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Influence of the Asian Monsoon on Seasonal Fluctuations of Water Quality in a Mountainous Stream  

Shin, In-Chul (Chungnam Health and Environmental Research Institute)
An, Kwang-Guk (School of Bioscience and Biotechnology, Chungnam National University)
Publication Information
Korean Journal of Ecology and Environment / v.38, no.1, 2005 , pp. 54-62 More about this Journal
Abstract
The present study was to determine how seasonal rainfall intensity influences nutrient dynamics, ionic contents, oxygen demands, and suspended solids in a lotic ecosystem. Largest seasonal variabilities in most parameters occurred during the two months of July to August and these were closely associated with large spate of rainfall. Dissolved oxygen (DO) had an inverse function of water temperature (r = = = - 0.986, p<0.001). Minimum pH values of<6.5 were observed in the late August when rainfall peaked in the study site, indicating an ionic dilution of stream water by precipitation. Electrical conductivity (EC) was greater during summer than any other seasons, so the overall conductivity values had direct correlation (r = 0.527, p<0.01) with precipitation. Ionic dilution, however, was evident 4 ${\sim}$ 5 days later in short or 1 ${\sim}$ 2 weeks in long after the intense rain, indicating a time-lag phenomenon of conductivity. Daily COD values varied from 0.8 mg $L^{-1}$ to 7.9 mg $L^{-1}$ and their seasonal pattern was similar (r = 0.548, p<0.001) to that of BOD. Total nitrogen (TN) varied little compared to total phosphorus (TP) and was minimum in the base flow of March. In contrast, major input of TP occurred during the period of summer monsoon and this pattern was similar to suspended solids, implying that TP is closely associated (r = 0.890, p<0.01) with suspended inorganic solids. Mass ratios of TN : TP were determined by TP (r= -0.509, p<0.01) rather than TN (r= -0.209, p<0.01). The N : P ratios indicated that phosphorus was a potential primary limiting nutrient for the stream productivity. Overall data suggest that rainfall intensity was considered as a primary key component regulating water chemistry in the stream and maximum variation in water quality was attributed to the largest runoff spate during the summer monsoon.
Keywords
ionic dilution; monsoon rain; nutrients; stream; water chemistry;
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  • Reference
1 강태호. 1998. 도시하천에서의 강우와 유출 및 수질 예측기법 개발에 관한 연구, 경기대학교 토목대학원 박사학위논문, p. 2-16
2 김범철, 김윤희. 2004. 아시아 몬순지역의 대형댐(소양호)에서 의 인순환과 2차원모델의 적용. 한국육수학회지 37(2): 205-212
3 An, K-G. and D.S. Kim. 2003. Response of lake water quality to nutrient inputs from various streams and in-lake fishfarms. Water, Air, and Soil Pollution 149 (1-4): 27-49   DOI   ScienceOn
4 An, K-G. and S.S. Park. 2002. Indirect influence of the summer monsoon on chlorophyll-total phosphorus models in reservoirs: A case study. Ecological Modelling 152(2-3): 191-203   DOI   ScienceOn
5 APHA. 1985. Standard methods for the examination of water and wastewater. 16th ed. New York, American Public Health Association. 874pp
6 Grim, N.B. and S.G. Fisher. 1986. Nitrogen limitation in a Sonoran desert stream. J. N. Am. Benthol. Soc. 5: 2-15   DOI   ScienceOn
7 금강환경관리청. 1999. 금강 중역권 수질오염원 현황. 62 pp
8 Collins, R. and A. Jenkins. 1996. The impact of agricultural land use on stream chemistry in the Middle Hills of the Himalayas. J. of Hydrology 185: 71-86   DOI   ScienceOn
9 Dodds, W.K, J.R. Jones and E.B. Welch. 1998. Suggested classification of stream trophic state: Distributions of temperate stream types by chlorophyll, total nitrogen, and phosphorus. Wat. Res. 32(5): 1455-1462   DOI   ScienceOn
10 신재기, 황순진, 조경제. 2003. 평택호와 주요 하천의 수환경 및 오염도평가. 한국육수학회지 36(1): 38-47
11 Ostry, R.C. 1982. Relationship of water quality and pollutant to land uses in adjoining watershed. Water Res. Bull. 18: 99-104   DOI
12 안광국, 정승현, 최신석. 2001. 생물보전지수(Index of Biological Integrity) 및 서식지평가지수 (Qualitative Habitat Evaluation Index)를 이용한 평창강의 수환경 평가. 한국육수학회지 34: 153-165
13 An, K-G. and J.R. Jones. 2000. Temporal and spatial patterns in ionic salinity and suspended solids in a reservoir influenced by the Asian monsoon. Hydrobiologia 436: 179-189   DOI   ScienceOn
14 Allan, J.D. 1995. Stream ecology: structure and function of running waters. Chapman and Hall Pub. 1st Eds, pp. 388
15 Meyer, J.L., W.H. McDowell, T.L. Bott, J.W. Elwwood, C. Ishizaki, J.M. Melack and P.A. Rublee. 1988. Elemental dynamics in streams. J. N. Benthol. Soc. 7: 410- 432   DOI   ScienceOn
16 Cameron, E.M. 1996. Hydrogeochemistry of Fraser River, British Columbia: seasonal variation in major and minor components. J. of Hydrology 182: 209-225   DOI   ScienceOn
17 An, K-G. 2000b. An influence of point-source and flow events on inorganic nitrogen fraction in a large artificial reservoir. Korean J. Limnol. 33: 350-357
18 An, K-G., J-Y. Shin and S-S Park. 2002. An evaluation of a river health using the Index of Biological Integrity along with relations to chemical and habitat conditions. Environment International 28(5): 411-420   DOI   ScienceOn
19 Dillon, P.J. and F.H. Rigler. 1974. The phosphorus-chlorophyll relationship in lakes. Limnol. Oceanogr. 19: 767- 781   DOI   ScienceOn
20 Perkins, B. and J.R. Jones. 1994. Temporal variability in a midwestern stream during spring. Verh. Internat. Verein. Limnol. 25: 1471-1476
21 An, K-G. 2000a. Dynamic changes of dissolved oxygen during summer monsoon. Korean J. Limnol. 33: 213- 221