Developing A Spatial-based Approach For
Vulnerability Assessment Of Philippine
Watersheds And Its Potential In Disaster
Management
Author(s)
C. L. Tiburan, S. Kobayashi, K. Mizuno & I. Saizen
Abstract
The Philippines is considered as one of the most vulnerable countries in the
developing world that has experienced various kinds of disaster such as
typhoons, flooding, earthquakes, landslides and many other forms of
environmental crises. Despite being an archipelago with 7,107 islands, 53% or
around 15.8 million ha of its total land area are classified as forestlands. These
areas have also been subjected to several catastrophic events and have greatly
affected the condition of the environment, the lives of many Filipinos as well as
the economy of the country. It is for these reasons that this study aimed to
develop a spatial-based approach to assess the vulnerability of watersheds in the
Philippines to climate change and to describe its potential in disaster
management. The approach had three major components namely, climatic
variability component, exposure and sensitivity component and the adaptive
capacity component. It consisted of 22 indicators which were also classified
under three aspects of vulnerability – hazard, damage and resistance indicators.
The model used a scale of 1 to 5 to describe the levels of vulnerability for each
indicator and their thresholds were generated using statistical test, existing
indices and relevant literature. All indicators were given equal weights and the
overall vulnerability classification of a watershed was evaluated by using a ratio
between the average scale of all indicators used and the maximum scale.
Keywords
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