Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
권호 표지
DOI QR코드

DOI QR Code

Investigation of Nutrient Release from the Sediments Near Weir in the Namhan River

남한강 보 구간 퇴적물의 영양염류 용출에 관한 연구

  • Kim, Hye Yeon (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • Huh, In Ae (Water Environmental Engineering Research Division, National Institute of Environmental Research) ;
  • Choi, Jung Hyun (Department of Environmental Science and Engineering, Ewha Womans University)
  • 김혜연 (이화여자대학교 환경공학과) ;
  • 허인애 (국립환경과학원 물환경공학연구과) ;
  • 최정현 (이화여자대학교 환경공학과)
  • Received : 2013.04.15
  • Accepted : 2013.08.16
  • Published : 2013.08.30
Download PDF
⟨ Previous Next ⟩

Abstract

The purpose of this study is to evaluate the possibility of nutrient release at up and downstream of Kangchun weir, upstream of Yuju and Ipo weir in Namhan River. For this survey, we measured basic characteristics of the sediments (water content, ignition loss, TOC, TP, SRP, TN, phosphorus fractionation) and conducted nutrients release experiments under both aerobic and anaerobic condition. The overlying water from the sediment-water column was analyzed for nutrients (i.e. TP, $PO_4$-P, TN, $NO_3$-N, $NH_3$-N) everyday for 18days. Result of soil texture experiment showed that sediments are Sand. SRP concentration before the release experiment was different with the value after the release experiment. According to this result, we can find that there were more activated release processes in anaerobic condition. $PO_4$-P increased from 1 to 8 days and remained at the maximum value (7~8 days) afterward. The rapidly increase of $PO_4$-P was observed from 1 to 2~3 days whereas the TP continuously increase from 1 to 18 days. The $PO_4$-P release rate calculated by up to 7~8 days data highly correlated with initial SRP concentration with $R^2$=0.8502. $NO_3$-N release rate appears constantly decreasing trend as -5.7~-3.08 $mg/m^2{\cdot}day$, otherwise the $NH_3$-N release rate, by-product of a organic matter decomposition using nitrate as electron acceptor, was 0.57~2.41 $mg/m^2{\cdot}day$. Substantial portion in TN can be induced by organic nitrogen which originated from the tributary passing through non-point pollutant source. Compared with other similar researches, phosphorus and nitrogen release rates obtained in this study can be considered as relatively low values. Since this study targeted the sediments accumulated by one time of flooding season, there are limitation to generalize theses results. Therefore, it is necessary to consistently monitor and investigate the accumulation of nutrients in the sediment for understanding the effect of weir construction on the overlying water quality.

본 연구의 목적은 보 인접 퇴적물을 대상으로 영양염류의 용출 가능성을 평가함에 있다. 이를 위해 현장 퇴적물을 채취하여 퇴적물 기본 특성(입도, 함수율, 완전연소가능량, TOC, TP, SRP, TN, 존재형태별 인)을 측정하였고, 반연속식 용출조를 운영하여 호기 혐기 조건 하에서 영양염류 용출량을 산정하였다. 퇴적물의 토성은 전 지점에서 Sand를 보였다. 퇴적물의 SRP 농도는 전체적으로 호기보다 혐기에서 용출 후 SRP 함량이 낮게 나타나 혐기에서 상대적으로 활발한 용출이 일어났음을 알 수 있었다. TP 용출의 경우 강천보 상류 혐기조건에서 1.26 $mg/m^2{\cdot}day$로, $PO_4$-P 역시 강천보 상류 혐기조건에서 0.25 $mg/m^2{\cdot}day$로 최대 용출을 보였다. $PO_4$-P 용출율은 초기 2~3일까지 급격하게, TP는 18일까지 지속적으로 증가하였고 전반적으로 증가 경향을 보이는 7~8일 범위 내에서 산정한 $PO_4$-P 용출율은 퇴적물 내 초기 SRP 농도와 $R^2$=0.8502의 값을 보여 높은 상관성을 보였다. 질소 계열 중 $NO_3$-N의 용출율은 -5.7~-3.08 $mg/m^2{\cdot}day$로 일관된 감소 경향을 보였지만 유기물 분해산물인 $NH_3$-N는 0.57~2.41 $mg/m^2{\cdot}day$의 용출율을 보였다. TN의 상당량은 유기 질소 성분으로 추정되며 이는 비점오염원을 거쳐 유입되는 지류의 영향이라고 여겨진다. 본 연구를 통해 측정된 결과는 퇴적된 지 1년 미만의 퇴적물을 대상으로 했기 때문에 연구 결과를 일반화시키기에 한계점이 있다. 따라서, 보에 의한 퇴적물의 축적이 수질에 미치는 영향을 보다 명확하게 파악하기 위해서는 퇴적물 내 쌓이는 영양염류를 지속적으로 모니터링 할 필요성이 있다.

