Potential benefits of increased application of water to paddy fields in Taiwan

The potential benefits of increased application of water to paddy fields in Taiwan are investigated in this paper. A conceptual model is used to represent the hydrological system of the paddy field. A technique is presented to estimate the parameters of the model. Field experiments also are performe...

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Bibliographic Details
Published in:Hydrological processes 2001-06, Vol.15 (8), p.1515-1524
Main Authors: Chang, Yu-Chuan, Kan, Chun-E., Lin, Gwo-Fong, Chiu, Chao-Lin, Lee, Yuan-Chuan
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Exact sciences and technology
hydrological system
Hydrology
Hydrology. Hydrogeology
irrigation
paddy field
parameter estimation
Taiwan
water budget
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Summary:The potential benefits of increased application of water to paddy fields in Taiwan are investigated in this paper. A conceptual model is used to represent the hydrological system of the paddy field. A technique is presented to estimate the parameters of the model. Field experiments also are performed for parameter estimation and model verification. The simulated results are in good agreement with the observed during model verification. With parameters estimated from the field data, the model is used to simulate the effects of applying water beyond current practice. The simulation results show that the downward percolation increases when the irrigation water increases. However, the percolation reaches a capacity rate no matter how large the amount of water applied. This phenomenon results from the existence of a hard layer below the paddy field. The effects of raising the height of levees around paddy fields are also studied. Copyright © 2001 John Wiley & Sons, Ltd.
ISSN:0885-6087
1099-1085
DOI:10.1002/hyp.224