Temporal Analysis of Trends in Dissolved Organic Matter in Han River Water

  • Lee, Hye-Won (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • Choi, Jung-Hyun (Department of Environmental Science and Engineering, Ewha Womans University)
  • Published : 2009.12.31


This study used the extensive monitoring datasets of the Korea Ministry of Environment to examine trends in dissolved organic carbon (DOC) in Han River raw water. To estimate the organic contents of water, we adopted allied parameters such as biochemical oxygen demand (BOD) and chemical oxygen demand (COD) as substitutes for DOC. Spatial and temporal analyses were performed on monthly BOD and COD data from 36 monitoring stations (14 for Main Han River, 7 for North Han River and 15 for South Han River) measured from 1989 to 2007. The results of trend analysis indicated that, on the whole, water quality according to BOD showed a downward trend at more than 67% of monitoring stations (9 for Main Han River, 6 for North Han River and 9 for South Han River). However, the water quality of COD showed an upward trend at more than 78% of monitoring stations (8 for Main Han River, 7 for North Han River and 13 for South Han River). The upward trend of COD contrary to the BOD trend indicates that there has been an increase in recalcitrant organic matter in Han River water that is not detectable by means of BOD.


Organic carbon;Trend analysis;Han River;Water quality


  1. Wetzel, R. G., “Gradient-dominated ecosystems - sources and regulatory functions of dissolved organic-matter in fresh-water ecosystems,” Hydrobiologia, 229, 181-198 (1990)
  2. Imai, A., Fukushima, T., Matsushige, K., Kim, Y. H., and Choi, K., “Characterization of dissolved organic matter in effluents from wastewater treatment plants,” Water Res., 36(4), 859-870 (2002)
  3. Katsoyiannis, A. and Samara, C., “The fate of dissolved organic carbon (DOC) in the wastewater treatment process and its importance in the removal of wastewater contaminants,” Environ. Sci. Pollut. Res., 14(5), 284-292 (2007)
  4. Villanueva, C. M., Cantor, K. P., Cordier, S., Jaakkola, J. J. K., King, W. D., Lynch, C. F., Porru, S., and Kogevinas, M., “Disinfection byproducts and bladder cancer - a pooled analysis,” Epidemiology, 15(3), 357-367 (2004)
  5. Ahmed, A. E., Campbell, G. A., and Jacob, S., “Neurological impairment in fetal mouse brain by drinking water disinfectant byproducts,” Neurotoxicology, 26(4), 633-640 (2004)
  6. Disinfection de l'Eau (Local authorities. Heal and environment briefing pamphlet series no. 3), World Health Organization, Geneva (1995)
  7. “Council Directive 98/83/EC of 3 November 1998 on the quality of water intended for human consumption,” Off. J. Eur. Communities, L330, 32-54 (1998)
  8. “National primary drinking water regulations: stage 2 disinfectants and disinfection byproducts rule,” Fed. Regist., 71(2), 387-493 (2006)
  9. Ministry of Environment Republic of Korea, Water environment of Seoul: The status of the environment in the city of Seoul, Ministry of Environment Republic of Korea, Seoul, (2002)
  10. Worrall, F., Guilbert, T., and Besien, T., “The flux of carbon from rivers: the case for flux from England and Wales,” Biogeochemistry, 86(1), 63-75 (2007)
  11. Lettenmaier, D. P., Hooper, E. R., Wagoner, C., and Faris, K. B., “Trends in stream quality in the continental United States, 1978-1987,” Water Resour. Res., 27(3), 327-339 (1991)
  12. Ye, L., Han, X. Q., Xu, Y. Y., and Cai, Q. H., “Spatial analysis for spring bloom and nutrient limitation in Xiangxi bay of three Gorges Reservoir,” Environ. Monit. Assess., 127(1-3), 135-145 (2007)
  13. Zipper, C. E., Holtzman, G. L., Darken, P. F., Gildea, J. J., and Stewart, R. E., “Virginia USA water quality, 1978 to 1995: Regional interpretation,” J. Am. Water Resour. Assoc., 38(3), 789-802 (2002)
  14. Chang, H. J., “Spatial and temporal variations of water quality in the Han River and its tributaries, Seoul, Korea, 1993-2002,” Water Air Soil Pollut., 161(1-4), 267-284 (2005)
  15. Boeder, M. and Chang, H. J., “Multi-scale analysis of oxygen demand trends in an urbanizing Oregon watershed, USA,” J. Environ. Manage., 87(4), 567-581 (2008)
  16. Chang, H. J., “Spatial analysis of water quality trends in the Han River basin, South Korea,” Water Res., 42(13), 3285-3304 (2008)
  17. Helsel, D. R. and Hirsch, R. M., Statistical methods in water resources, Elsevier, Amsterdam (1992)
  18. Carlson, C. A. and Ducklow, H. W., “Growth of bacterioplankton and consumption of dissolved organic carbon in the Sargasso Sea,” Aquat. Microb. Ecol., 10(1), 69-85 (1996)
  19. Sondergaard, M. and Worm, J., “Measurement of biodegradable dissolved organic carbon (BDOC) in lake water with a bioreactor,” Water Res., 35(10), 2505-2513 (2001)
  20. Malcolm, R. L., “The uniqueness of humic substances in each of soil, stream and marine environments,” Anal. Chim. Acta, 232(1), 19-30 (1990)
  21. Garnett, M. H., Ineson, P., and Stevenson, A. C., “Effects of burning and grazing on carbon sequestration in a Pennine blanket bog, UK,” Holocene, 10(6), 729-736 (2000)
  22. Freeman, C., Evans, C. D., Monteith, D. T., Reynolds, B., and Fenner, N., “Export of organic carbon from peat soils,” Nature, 412(6849), 785 (2001)
  23. Tranvik, L. J. and Jansson, M., “Climate change - Terrestrial export of organic carbon,” Nature, 415(6874), 861-862 (2002)
  24. Williams, P. J. L., “Evidence for the seasonal accumulation of carbon-rich dissolved organic material, its scale in comparison with changes in particulate material and the consequential effect on net C/N assimilation ratios,” Mar. Chem., 51(1), 17-29 (1995)
  25. Muellner, M. G., Wagner, E. D., McCalla, K., Richardson, S. D., Woo, Y. T., and Plewa, M. J., “Haloacetonitriles vs. regulated haloacetic acids: are nitrogen-containing DBPs more toxic?,” Environ. Sci. Technol., 41(2), 645-651 (2007)
  26. Schindler, D. W., Curtis, P. J., Bayley, S. E., Parker, B. R., Beaty, K. G., and Stainton, M. P., “Climate-induced changes in the dissolved organic carbon budgets of boreal lakes,” Biogeochemistry, 36(1), 9-28 (1997)

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