Geohazard mapping and assessment program

1. GEOHAZARD MAPPING AND
ASSESSMENT PROGRAM
Presented by:
Ma. Gerarda Asuncion D. Merilo
Sr. EMS, Climate Change Office
Environmental Management Bureau

2. WHAT IS GEOHAZARD MAPPING AND
ASSESSMENT PROGRAM?
The Geohazard Mapping and Assessment Program is a
on-going priority program of the DENR, which is being
implemented by the Mines and Geosciences Bureau (MGB).
Main objective:
To identify areas in the country which are
susceptible or vulnerable to various geologic hazards,
or geohazards.
The program also seeks to provide information to various
stakeholders in order to lessen or mitigate the impact of these
events.

3. WHAT ARETHE COMPONENTS OFTHE
PROGRAM?
 Rapid assessment survey to generate geohazard maps that will
indicate which areas are prone to natural dangers like landslides,
flooding and ground subsidence;
 Printing and reproduction of maps, manuals and information
materials for public dissemination; and
 Conduct of seminars and workshops for local government
officials and public school teachers to increase their awareness
and preparedness on various natural hazards, as well as teach
them on the proper use of the geohazard maps

4. WHAT ARE GEOHAZARDS?
Geohazards are naturally occurring geological
phenomena that pose danger to people’s lives,
properties, infrastructure and communities.These
include landslides, flooding and land subsidence. However,
in some cases, geohazards can also be induced by human
activities.
Geohazards cannot be totally prevented but their impact
on people and the environment may be lessened or
mitigated.

5. WHAT HAVE BEEN ACCOMPLISHED SO
FAR BYTHE PROGRAM?
 Identified theTop 10 provinces highly susceptible to landslides
 Identified theTop 10 provinces highly susceptible to flooding
 Completed the geohazard assessment and mapping of all the
1,634 cities and municipalities, with a scale of 1:50,000
 Distributed a total of 75,000 map sheets to all local government
units down to the barangay level, with corresponding training
and capability-building to interpret the maps
 Started the preparation of more detailed geohazard maps in
2011, with scale of 1:10,000, initially targeting 218 municipalities

6. TOP 10 PROVINCES HIGHLY SUSCEPTIBLE
TO LANDSLIDES
1. Marinduque
2. Rizal
3. Cebu
4. La Union
5. Southern Leyte
6. Benguet
7. NuevaVizcaya
8. Batangas
9. Mt. Province
10. Romblon

7. TOP 10 PROVINCES HIGHLY SUSCEPTIBLE
TO FLOODING
1. Pampanga
2. Nueva Ecija
3. Pangasinan
4.Tarlac
5. Maguindanao
6. Bulacan
7. Metro Manila
8. North Cotabato
9. Oriental Mindoro
10. Ilocos Norte

8. TOPOGRAPHIC MAP

9. GEOHAZARD MAP

10. FLOOD AND LANDSLIDE SUSCEPTIBILITY
INTHE PHILIPPINES

11. GOVERNING RULES AND POLICIES
 DAO 2000-28, March 14, 2000
 Implementing Guidelines on Engineering Geological and Geohazard Assessment as Additional
Requirement (EGGAR) for ECC Applications covering Subdivision, Housing and other Land
Development and Infrastructure Projects
 Memorandum Circular (MC) 2000-33
 Guidelines and Checklist in the conduct of an EGGA and preparation of corresponding report
(EGGAR)
 DENR Memorandum Circular October 2000
 Guideline on EGGA preparers
 Presidential Executive Order (EO) 45 October 24, 2001
 Mandate on all DENR agencies involved in the issuance of housing-related certifications, permits
and clearances, to observe periods and provide appropriate mechanisms to fast track the
approval and implementation of housing projects.
 Memorandum Circular 26 November 2001
 Implementation of EO 45
 MGB MC 2002-43 18 February 2002
 Guidelines relevant to EGGA concerns in the implementation of EO 45

12. GOVERNMENT AGENCIES
Mines and GeoSciences Bureau (MGB)
Philvolcs
PAGASA

13. LINKSTO GEOHAZARD MAPS
http://gdis.denr.gov.ph/mgbviewer/
http://www.mapcentral.ph/mgb/index.cfm?maptype=Flood&areatype=Philippi
nes&code=Philippines&listform_prov_code=