Mt. Pinatubo Hazard Mitigation Project
project is located in the Pasig-Portrero River Basin.
The purpose was to create a before & after scenario
for areas surrounding Mt. Pinatubo that were affected
by the volcanic erruption.
Database and Digital Terrain Model (DTM)
This is being used for three-dimensional lahar flow
simulation. The work item includes the following:
Base Maps Prior To Erruption
Base maps & topographic maps that were made
prior to the eruption were digitized into CAD
files. Houses, road, river and elevation features
were classified in different attributes. A DTM
was created from contour data from digitized data.
Base Maps After Erruption
Base maps & topographic maps made from actual
field suyrvey data made after the erruption were
digitized into CAD files. Mega Dike and contour
lines were digitalized and installed in different
layers respectively. New features such as roads,
dikes and waterways were also noted by comparison
with the old data. A new DTM was created from
the ground survey data. By comparing the 2 digital
map sets the GIS Database was able to make flood
analysis predictions on areas that are vulnerable
during the rainy seasons.