Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
권호 표지
DOI QR코드

DOI QR Code

Modeling System for Unsteady Flow Simulations in Drainage Channel Networks of Paddy Field Districts

논 지구의 배수로 부정류 흐름 모의를 위한 모델링 시스템

  • Received : 2013.08.14
  • Accepted : 2014.01.28
  • Published : 2014.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

A modeling system is constructed by integrating an one-dimensional unsteady flow simulation model and a hydrologic model to simulate flood flows in drainage channel networks of paddy field districts. The modeling system's applicability is validated by simulating flood discharges from a paddy field district, which consists of nine paddy fields and one drainage channel. The simulation results are in good agreement with the observed. Particularly, in the verification stage, the relative errors of peak flows and peak depths between the observed and simulated hydrographs range 8.96 to 10.26 % and -10.26 to 2.97 %, respectively. The modeling system's capability is compared with that of a water balance equation-based model; it is revealed that the modeling system's accuracy is superior to the other model. In addition, the simulations of flood discharges from large-sized paddy fields through drainage channels show that the flood discharge patterns are affected by drainage outlet management for paddy fields and physical characteristics of the drainage channels. Finally, it is concluded that to efficiently design drainage channel networks, it is necessary to analyze the results from simulating flood discharges of the drainage channel networks according to their physical characteristics and connectivities.

Keywords

References

  1. Choi, J. K, H. Y. Kim, and J. G. Son, 1997. A study on the outlet drain discharge from paddy field. Journal of the Korean Society of Agricultural Engineering 39(2): 134-142 (in Korean).
  2. Fread, D. L., 1984. National Weather Service operational dynamic wave model, National Weather Service, NOAA, Silver Spring, MD.
  3. Hayase, Y., and M. Kadoya, 1993. Runoff analysis by the diffusive tank model in a low-lying drainage basin (1)-(3). Transaction of the Japanese Society of Irrigation Drainage and Reclamation Engineering 165: 75-99 (in Japanese).
  4. Jang, T. I., H. K. Kim, S. J. Im, and S. W. Park, 2010. Simulations of storm hydrographs in a mixed-landuse watershed using a modified TR-20 model. Agricultural Water Management 97: 201-207. https://doi.org/10.1016/j.agwat.2009.09.004
  5. Kim, C. G., S. W. Park, and S. J. Im, 2000. Runoff hydrograph synthesis from small watersheds considering hydrological characteristics of irrigated rice paddies. Journal of the Korean Society of Agricultural Engineering 42(6): 56-62 (in Korean).
  6. Kim, H. Y., C. S. Hwang, S. M. Kang, and K. Y. Lee, 1998. Development of Flood Analysis System (FAS) based on runoff characteristics of paddy basin. Proceedings of the Korean Society of Agricultural Engineering: 34-40 (in Korean).
  7. Kim, S. M., C. M. Park, and S. W. Park, 2004. Applications of a GIS-based paddy inundation simulation system. Journal of the Korean Society of Agricultural Engineering 46(5): 107-116 (in Korean).
  8. Ministry of Agriculture and Forestry (MAF), 1997. Develoment of flood analysis sytem for drainage improvement. Seoul, Korea.
  9. Ministry for Food, Agriculture, Forestry and Fisheries and Korea Rural Comunity Corporation (MFAFF and KRC), 2012. Statistical yearbook of land and water development for agriculture. Seoul, Korea.
  10. The Japanese Society of Irrigation, Drainage and Reclamation Engineering (JSIDRE), 1999. Advanced paddy field engineering. Shinzan-Sha Sci. & Tech. Publishing Co., Tokyo, Japan.