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PHILIPPINES LEYTE ISLANDPHILIPPINES LEYTE ISLAND
LANDSLIDE DISASTERLANDSLIDE DISASTER
Dolores Mayor HipolitoDolores Mayor HipolitoProject Manager IIProject Manager II
Flood Control & Sabo Engineering Center Flood Control & Sabo Engineering Center
Dept. of Public Works and HighwaysDept. of Public Works and Highways
PhilippinesPhilippines
44thth WORLD WATER FORUMWORLD WATER FORUM
Mexico City, MexicoMexico City, MexicoMarch 21, 2006March 21, 2006
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SouthernSouthern LeyteLeyte, Philippines, Philippines
Landslide disaster on Feb.17, 2006
Barangay Guinsaugon,municipality of St. Bernard
Guinsaugon is lying on thevalley surrounded bymountain ranges
Population of about 2,000people
Livelihood is agriculture;rice on plain, coconut andbanana trees on the hill
slopes
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ClimatologicalClimatological MapMap
Type II Climate
• No dry season with a very
pronounced maximumrainfall from November toJanuary
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Slope is approximately 45º
Highest peak at the landslide site is700m above sea level
Topography andTopography and PhysiographyPhysiography
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GeologyGeology
Area is seismically
active
Fault lines run along
the middle moststretch of the islandof Leyte passing
Guinsaugon
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Landslide Hazard Prone AreaLandslide Hazard Prone Area
Area declared geo-hazard zone by Mines andGeosciences Bureau, Department of
Environment and Natural Resources
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Observed RainfallObserved Rainfall
Libagon
55.2 56.8
157.2
131.0
171.0
30.623.4
10.0
32.4
2.69.4
4.0
0.0
20.0
40.0
60.0
80.0
100.0
120.0
140.0
160.0
180.0
8 9 10 11 12 13 14 15 16 17 18 19 20
February 2006
R a i n f a l l ( m m )
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Slope ProfileSlope Profile
0
100
200
300
400
500
600
700
800
0 1 2 3 4
in km
e l e v
a t i o n ( m )
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AeriAeri al Perspective of Landslide Areaal Perspective of Landslide Area
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Disaster DataDisaster Data
Dead 154
Missing 973
Affected population 3,850 families (includingnearby barangays)
As of February 28, 2006 RDCC
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Area of Shaded area = 2.64 km2 1.7 km
1.3 km
Area of Deposits = 1.6 km2
Extent of Landslide Deposit ionExtent of Landslide Deposit ion
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Debris Flow DepositionDebris Flow Deposition
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Observations in Nearby Sites inObservations in Nearby Sites in
LeyteLeyte
Landslide at the fault line
Cracks on the pavement along thesliding mass
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Mechanism of LandslideMechanism of Landslide
Geological in nature triggered by heavy
rainfallRainfall penetrated through many cracksand concentrated on the impermeable
layer
Slope and terrain of the mountain were
prone to potential landslide
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Immediate Effor tsImmediate Effor ts
Rescue and recovery activitiesAssistance from local and internationalcommunities, various civic organizationsClearing of debris by Department of Public Works& Highways
Relief operations by Regional/Municipal DisasterCoordinating Councils (food, shelter, water, etc)Installation of mobile weather station by Phil.Atmospheric Geophysical & Astronomical Services
AdministrationProvision of evacuation areas by LGUs
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MultiMulti --Agency Action PlansAgency Action Plans
Comprehensive ActionsMulti Hazard Mapping
Capacity Building
Community based early warning system
Resettlement of community
Structural measures (for nearby sites)
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THANK YOU FOR YOUR ATTENTION !THANK YOU FOR YOUR ATTENTION !
MUCHAS GRACIAS!