Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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An Analysis of Drainage Characteristics at Large-Sized Paddy Fields Using a Two-Dimensional Numerical Model

2차원 유한체적 수치모형을 이용한 대구획 논의 배수특성 분석

  • 박승우 (서울대학교 농업생명과학대학 생물자원공학부) ;
  • 박종민 (농림부) ;
  • 강민구 (한국수자원공사 수자원연구원)
  • Published : 2004.05.30
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Abstract

A two-dimensional numerical model based on a finite volume method was formulated to solve the shallow water equations and applied for evaluating drainage characteristics at large-sized paddy fields. Manning roughness coefficient was calibrated using the observed inundating depths at drainage tests, and used for validating the model with the results from another drainage test. The simulated results were in good agreement with the observed inundating depths. The result of surface drainage showed that the longer width of the outlet was or the more the number of drainage outlet was, the shorter the drainage time was taken, and the larger the size of the field become, the longer the drainage time was taken, and the field shape had little effect on drainage time. To reduce the drainage time to 24 hours, the outlet is located lower than the elevation of the basin and small drainage ditch is constructed at the field. The results showed that the drainage time was taken short as the small drainage ditch was constructed. The comparison of drainage time as to the size of field constructed small drainage ditch showed the field, 100m ${\times}$ 200 m, can be drained in 24 hours.

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References

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  1. Water footprint for Korean rice products and virtual water trade in a water-energy-food nexus vol.43, pp.6, 2018, https://doi.org/10.1080/02508060.2018.1515570