GIS MODELING FOR INDUSTRIAL-AGRICULTURAL LANDUSE PLANNING: A CASE STUDY OF PHRA NAKHON SI AYUTTHAYA PROVINCE, THAILAND

The main objective of this research is to develop GIS-based modeling of land allocation for industrial-agricultural land-use planning. To achieve the ultimate goal, 2 main processes were integrated as a chain. They were (1) land suitability assessments and (2) the land allocation process. Phra Nakhon Si Ayutthaya Province in Thailand was selected to he the study area because of the presence of conflicts among various high potential types of development within it. The results of the land suitability assessment showed that almost 80% of the study area was suitable for agriculture whereas about 70% of the area was suitable for industry. Unavoidably, there was considerable spatial overlap within the study area. Therefore, the land allocation process was able to designate which should be the agricultural or industrial areas. The results were collated to the study area for 4 different land-use scenarios under different policies, which were the promotions of agriculture, industries, and their combinations with an orientation towards either one. These scenarios were scenario I: maximizing the agricultural area; scenario II: maximizing the industrial area; scenario III: optimizing the industrial-agriculture (I-A) area with an agricultural orientation; and scenario IV: optimizing the I-A area with an industrial orientation. These results were shown in 4 maps of the scenarios.