การวิเคราะห์แหล่งกำเนิดน้ำเสียของแม่น้ำกวงและการหาแนวทางสำหรับการปรับปรุงคุณภาพน้ำ

Abstract

This independent study was conducted to determine the method for improving the quality of the Kwang River by analyzing the source of wastewater affecting the quality of the water. Three monitoring points were assigned, namely CMU01 which was the area of wastewater discharge from Northern Region Industrial Estate; CMU02 which was at Tha Nang Bridge area and CMU03, which was at the Ban Yu Bridge area. Samples were collected once a month during December 2022 - February 2023, to analyse and calculate for the Water Quality Index (WQI) and compare with the results of Environmental and Pollution Control Office 1 (Chiang Mai). In addition, the actual measurement results were compared with the prediction from Streeter-Phelps model. It was found that the water quality in the Kwang River during December 2022 and January 2023 was in good conditions while in February 2023, it was in fair conditions. Sources of wastewater that were influential in the study area were those from industrial estates and domestic wastewater. To improve the quality of the Kwang River, a system for treating wastewater from wastewater should be considered.