WATER QUALITY ASSESSMENT BY USING GEOGRAPHIC INFORMATION SYSTEM (GIS) OF AI-MSHARRAH RIVER IN MISAN GOVERNORATE

Abstract

The aim of the study to the assessment of water quality by WQI model, Overall Index of Pollution (OIP-WQI) through field survey and visual interpretation of satellite images in Al-Musharrah River. Samples were collected from three sites in al AI-Msharrah River during 2022-2023 the water quality of the AI-Msharrah River was classified as slightly polluted, as it ranged (3.08) in the first site, and in the second and third sites, the values ranged (4.5-4.51) during the summer, and the river water was classified as polluted and unfit for human uses, while in the autumn and winter, the river water was classified as slightly polluted in the three sites, as the values in the three sites ranged between (3.6 -3.72). GIS maps were created based on OIP-WQI for the AI-Msharrah River for the summer, and the first site was classified in yellow as slightly polluted, its value ranged between (3.08-3.56), and at a distance from the first site, the color represented the green color with values ranging from (3.57-4.03) and classified as polluted. The rest of the sites in red ranged in value (4.04-4.51) where water quality was classified according to the OIP-WQI General Pollution Guide as also polluted. In the fall, the results recorded values ranging from (3.4-3.24) for the first site and the sites near it, which were yellow and the value of (3.41-3.56) sites in green, while the sites in red, including the second and third sites of the current study, ranged values between (3.72-3.57) and on the basis of these values water was classified during the autumn as slightly polluted. In winter, the results recorded values ranging from (3.46-3.54) for the sites in yellow and values ranging from (3.55-3.63) represented in green and (3.64-3.71) for the sites in red. These results obtained using GIS are similar to the measured OIP-WQI index values.