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Potential benefits of increased application of water to paddy fields in Taiwan
Author(s) -
Chang YuChuan,
Kan ChunE.,
Lin GwoFong,
Chiu ChaoLin,
Lee YuanChuan
Publication year - 2001
Publication title -
hydrological processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.222
H-Index - 161
eISSN - 1099-1085
pISSN - 0885-6087
DOI - 10.1002/hyp.224
Subject(s) - percolation (cognitive psychology) , paddy field , irrigation , environmental science , current (fluid) , levee , soil science , hydrology (agriculture) , agricultural engineering , field (mathematics) , mathematics , geology , geotechnical engineering , agronomy , engineering , neuroscience , pure mathematics , oceanography , biology
Abstract 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.