Study on the application of geographic information system to study the flood risk caused flooding in the area of phatthalung were conducted. To study the risk area to flood. The province.In the area of the province. Application of geographic information system with the overlay data meteorological factors and information, physical factors affecting the flood. The rainfall data size drainage area.The soil texture data, soil depth, and the information of land use, the study found that the province has an area at risk of flooding in high most. Thinking about 2 area,182.73 square kilometers (percent), followed by 67.75 area flood risk in the medium 778.36 square kilometers (%). 24.16) and risk area is at a low level, disaster area is around 260.45 square kilometers (per cent 8.08) which flood prone areas in high level mainly displacement distribution near the ตะวันออกของ study area. Adjacent to the lake basin.The mountain area with high slope. The area susceptible to flooding on paddy fields.Because paddy fields mainly on the plain. The paddy fields a chance risk occurrence is affected by disaster. The flooding problem is a problem that is causing the loss of life and property
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