DEVELOPMENT OF A COASTAL DISASTER EVACUATION INFORMATION SYSTEM BASED ON TSUNAMI AND EXTREME WAVE DESIGN CRITERIA IN BATUKARAS VILLAGE

• Main Author: Prillya Mustafida, Rika
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/73539
• Institution: Institut Teknologi Bandung

<p align="justify"> Batukaras Village is a tourist village located on the South Coast of Java. The South Coastal Area of Java is an area that has a high potential for coastal disasters, in the form of extreme waves and tsunamis that can occur at any time. Therefore, it is necessary to reduce the value of disaster risk in Batukaras Village. This research is aimed at reducing the value of disaster risk in Batukaras Village by means of disaster modeling in the form of mapping potential tsunami inundation areas, tsunami probabilistic analysis to determine the height of a tsunami and analysis of the maximum height based on the high wave return period, as well as efforts to prepare for disaster response in terms of facilities, namely by making evacuation routes and increasing the ability of community disaster mitigation as assessed by 12 indicator criteria from the Intergovernmental Oceanographic Commission of UNESCO (IOC-UNESCO) to assess Batukaras Village as a tsunami ready village. Mapping of potential tsunami inundation areas was carried out by utilizing digital orthophoto maps of Batukaras Village, topographical maps of Batukaras Village, and tsunami inundation data of Batukaras Village. Meanwhile, in making a probabilistic tsunami analysis, a probabilistic model approach called the Probabilistic Tsunami Hazard Analysis (PTHA) was used. From this approach, the tsunami height value will be known at each observation point. The probabilistic return value of extreme waves was made using the Simulating Waves Nearshore (SWAN) modeling method and numerical calculations using the Joint North Sea Wave Project (JONSWAP) method to obtain significant wave height values. The probabilistic return value can be calculated using the formula for the expected value of wave heights in a certain time period based on the significant wave height values of the extreme distribution. Disaster response preparation efforts are carried out by evaluating 12 indicator criteria from IOC-UNESCO by interviewing related institutions and field surveys. In addition, the construction of a tsunami evacuation route information system was also carried out using the network analysis method by utilizing the djiktra algorithm through the routing machine Application Programming Interface (API) leaflet service. The aim of this project design is to produce products in the form of the existing conditions of Batukaras Village, modeling the hazard from tsunamis and extreme waves, assessing the adaptive behavior of the community, and creating routes for early disaster evacuation routes in Batukaras Village. The product of the existing condition map of Batukaras Village is a photogrammetric map, a three-dimensional topographic map, and a map of the tsunami inundation hazard area in Batukaras Village. Tsunami modeling in Batukaras Village produces a product in the form of a tsunami hazard curve; graphs of tsunami heights for earthquake return periods of 250 years, 500 years, 1000 years and 2500 years; deaggregation of each plate that affects the height of the tsunami in Batukaras Village; and the value of the probability of a tsunami occurring in Batukaras Village. Modeling of extreme waves produces a product in the form of an estimate of annual extreme waves in Batukaras Village. The assessment of the adaptive behavior of the people of Batukaras Village was carried out based on 12 indicators from IOC-UNESCO in the form of a tsunami ready village assessment indicator. The temporary evacuation route is an early tsunami evacuation route to the temporary and final evacuation site closest to the user's location.