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This study aims 1) to create a spatial database of land use in order to analyze the agricultural potentials in Nakhon Ratchasima province, and 2) to apply geographic information system for planning to prevent damages from drought and flooded areas in Nakhon Ratchasima province.
It is a collection of secondary information from the KORAT_GIS research document database, field data collection, capture of geographic coordinates, translation of satellite images to classify land use by the supervised classification technique together with the Potential Surface Analysis (PSA) spatial analysis methods. Data is superimposed and areas at risk of flooding and drought are assessed by scoring and ranking the risk in each area. It was found that 1) accurate and appropriate spatial databases were obtained as follows: (1) land use database, (2) soil series database, (3) community product database or agricultural OTOP, (4) agricultural local wisdom database, and (5) database of potential analysis/problem of the area; and 2) in terms of drought risk areas, it was found that there is no risk of drought for an area of 20,818.75 rai, low risk of drought for an area of 1,564,718.75 rai, moderate drought risk for an area of 9,516,237.50 rai, and high risk for an area of 1,738,787.50 rai. Most of the areas, constituting three quarlters, are at a moderate risk of drought. In terms of flood risk areas, it was found that an area of 9,587,075.63 rai, constituting three quarters, found in the lower part of the province with relatively high topography and mountains are prone to flooding at a low level. There is a moderate flood risk for an area of 3,415,358.13 rai found in the middle part of the province as well as spreading across the province, and a high risk of flooding for an area of 506.88 rai found in the upper area of the province.
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