Thai

Abstract

The objectives of this research were to explore river data and to analyze flood risk areas in Chanthaburi in order to gain useful information for local agencies in Chanthaburi to make the plan and cope with such problems. This research focused on the beginning point or the destination of the river, the point where rivers are linked, and the point river cut through obstacles. Three areas were determined as Node. The river path between the points was called edge, which were represented through undirected graph. Data collected were then processed through Gephi version 0.9.2. Later, Graph Theory - based Centrality was considered for data analysis, consisting of five methods, namely Degree Centrality, Eccentricity Centrality, Closeness Centrality, Betweeness Centrality, and Eigenvector Centrality. Selected areas must obtain high values estimated from various methods of Graph Theory - based Centrality. The results of this research could lead to the analysis of flood risk areas in Chanthaburi. With the classification of Districts, it was found that there were 41 points of flood risk areas in Kaeng Hang Maeo; 85 points in Khlung; 55 points in Khao Khitchakut, 59 points in Tha Mai, 28 points in Na Yai Am, 12 points in Pong Nam Ron, 13 points in Makham, 123 points in Mueang Chanthaburi, one point in Soi Dao, and 4 points in Laem Sing, totaling 421 points.