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유역특성에 따른 하천에서의 존재형태별 질소 분포 특성 비교
박지형 ( Ji Hyoung Park ),손수민 ( Su Min Sohn ),김용석 ( Yong Seok Kim ) 한국물환경학회 2014 한국물환경학회지 Vol.30 No.5
The temporal and spatial analyses of total nitrogen (TN) fractionation were conducted in order to understand 1) total nitrogen components in streams and 2) their patterns in rainy and dry seasons. The result showed that the concentration of nitrogen components in stream water was lower in non-urban area and getting higher in urban area. Dissolved total nitrogen (DTN) was 95~97.7% of total nitrogen in streams, and the proportion of dissolved organic nitrogen (DON) and ammonia nitrogen (NH3-N) was higher with increasing urban area. The concentration of total nitrogen and nitrate nitrogen (NO3-N) were highest in winter among four seasons. The result was showed that concentration of NH3-N was same variation as concentrations of TN and NO3-N in urban-rural complex and urban areas, except rural areas. During rainy season, concentrations of particulate organic nitrogen (PON) and NH3-N increased in rural areas and decreased in both urban-rural complex and urban areas. Correlation between total nitrogen components and land uses was positively correlated with site > paddy, and negatively correlated with forest. The variation of total nitrogen concentration was determined by NO3-N in non-urban areas, by NO3-N and NH3-N in urban-rural complex and by NH3-N in the urban areas.
경험식과 요인분석을 통한 오염물질 유출 특성 연구-남한강 상,하류 수계 주요 하천을 중심으로
박지형 ( Ji Hyoung Park ),손수민 ( Su Min Sohn ),류덕희 ( Doug Hee Rhew ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.6
This study was conducted to characterize the discharge feature of pollutant load from the upper and lower watershed influencing on the water quality of South Han River using the empirical equation and Factor Analysis. The results of regression analysis between flow rate and pollutant load were as follows. In the streams of the upper watershed of South Han river, BOD5 and CODMn were increased as the flow rate was increased. Also, steep increases in SS and TP were observed with positive correlation with the flow rate while change in TN was slightly shown. On the other hand, in the streams of the lower watershed of South Han river, BOD5 was negatively correlated with the flow rate, being decreased with the increase in the flow rate. However, changes in CODMn, TN, SS, and TP showed a similar trend with those observed in the upper watershed. With Factor Analysis of the water quality and various components, it was appeared that the flow rate, SS, and TP were significantly correlated each other and they were indicated as the principal component influencing on water quality in the streams of the upper watershed. In contrast, BOD5, CODMn, and TOC were significantly correlated each other and they were included as the principal pollution component of the streams in the lower watershed. From these results, it was conclusive that the upper watershed of South Han River was mainly affected by non point source pollutants while the lower watershed was influenced by point source pollutants from the developed areas.