APPLICATION OF POLLUTION INDEX (PI) TO ASSESS THE WATER QUALITY BASED ON PHYSICOCHEMICAL PARAMETERS OF QILIASAN AND KANI-BAN STREAMS IN SULAIMANI CITY

Abstract

This investigation focused on two streams, named Major stream Qiliasan and Minor stream Kani-Ban, which converge to form the Tanjero River. The assessment of water quality in both Qiliasan and Kani-Ban streams was conducted at five unlike locations during two seasons (winter and summer) in the year 2023. In this study, the Comprehensive Pollution Index was utilized to evaluate the water quality status of Qiliasan and Kani Ban streams, and to determine the physiochemical parameters responsible for water pollution. These parameters include: water temperature, pH, electrical conductivity, turbidity, total dissolved solids, color, calcium, magnesium, chloride, and sulfate. The Comprehensive Pollution Index was found to be higher during the summer than in the winter, making it a more clear indicator of pollution in the summer. The results based on the calculation of the Comprehensive Pollution Index indicated that all stations were found to have moderately to severely polluted water in the summer season, with Comprehensive Pollution Index values ranging from 1.18 to 2.57. However, during the winter season, the water quality showed slightly to moderately contamination, with Comprehensive Pollution Index values ranging from 0.86 to 1.53.

Keywords

• comprehensive pollution index
• water pollution
• wastewater
• sewage effluent