PRELIMINARY STUDY ON WATER QUALITY IN NONG LEK CANAL (THAILAND) AND KAMATA RIVER (JAPAN)N. YUANGPHO, W. KHANITCHAIDECHA, F. KAZAMA ADN A. NAKARUK
Nong Lek Canal and Kamata River are the important water resource for local people located in Phitsanulok Province, Thailand and Yamanashi Prefecture, Japan. The water is consumed for many purposes including agriculture and domestic. In this study, the quality of these two water resources was preliminarily evaluated by measuring the pollutants concentration of organic carbon, nitrogen and phosphorus. The overall quality of Kamata River was better than Nong Lek Canal. The highest concentrations of organic carbon (of 37 mg COD/L) and total nitrogen (of 2.4 mg/L) were found in the upstream of Nong Lek Canal. Total phosphorus was relatively low 0.1 mg/L in all water samples. From this study, it can be summarised that the water quality of Nong Lek Canal and Kamata River was still in the good condition.
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