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Evaluation of Changes in Agricultural Stream Water Quality of Small Watershed in Chungnam Province
Yeo-Uk Yun,Jin-Il Lee,So-jin Yeob,Soon-Kun Choi 한국토양비료학회 2019 한국토양비료학회지 Vol.52 No.4
This study aimed to identify the changing trends in the agricultural water quality of the major watersheds in Chungnam Province over a 10-year period ranging from 2007 to 2016. The results of water quality analysis revealed that the mean chemical oxygen demand was 4.1 mg L<SUP>-1</SUP>, with the median values being 4.0 mg L<SUP>-1</SUP>. The result of annual CODMn of stream water showed tendency to increase. The mean and median values of EC(electrical conductivity) were 0.21 dS m<SUP>-1</SUP>and 0.19 dS m-1, respectively. The mean T-N (total nitrogen) was 2.91 mg L<SUP>-1</SUP>, with the median values being 2.47 mg L<SUP>-1</SUP>. The mean and median values of the T-P (total phosphorous) content were 0.11 mg L<SUP>-1</SUP> and 0.07 mg L<SUP>-1</SUP>, respectively.