Analysis of Suitable Areas for Shelters and Evacuation Routes: A Case Study of the Flood Areas in Khlong Nathawi Subwatershed, Songkhla Province

• Main Author: Thidapath Anucharn
• Format: Article
• Language: Thai
• Published: Mahasarakham University 2020-04-01
• Series: Warasan Witthayasat Lae Theknoloyi Mahawitthayalai Mahasarakham
• Subjects: suitable areas; shelter; evacuation routes; flood; songkhla
• Online Access: http://journal.msu.ac.th/upload/articles/article2605_43506.pdf

This research aimed to analyze suitable areas for shelters and evacuation routes in flood areas of Khlong Nathawi subwatershed, Songkhla Province by using the application of geographic information systems and network analysis. The analysis of suitable areas for evacuation from flood areas consisted of 7 criteria; road route, stream route, the elevation from mean sea level, flood areas, land use and landcover, slope and soil drainage capability. The hierarchical analysis was processed to determine the important weights of criteria. In addition, the frequency ratio method was calculated to define the score of the classification group in each factor in an area that never flooded. Then, the sum of the scores obtained from the analysis process was applied to classify the suitability of the area for evacuation. In order to analyze the location of the shelters, the researcher chose the district office, temple, health promoting hospital, hospital and school. The center of each sub-district and village were addressed by the sieve analysis and the nearest location. Finally, the evacuation routes were managed and data displayed via Google Earth. As a result of this research, it was found that the suitable areas for evacuation were the highest, high, moderate, low and lowest range that covered 28.58 %, 15.54 %, 30.03 %, 18.29% and 4.55 % of the areas, respectively. As for the suitable location for the shelter, there were 52 places which were suitable routes for evacuation in the shortest period.