Evaluation of Changes in Agricultural Stream Water Quality of Small Watershed in Gyeonggi Province

다국어 초록 (Multilingual Abstract)

This study aimed to identify the changing trends in the agricultural water quality of the major watersheds inGyeonggi Province over a 10-year period ranging from 2007 to 2016. The results of water quality analysis of the study sites revealed that the mean chemical oxygen demand was 3.8 mg L -1 , with the median values being 3.5 mg L -1 . The mean chemical oxygen demand in April, July, and October were 4.7, 3.8, and 3.1 mg L -1 , respectively, and chemical oxygen demand values trended to decrease from April to October. The mean and the median electrical conductivity were 0.22 dS m -1 . The mean electrical conductivity values were slightly higher in April and lower in October, and there was no yearly fluctuation. The mean and median values of the T-N (Total Nitrogen) content were 3.3 mg L -1 and 3.0 mg L -1 , respectively. The mean and median values of the T-P (Total Phosphorous) content were 0.10 mg L -1 and 0.06 mg L -1 , respectively, and there was no tendency to increase or decrease during the April, July and October.

참고문헌 (Reference)

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