Keywords

References

  1. IPCC, Climate change 2007: the summary of climate change. cambaridge univ. press, cambridge(2007).
  2. Ministry of Land, Infrastructure and Transport, 4 river mater plan report(2009).
  3. Reddy, K. R., Kadlec, R. H., Flaig, E. and Gale, P. M., "Phosphorus Retention in Streams and Wetlands: A Review," Critical Rev. Environ. Sci. Technol., 29(1), 83-146(1999). https://doi.org/10.1080/10643389991259182
  4. Reddy, K. R., Diaz, O. A., Scinto, L. J. and Agami, M., "Phosphorus dynamics in selected wetlands and streams of the lake Okeechobee Basin," Ecol. Eng., 5, 183-207(1995). https://doi.org/10.1016/0925-8574(95)00024-0
  5. Kim, D.-H., "A study on the measurement of nutrients release from sediment," J. Environ. Sci., 11(12), 1333-1337(2002).
  6. David, L. C., "The Role of Phosphorus in the Eutrophication of Receiving Waters: A Review," J. Environ. Qual., 27 (2), 261-266(1998).
  7. Cho, Y.-C. and Chung, S.-W., "Sediment Release Rate of Nutrients from Namyang Reservoir," J. Kor. Soc. Environ. Eng., 29(12), 1345-1352(2007).
  8. Jung, H.-Y. and Cho, K.-J., "SOD and Inorganic Nutrient Fluxes from Sediment in the Downstream of the Nagdong River," Kor. J. Limnol., 36(3), 322-335(2003).
  9. Ki, B.-M., Lim, B.-M., Na, E.-H. and Choi, J.-H., "A Study on the Nutrient Release Characteristics from Sediments in the Asan Reservoir," J. Kor. Soc. Environ. Eng., 32(1), 1169- 1176(2010).
  10. Jang, M.-D., "A study on mechanism of An-dong Lake Eutrophication," Kundong University 9th collection of dissertations, pp. 181-195(2001).
  11. Kim, L. H., Choi, E., Gil, K. I. and Strenstrom, M. K., "Phosphorus release rates from sediments and pollutant characteristics in Han River, Seoul, Korea," Sci. Total Envi ron., 321, 115-125(2004). https://doi.org/10.1016/j.scitotenv.2003.08.018
  12. Ahn, T.-W., Jung, J.-H., Kim, T.-H., Kim, S.-W., Cho, I-S. and Oh, J.-M., "A study on the Characteristic of Pollutants of Water Quality and Sediments in Gul-po Stream Basin," J. Kor. Soc. Environ. Eng., 34(7), 495-503(2012). https://doi.org/10.4491/KSEE.2012.34.7.495
  13. Kang, M.-K., Choi, I.-Y., Park, J.-H., Choi, J.-H., "Investigation of the Effect of Weirs Construction in the Han River on the Characteristics of Sediments" J. Kor. Soc. Environ. Eng., 34(9), 597-603(2012). https://doi.org/10.4491/KSEE.2012.34.9.597
  14. Chang, S. C. and Jackson, M. L., "Fractionation of soil phosphorus," Soil Sci., 84, 133-144(1957). https://doi.org/10.1097/00010694-195708000-00005
  15. Hieltjes, A. H. M. and Lijklema, L., "Fractionation of Inorganic Phosphates in Calcareous Sediments," J. Environ. Qual., 9(3), 405-407(1980).
  16. Kim, E.-H. and Kim, H.-S., "A study on release characteristics and forms of phosphorus in sediments," Kor. J. Sanitat., 17(1), 75-80(2002).
  17. Jung, W.-H. and Kim, G.-H., "Speciation of Phosphorus dependent upon pH and Oxidation Reduction Potential in Overlying Water and Sediment," J. Kor. Soc. Environ. Eng., 28 (5), 472-479(2006).
  18. Huang, Q. H., Wang, Z. J., Wang, D. H., Wang, C. X., Ma, M. and Jin, X. C., "Origins and Mobility of Phosphorus Forms in the Sediments of Lakes Taihu and Chaohu, China," J. Environ. Sci. Health, Part A : Toxic/Hazard. Subs. Environ. Eng., 40(1), 91-102(2005). https://doi.org/10.1081/ESE-200033593
  19. Moore, P. A. Jr. and Reddy, K. R., "Role of Eh and pH on Phosphorus Geochemistry in Sediments of Lake okeechobee, Florida," J. Environ. Qual., 23, 955-964(1994).
  20. Lee, S.-E., Choi, I-S., Lee, S.-K., Lee, I.-H. and Oh, J.-M., "The evaluation of pollution level and release characteristics by inner productivity in the sediment of lake," J. Environ. Impact Ass., 21(1), 81-91(2012).
  21. Cho, D.-C., Lee, E.-M., Park, B.-G. and Kwon, S.-H., "Correlation of Releases of Nutrient Salts in Sediment with Vicinal Oxic Conditions," J. Environ. Sci., 20(7), 845-855 (2011).
  22. Min, Y.-H., Hyun, D.-Y., Eum, C.-H. and Lee, S.-H., "A study on the relationship between concentration of phosphorus, turbidity, and pH in water and soil," Anal. Sci. Technol., 24(4), 304-309(2011). https://doi.org/10.5806/AST.2011.24.4.304
  23. Kim, G.-H., Jeong, W.-H. and Choi, S.-H., "Effects of Water Circulation on the Phosphorus Release Rate from Sediments in the Lake," J. Kor. Soc. Water Qual., 21(6), 595- 601(2005).
  24. Water Information System Homepage(http://water.nier.go.kr).

Cited by

  1. Spatio-Temporal Variations in Stream-Aquifer Interactions Following Construction of Weirs in Korea vol.54, pp.3, 2015, https://doi.org/10.1111/gwat.12373
  2. Laboratory Study of Phosphorus Fractionation in the Sediments of Yeongsan River vol.39, pp.9, 2017, https://doi.org/10.4491/KSEE.2017.39.9.519