การประยุกต์ใช้ระบบสารสนเทศทางภูมิศาสตร์เพื่อการประเมินศักยภาพ ทรัพยากรน้ำและที่ดิน บริเวณลุ่มน้ำสะแกกรัง ประเทศไทย / ประชุมพร นิรัติศยกุล = GIS application for the evaluation of water and land resources potential on Sakae Krung basin, Thailand / Prachumporn Niratsayakul
Application of GIS for the evaluation of water and land resources potential on Sakae Krung Basin reduces time in evaluation procedures as well as increases accuracy of the research results. Moreover, GIS can be used for data analysis, spatial presentation and providing clearer pictures of the entire spatial change. For land resources assessment, this study compared land use change using data interpreted from satellite image in 1990 and 1997 and soil property and suitability for agricultural practices as recommended by Department of Land Development. The result founded the extension of agriculture land into the forest area which had inappropriate slope for agricultural practices. The expansion of agricultural land increased the total amount of water consumption within the basin since agriculture sector normally consumes water more than any other sectors. The evaluation of water discharge quantity using simple linear regression of dry season rainfall-runoff relationship on Mae Wong subbasin founded that the amount of discharge was less than that of consumption which, in turn, causing inadequate water supply in dry season. Therefore, the study recommended that agricultural land use as well as cropping pattern of Sakae Krung basin should be improved according to its potential. Finally, with increasing water resources management efficiency, the future agriculture practices should be maintained at the equilibrium point of its water supply.