청주지역의 도심하천인 미호천에서 시공간적 수질변이 특성 및 유입지천의 영향 = ORIGINAL ARTICLE : Spatial and Temporal Variations of Water Quality in an Urban Miho Stream and Some Influences of the Tributaries on the Water Quality

다국어 초록 (Multilingual Abstract)

The objective of study was to analyze seasonal and inter-annual patterns of water chemistry of Miho Stream watershed during 2004 - 2007 along with some influences of tributaries and summer monsoon on the stream water quality. For the study, eight physico-chemical parameters such as nitrogen, phosphorus, BOD, COD and chlorophyll-a (CHL) etc. were analyzed in relation to spatial and temporal variability of seven sampling sites of the mainstream and some tributaries in the watershed. In the upstream reach, Mean of BOD, COD and TP averaged 3.2 mg/L, 6.5 mg/L and 186 μg/L, respectively, indicating an eutrophic conditions as a III-rank in the stream water quality criteria from the Ministry of Environment, Korea(MEK). The eutrophic water was due to a combined effect of Chiljang tributary with high nutrients (TP=844 μg/L, TN=8.087 mg/L) and the point sources from some wastewater treatment plants. In the meantime, BOD, TN, and TP in the downstream reach were about > 1.2-1.5 folds than the values of the midstream reaches. This was mainly attributed to effluents of nutrient rich-water (mean TN: 11.980 mg/L) from two tributaries of Musim Stream and Suknam Stream, which is directly influenced by nearby wastewater disposal plants. Seasonal analysis of water chemistry showed that summer monsoon rainfall was one of the important factors influencing the water quality, and water quality had a large spatial heterogeneity during the rainfall period. In the premonsoon, BOD in the downstream averaged 6.0±2.47 mg/L, which was 1.4-fold greater than the mean of upstream reach. Mean of CHL-a as an indicator of primary productivity in the water body, was > 2.2 - 2.9 fold in the downstream than in the upstream, and this was a result of the high phosphorus loading from the watershed. Overall, our data suggest that some nutrient controls in point-source tributary streams are required for efficient water quality management of Miho Stream.

참고문헌 (Reference)

1 김유표, "형산강 수계의 수질 특성" 한국하천호수학회 43 (43): 150-160, 2010

2 오경섭, "한국 하천 모래톱의 지형학적 의미와 효능 - 낙동강 하곡을 사례로 -" 한국지형학회 18 (18): 1-14, 2011

3 강선아, "영산강 수계의 이화학적 수질에 관한 시공간적 변이 분석" 한국하천호수학회 39 (39): 73-84, 2006

4 이재훈, "어류 군집을 이용한 미호천의 생태 건강성 평가 및 피라미(Zacco platypus)의 총수은 함량" 한국하천호수학회 43 (43): 288-297, 2010

5 안광국, "도심하천 생태계에서의 수질 및 생태건강성 평가" 한국환경생물학회 26 (26): 311-322, 2008

6 이민정, "대전천 수계의 장기 모니터링(2004~2007)에 의한 물리적, 화학적, 생물학적 평가 변수 분석" 한국하천호수학회 42 (42): 364-373, 2009

7 안광국, "금강 수계의 수질 특성" 한국하천호수학회 40 (40): 110-120, 2007

8 Noh, J. W., "Water quality projection of Miho stream considering TMDL" 404-412, 2007

9 Chung, S. J., "Water quality analysis of Miho stream" 18 (18): 37-42, 2001

10 "Water management information system(WAMIS)"

11 Rim, C. S., "The trend and assessment of water pollution from midstream to downstream of the Kum river" 33 (33): 51-60, 2000

12 Shin, S. M., "The research on the water quality of the Miho stream" Korea National University of Education 2001

13 Park, S. M., "The impact of monsoon rainfall on the changes of water quality in the upstream watershed of Southern Han River" Sangji University 2009

14 Kim, J. S., "Survey of water pollution in Geum river watershed. In: Research report of the environmental status in Chungnam province" Chungnam Institute of Health and Environment 55-60, 2001

15 Cho, H, "Sand-gravel bars of mountainous rivers and their genetic association with geomorphological traits of drainage basin" Korea National University of Education 2009

16 MOE, "Report of the national water quality assessment" 5-66, 2011

17 OECD, "Eutrophication of waters, monitoring, assessment and control" Organization for Economic Co-operation and Development 1544-, 1982

18 Jeon, H. T., "Environmental Geography" Seoul National University Publishing Co., Ltd. 145-171, 1998

19 Kim, T. K., "Assessment of propriety for the river water quality standard of Miho Stream" 21 (21): 189-196, 2004

20 Son, J. S., "Application of a watershed model for evaluating efficiencies of non-point pollutants reduction facility" Chongju University 2010

21 Jeon, H. G., "A survey on the water quality and heavy metal contents of the water and plant in Mihochun" Kongju National University 1994

22 Chae, S. J., "A study on water quality at Miho stream" Chongju University, 1992

23 Park, Y. T., "A study on water quality and distribution of benthic algae in the Miho stream" Chongju University 1989