The Development of Geographic Information System for simulating the epidemic risk areas of Golden Apple Snail in Mun River, Phimai District, Nakhon Ratchasima

Abstract

Simulating of epidemic risk areas of Golden Apple Snail in Mun River, Phimai District, Nakhon Ratchasima was conducted by secondary data collecting from various organizations and people involved in the study area. The land use/land cover classification was created from Thaichote satellite data. Ground truth validation revealed the overall accuracy at 94.92 % whereas the Kappa Coefficient was 92.95 %. The result of land cover classification showed that paddy field occupied the largest area at 83.90 % of the total area. Additionally, it was found that the difference between the high level of ASTER GDEM and DGPS was 0.58 meter at the highest and 0.35 meter at the lowest in which of the same direction. The simulating of epidemic risk area of Golden Apple Snail in Mun River with HEC-RAS package program indicated that flooded areas along the river bank, duration, and other factors that had affected the propagation of Golden Apple Snail, including water streaming, water pumping, and water gates opening. These caused the rapid spread of Golden Apple Snail into the paddy field which covered an area of 368.799 sq.m. along the Mun River.