A-GIS BASED APPROACH OF EVACUATION MODEL FOR TSUNAMI RISK REDUCTION

Ratna Sari Dewi, BAKOSURTANAL

Abstract


In the tsunami mitigation plan, evacuation plays a crucial measure for saving human lives. Especially for communities who are living in a low-lying coastal area. Given their location, it would be impossible to evacuate these communities in time, which could result in significant loss of life.

This research tried to develop a method to choose the most effective evacuation routes using GIS tools in a tsunami-prone area, case of Cilacap coastal area. Network analyst and many GI techniques were used to determine the location and capacity of potential suitable evacuation shelter buildings and also the most effective evacuation route for tsunami. The evacuation process was simulated that the residents of the inundation area will be encouraged to walk to safe areas in certain of time.

Results of the modeling include proposed location of additional ESBs, capacity and service area of each building, and also evacuation route for each center of population to reach escape buildings. The number of additional shelters should be added were different for the different characteristic of study areas regarding the number of evacuees. Daytime and night-time scenarios were also resulted in the different distribution and number of shelters needed. The effective evacuation routes were developed for each service area. Travel time was an essential factor to be considered since it would limit the movement of evacuees in evacuation process.

Keywords


Evacuation; Shelter; Routes; Tsunami; Cilacap; Network analyst; Model

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