An Integrated System of Geographic Information and Water Quality: Lamtakong River

Abstract

A cause of the river being shallow, and the water quality being rotten from land-used were changed. Therefore, the study of a relationship between water quality and land-used that usefully for a water pollution management. The purposes of this research were 1) to develop a model of factors that influence water quality using j48 algorithm, 2) to develop a Geographic Information System for Retrieve and display data quality and Water Pollution (GIS_IRWP), and 3) to evaluate the effectiveness of GIS_IRWP. The results of this research found that: The first, the decision tree model provided an accuracy 78.21%. The second, the GIS_IRWP was the information system of spatial data (included: district boundary lines, river transport, Lamtakong River lines, land-used and agricultural areas) integrated with water quality data. The GIS_IRWP can retrieved the information that presented in spatial form. The last, an evaluation the effectiveness of the system by both of experts and users found that the system had effective in high-level means at 4.07 and 4.48 respectively.