Spatial Pattern of Socio-economic Landslide Vulnerability and its ...

There were significant different amongst cases of fuzzy operators. Fuzzy membership and
fuzzy operator play important role to generate final map of socio-economic landslide vulnerability.
It implied that fuzzy operator Or, Sum and high gamma value represented better result than fuzzy
operator product, fuzzy operator and and fuzzy operator with low gamma value. Since the fuzzy
operator product, and and low gamma value working with returning the minimum value of the pixel
membership and the result was always less than the membership value of the input, the result of the
map will be low vulnerable in the whole area. Thus, fuzzy operator product, fuzzy operator and and
fuzzy operator with low gamma value were not included in the analysis.
Figure 5 (a) Socio-economic Vulnerability Map of Kayangan Catchment (b) High Accessibility and Centre of
Activities(c) Low Vulnerability Household (d) Bad Road Condition Showing Low Accessibility
(e) High Vulnerability Household in Hilly area
The result map of fuzzy operator Or, Sum and high gamma value tend to have similar trend
describing socio-economic vulnerability level. High vulnerability level was located in the middle
part of Kayangan Catchment in which covered by steep topography and low accessibility. The
result of field observation showed that the settlement pattern of high vulnerability level tend to be
clustered and was characterized by semi-permanent building constructed by non-engineered
bamboo and timber.
The clustered pattern would depend on the natural resource. A single clustered village was
usually located close to water resource (spring water). It was due to water supply in the hilly area
which fully depends on the availability of spring water. It is sometime also used to irrigate rain fed
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