tacloban geohazard assessment report [12.05.13]
TRANSCRIPT
![Page 1: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/1.jpg)
GeohazardAssessment of Leyte Province
Nationwide Operational Assessment of Hazards
![Page 2: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/2.jpg)
BACKGROUND
• Supertyphoon Yolanda (international name Haiyan)
• Tacloban City, Leyte
![Page 3: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/3.jpg)
Yolanda’s typhoon path moving west north west
![Page 4: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/4.jpg)
Location Map of Leyte Province. Leyte is highlighted in red. Tacloban is highlighted in blue, while Eastern Visayas (Region VIII) is in yellow.
![Page 5: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/5.jpg)
Tacloban Demographic Data
Google Maps image of Tacloban and its surrounding municipalities
2012 Census of Population and Housing (CPH, 2013a)
![Page 6: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/6.jpg)
Materials Used in Building the Occupied Housing Units in Tacloban
Outer Walls
![Page 7: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/7.jpg)
Materials Used in Building the Occupied Housing Units in Tacloban
Roofing
![Page 8: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/8.jpg)
STORM SURGE SIMULATIONThe JMA Storm Surge Model is a numerical model
developed by the Japan Meteorological Agency (JMA)
to simulate and predict storm surges
mainly caused by tropical cyclones.
![Page 9: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/9.jpg)
Storm track
Maximum wind speed,
Central atmospheric pressure,
Bathymetry.
Parameters for Storm Surge Modeling
![Page 10: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/10.jpg)
JMA Storm Surge Model of Yolanda
![Page 11: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/11.jpg)
Highest predicted storm surges for November 8, 2013 1:00 pm.
http://blog.noah.dost.gov.ph
![Page 12: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/12.jpg)
NOAA Comet Program Difference between a storm surge and storm tide.
NOAA Comet Program difference between a surge on a steep seafloor and gently-sloping seafloor.
![Page 13: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/13.jpg)
Storm tide height for San Juanico Strait, Tacloban City
![Page 14: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/14.jpg)
Storm Surge Hazard for North of Leyte (READY PROJECT)
Source: http://www.geoportal.gov.ph/ (5:01 PM – 09-25-13)
![Page 15: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/15.jpg)
Rain-Induced Landslide Hazard Map for North of Leyte (source: MGB)
Source: http://www.geoportal.gov.ph/ (5:25 PM – 09-25-13)
![Page 16: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/16.jpg)
SHALLOW LANDSLIDE SUSCEPTIBILITYSIMULATION
![Page 17: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/17.jpg)
Shallow Landslide Susceptibility Map for North of Leyte
![Page 18: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/18.jpg)
ALLUVIAL FAN AND DEBRIS FLOW SIMULATION
![Page 19: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/19.jpg)
• Based from the apex of the alluvial
fan in the municipality of Kananga,
Leyte, a total of 13 barangays are at
a risk of debris flows.
![Page 20: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/20.jpg)
![Page 21: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/21.jpg)
![Page 22: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/22.jpg)
Landslide Inventory Map for Leyte
Province
![Page 23: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/23.jpg)
0 5 10 15 20 25
Abuyog
Alangalang
Albuera
Bontoc
Dagami
Hindang
Hinunangan
Kananga
Libagon
Liloan
Mahaplag
Malitbog
Matalom
Merida
Ormoc City
Padre Burgos
Silago
Sogod
St. Bernard
Tacloban
Tomas Oppus
Number of Landslides per Municipality
![Page 24: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/24.jpg)
0 5 10 15 20 25 30
Abuyog
Alangalang
Albuera
Bontoc
Dagami
Hindang
Hinunangan
Kananga
Libagon
Liloan
Mahaplag
Malitbog
Matalom
Merida
Ormoc City
Padre Burgos
Silago
Sogod
St. Bernard
Tacloban
Tomas Oppus
% Area Affected
![Page 25: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/25.jpg)
Inventory of Landslides in Leyte
![Page 26: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/26.jpg)
Landslide Statistics Map for Leyte
Province
![Page 27: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/27.jpg)
STRUCTURALLY-CONTROLLED LANSLIDE SIMULATIONColtop3D – simulates a 3D model of the DEM showing the dip and dip direction
of its different discontinuity sets.
Matterocking - computes and estimates the locations where rock instabilities
can occur based on the identified discontinuity sets that allow sliding
![Page 28: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/28.jpg)
Potential Rockslide Zones in Tacloban City, Leyte
![Page 29: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/29.jpg)
![Page 30: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/30.jpg)
![Page 31: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/31.jpg)
![Page 32: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/32.jpg)
Portion of Leyte and
Southern Leyte
Potential Rockslide Zones
![Page 33: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/33.jpg)
Saint Bernard, Hinunangan,
Libangon and Liloan
Potential Rockslide Zones
![Page 34: Tacloban geohazard assessment report [12.05.13]](https://reader034.vdocuments.net/reader034/viewer/2022051211/5551c368b4c905922b8b475b/html5/thumbnails/34.jpg)
Guinsaugon Area
Potential Rockslide Zones
and Rock Mass
Propagation Extent