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Development and evaluation of a paddy module for improving hydrological simulation in SWAT

Author

Listed:
  • Sakaguchi, A.
  • Eguchi, S.
  • Kato, T.
  • Kasuya, M.
  • Ono, K.
  • Miyata, A.
  • Tase, N.

Abstract

The soil and water assessment tool (SWAT) is becoming a popular tool for modeling watershed-scale hydrological and chemical transport in Asia, where paddy rice is cultivated in typical agricultural management systems. In this study, a paddy module was developed by modifying an algorithm designed for pothole landscapes in SWAT. To simulate the percolation processes in paddy fields, a new parameter, the ‘potential percolation rate of the paddy field,’ was introduced which determines the upper limit of the rate of percolation into the subsoil. The potential percolation rate was calibrated to fit the observed flow rate of a stream. In addition, the ponding-releasing process was varied to simulate a winter paddy field. Moreover, the irrigation process was modified to avoid overflows from paddy fields during irrigation management. Furthermore, the evaporation process was modified in accordance with the evaporation rate observed at a paddy field. The developed paddy module was tested by applying it to a 3km2 watershed in which paddy fields comprise 18% of the total area. It was concluded that the water balance in the irrigated paddy fields was reasonably modeled by the modified SWAT with the developed paddy module and that the modified SWAT is effective for watershed-scale modeling for watersheds containing paddy fields.

Suggested Citation

  • Sakaguchi, A. & Eguchi, S. & Kato, T. & Kasuya, M. & Ono, K. & Miyata, A. & Tase, N., 2014. "Development and evaluation of a paddy module for improving hydrological simulation in SWAT," Agricultural Water Management, Elsevier, vol. 137(C), pages 116-122.
    • Handle: RePEc:eee:agiwat:v:137:y:2014:i:c:p:116-122
    DOI: 10.1016/j.agwat.2014.01.009
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    References listed on IDEAS

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    1. Kang, M.S. & Park, S.W. & Lee, J.J. & Yoo, K.H., 2006. "Applying SWAT for TMDL programs to a small watershed containing rice paddy fields," Agricultural Water Management, Elsevier, vol. 79(1), pages 72-92, January.
    2. Gassman, Philip W. & Reyes, Manuel R. & Green, Colleen H. & Arnold, Jeffrey G., 2007. "The Soil and Water Assessment Tool: Historical Development, Applications, and Future Research Directions," ISU General Staff Papers 200701010800001027, Iowa State University, Department of Economics.
    3. Immerzeel, W.W. & Gaur, A. & Zwart, S.J., 2008. "Integrating remote sensing and a process-based hydrological model to evaluate water use and productivity in a south Indian catchment," Agricultural Water Management, Elsevier, vol. 95(1), pages 11-24, January.
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    Cited by:

    1. Yan, Renhua & Gao, Junfeng & Huang, Jiacong, 2016. "WALRUS-paddy model for simulating the hydrological processes of lowland polders with paddy fields and pumping stations," Agricultural Water Management, Elsevier, vol. 169(C), pages 148-161.
    2. Wu, Di & Cui, Yuanlai & Wang, Yitong & Chen, Manyu & Luo, Yufeng & Zhang, Lei, 2019. "Reuse of return flows and its scale effect in irrigation systems based on modified SWAT model," Agricultural Water Management, Elsevier, vol. 213(C), pages 280-288.
    3. Dash, Sonam Sandeep & Sahoo, Bhabagrahi & Raghuwanshi, Narendra Singh, 2023. "SWAT model calibration approaches in an integrated paddy-dominated catchment-command," Agricultural Water Management, Elsevier, vol. 278(C).
    4. Ryota Tsuchiya & Tasuku Kato & Jaehak Jeong & Jeffrey G. Arnold, 2018. "Development of SWAT-Paddy for Simulating Lowland Paddy Fields," Sustainability, MDPI, vol. 10(9), pages 1-19, September.
    5. Kim, Dong-Hyeon & Jang, Taeil & Hwang, Syewoon & Jeong, Hanseok, 2021. "Paddy rice adaptation strategies to climate change: Transplanting date shift and BMP applications," Agricultural Water Management, Elsevier, vol. 252(C).
    6. Seoro Lee & Youn Shik Park & Jonggun Kim & Kyoung Jae Lim, 2023. "Enhanced Hydrological Simulations in Paddy-Dominated Watersheds Using the Hourly SWAT-MODFLOW-PADDY Modeling Approach," Sustainability, MDPI, vol. 15(11), pages 1-21, June.
    7. Kim, Jihye & Kim, Hakkwan & Kim, Sinae & Jang, Taeil & Jun, Sang-Min & Hwang, Soonho & Song, Jung-Hun & Kang, Moon-Seong, 2022. "Development of a simulation method for paddy fields based on surface FTABLE of hydrological simulation program–FORTRAN," Agricultural Water Management, Elsevier, vol. 271(C).

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