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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!