Abstract
Terraced paddy fields play a crucial role in water and soil conservation because their water-storage capacity reduces flood peaks in mountainous areas. The water-storage capacity of a paddy field is mainly dependent on the size of the field, the height of the bund, and the outlet within the bund. However, the height of the bund and outlet can be reduced due to a lack of maintenance, especially when rice paddies have been abandoned. This study assessed the flood-control function of a terraced paddy field during heavy-rainfall events. The four-layered tank model calibrated by in situ rainfall-runoff measurements was applied to determine the effects of reducing the height of the bund and the outlet within the bund, on the drainage peak flow of terraced fields. The simulation results from two heavy-rainfall events indicated the excellent flood-control function of terraced paddy fields. The simulation results showed that the drainage peak flow underwent considerable changes when the height of the bund and outlet was reduced by more than 50%. Therefore, sustainable rice planting in the terraced paddies or maintenance of the water-storage capability in abandoned arable land is necessary to release downstream flood pressure. Editor D. Koutsoyiannis; Associate editor S. YueCitation Chen, S.-K., Chen, R.-S., and Yang, T.-Y., 2014. Application of a tank model to assess the flood-control function of a terraced paddy field. Hydrological Sciences Journal, 59 (5), 1020-1031.
| Translated title of the contribution | Application of a tank model to assess the flood-control function of a terraced paddy field |
|---|---|
| Original language | English |
| Pages (from-to) | 1020-1031 |
| Number of pages | 12 |
| Journal | Hydrological Sciences Journal |
| Volume | 59 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 2014 |
Bibliographical note
Funding Information:Funding The authors would like to thank the Council of Agriculture of the Republic of China for financially supporting this research under the project “Analysis and Evaluation of the Multifunctionality and Economic Benefits of Paddy Fields”.
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 15 Life on Land
Keywords
- bund
- rainfall-runoff
- tank model
- terraced paddy field
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