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http://dx.doi.org/10.14249/eia.2015.24.5.407

Comparison of Unit Load from Paddy Field by Various Estimation Methods  

Choi, Dongho (Department of Rural & Bio-Systems Engineering, Chonnam National University)
Jung, Jaewoon (Jeollanamdo Environmental Industries Promotion Institute)
Yoon, Kwangsik (Department of Rural & Bio-Systems Engineering, Chonnam National University)
Choi, Woojung (Department of Rural & Bio-Systems Engineering, Chonnam National University)
Cho, Sohyun (Yeongsan River Environment Research Center, National Institute of Environmental Research)
Beom, Jina (Yeongsan River Environment Research Center, National Institute of Environmental Research)
Yoo, Seungwha (Yeongsan River Environment Research Center, National Institute of Environmental Research)
Publication Information
Journal of Environmental Impact Assessment / v.24, no.5, 2015 , pp. 407-419 More about this Journal
Abstract
The unit load of paddy field was estimated by several methods and compared in this study. Four year field study was conducted at the paddy fields located in Yeongsan river and Sumjin river basins. The unit load was estimated by four methods; (1) averaging field monitored load; (2) NIER (National Institute of Environmental Research) method which use EMC(Event Mean Concentration) and runoff ratio of rainfall groups with rainfall weighting factors; (3)method using EMC determined by best fit probability distribution; (4)method using arithmetic mean EMC and runoff ratio. The result of this study showed that the unit loads of water quality constituents by field monitoring was similar to those of NIER method whereas those by probability distribution(log-normal, gamma) method were less than unit loads of NIER method. The unit loads by arithmetic mean EMC and runoff ratio were larger than those by NIER method. The unit load by NIER method showed higher BOD, COD, SS, lesser T-N, and similar T-P values when compared to unit loads determined by MOE in 1995.
Keywords
paddy field; unit load; EMC; probability distribution; runoff ratio;
Citations & Related Records
Times Cited By KSCI : 13  (Citation Analysis)
연도 인용수 순위
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