Non-structuralo Flood Hazard Maps which will educate peoplefor ; Awareness on flood disaster (floodrecords)
 Knowledge on areas of evacuation,
location and routes, the dangerous spots
on evacuation routes
 Predicted inundation areas and depths
and other useful information reflected inFlood Hazard Mapo Establish additional permanent resettlementsites and evacuation centerso Programs on Flood Precautionary measures andFlood Management Policies ( e.g.Land Zoning,
Watershed Management Reforestation)o Flood Forecasting and Warning¾ Structuralo Continuous seminars and trainings on theeffective design, construction and maintenanceand monitoring of present status of floodcontrol structures

3B) The allocation of roles in making flood hazard maps in thePhilippines

Barangay (BarangayCoordinating Council

Provide details history of inundations of rivers

Municipalities/Cities(CoordinatingCouncil)

Provide additional statistical data and other details ofeach baranggay Create/Implement policies on local
flood management.

ProvincialGovernment(Provincial DisasterCoordinating Council)

Collate Data and create/approved/implement somepolicies in flood management both local and nationallevel

Flood
Mapping
Preparation

Dessimination

 The National Disaster Coordinating Council (NDCC) headed
by Dept. Of National Defense duly supported by the local
government units, Department of Public Works andHighways and PAG-ASA of the Dept. of Science andTechnology (DOST) and other lead agencies be given the rolein making flood hazard maps.

NDCC headedby Dept. ofNational
Defense /Office of Civil

Government Lead
Agencies、DPWH,and PAGASA/DOST（use FHM for flood
mitigation bothstructural and nonstructural）
4C) Action Plan of making flood hazard maps in thePhilippines Legazpi City and the covered barangays affected by Yawa, Tibu,
and Macabalu rivers are my target area. The basin area (LegazpiCity) is the commercial center in Albay province. Many
residents of the neighboring barangays especially those nearby
Yawa River mostly stay very near to the dikes. These rivers arebeing dredged to address the problem on sedimentations caused
by volcanic debris. Funding is always the problem to support
this kind of project of the government.
Major flood damages occurred in the area happened in December 5,
1993
Number of families affected ; 233,115 families
Number of persons affected ; 1,150.000 persons
Major cause of damage during flood disasters;
Inundation of rivers within the area. Some residents did not
notice the possible extent of flooding. Some loss their lives
during evacuation or transfer to safer place.

FLOOD PRONE AREAS IN LEGASPI CITY Many previous studies conducted by various foreign and local
firms are submitted to NEDA and DPWH. Data on these studies
maybe used in the preparation of Flood Hazard Map.
LEGEND
Some Previous studies :o Comprehensive Disaster Prevention Around Mayon
Volcanoo Bicol River Basin Watershed Management Project
AREAS REGULARLYAREAS OCCASIONALY
RIVERS, CREEKS AND
SEASHORES5

In this area the following are one of the priorities in preparing theFlood Hazard Map :¾¾¾¾¾Identify the highest inundation area/vulnerable areas
Identify possible evacuation sites or centers
Length and weaker points along the routes.
Possible means of disseminations
Initial information to residents regarding the importance ofHazard Maps
¾ Coordinate with NDCC regarding some programs (e.g.
UPGRADING PAGASA & PHIVOLCS FORECASTINGCAPABILITY,etc)

Thru Public information Campaign on Disaster Preparedness using
Flood Hazard Map, disasters in the area will be lessen ;¾ Less panic will happen, handicapped will be in safe placethru effective flood warning and forecast¾ Evacuation centers will be properly and ready foroccupation of evacuees.(depending on the duration offloods)¾ Access roads with proper signs and signals will be fully
utilized, traffic jams will be avoided¾ Eliminate water diseases due to proper information onflood precautionary measures Many previous studies conducted by various foreign and local
firms are submitted to NEDA and DPWH. Data on these studies
maybe used in the preparation of my Flood Hazard Map
Some Previous studies :o Comprehensive Disaster Prevention Around Mayon
Volcanoo Bicol River Basin Watershed Management Project Action Plan within five (5) years
o Make reports, conduct additional research and introduce
the advantages of flood hazard maps to my office andother agencies. ( 6 mo. To 1 year )o Make Data gathering for the preparation of my pilot basin
area. ( 1 year )6

o Formulate training and expand the research for aneffective Mapping ( 2 to 3 years)o Coordinate with other agencies for possible
inclusion/revision in their existing flood hazard maps.
 Problems on funding, instruments to be used on data gathering,
continues training and lack of qualified personnels.

D) Study Tours/Town Watching made great contributions to create anidea in preparing flood hazard maps to participants. Both theStructural and non-structural measures were also given importancein flood hazard mapping during lectures. Topics on flood modelingmust be given more time to familiarize the participants in using thelatest software. It will be the basic tool to determine the depth andinundation areas (extent of flooding) aside from the data gatheredfrom interviews and surveys.

THANK YOU !!!

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