지하수 관개지역 논에서의 배출부하 특성

Characteristics of Pollutant Loading from Paddy Field Area with Groundwater Irrigation

  • 발행 : 2002.09.01

초록

Discharge pattern and water quality were investigated in the drainage water from about 10 ha of groundwater-irrigated paddy field in the growing season of 2001. Total discharge quantity was about 1,117.2 mm in which about 75% was caused by management drainage due to cultural practice of paddy rice farming and the rest by rainfall runoff where total rainfall was about 515 mm. Dry-day sampling data showed wide variations in constituent concentrations with average of 26.14 mg/L, 0.37 mg/L, 3.54 mg/L at the inlet, and 43.60 mg/L, 0.34 mg/L, 3.58 mg/L at the outlet for CO $D_{cr}$ , T-P, and T-N, respectively. Wet-day sampling data demonstrated that generally CO $D_{cr}$ followed the discharge pattern and T-P was in opposite to the discharge pattern, but T-N did not show apparent pattern to the discharge. Discharge and load are in strong relationship. And based on regression equation, pollutant loads from groundwater irrigation area are estimated to be 288.34, 1.17, and 5.45 kg/ha for CO $D_{cr}$ , T-P, and T-N, respectively, which was relatively lower than the literature value from surface water irrigation area which implies that groundwater irrigation area might use less irrigation water and result in less drainage water, Therefore, total pollutant load from paddies irrigation with groundwater could be significantly lower than that with surface water. This study shows that agricultural drainage water management needs a good care of drainage outlet as well as rainfall runoff. This study was based on limited monitoring data of one year, and further monitoring and successive analysis are recommended for more generalized conclusion.

키워드

참고문헌

  1. APHA, 1995, Standard Methods for the examination of water and wastewater, 19th Edition. American Public Health Association, Standard Method
  2. Cho, J. Y., Han, K. W., Choi, J. K., Goo, J. W., Son, J. G. 2000. Runoff Loading of Nutrients from a Paddy Field during Non-Cropping Season. Journal of the KSAE 42 (2): 63-70. (in Korean)
  3. Hong, S. K., Kwun, S. K. 1989. Characteristics of Pollutant Loading into Streams from Flooded Paddies - On the Special Reference to Total Kjeldahl Nitrogen and Total phosphorous. Journal cf the KSAE 31(3):92-102. (in Korean)
  4. Huber, W. C. and R. E. Dickinson, 1988, Stom Water Management Model, version 4: user's manual EPA/600/3-88/001a
  5. Hwang, H. S. 2002. Mass Balance Analysis and Loading Estimate of Nutrients in Paddy Field Area. M.S. Konkuk univercity
  6. Jeon, J. H., Yoon, C. K., Ham, J. H. 2001. Analysis of Relationships Among the Pollutant Concentrations in Non-urban Area. Korea Journal of Limnology 34(3): 215-223
  7. Kim, J. S., Oh, S. Y., Kim, K. S. 1999. Characteristics of Concentration and Load of Nitrogen and Phosphorus in Paddy Field Area. Journal of the KSAE 41(4): 47- 56. (in Korean)
  8. Kwun, S. K., Kim, H. T. 1993. A Study on the Characteristics of Water Pollution in Rural Areas. Korea Journal of Environmental Agriculture 12(2): 129-143. (in Korean
  9. Kwun, S. K., Kim, B. Y., Kim, J. S., Kim, T. C., Yoon, C. G., Jung, J. C., Hong, S. G. 1998. Rural Evironmental Engineering. Seoul : Hyangmoonsa
  10. Shin, D. S., Kwun, S. K. 1990. The Concentration and Input / Output of Nitrogen and Phosphorus in Paddy Fields. Korea Journal of Environmental Agriculture 9(2): 133-141. (in Korean)
  11. Yoon, C. K. 2001 The eco-enviromental management and development of treatment for drainage paddy fields