Modelling deep drainage rates of irrigation strategies under cropping sequence in subhumid, subtropical Australia
Article
Article Title | Modelling deep drainage rates of irrigation strategies under cropping sequence in subhumid, subtropical Australia |
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ERA Journal ID | 4213 |
Article Category | Article |
Authors | Kodur, S. (Author) and Robinson, J. B. (Author) |
Journal Title | Irrigation and Drainage |
Journal Citation | 63 (3), pp. 365-372 |
Number of Pages | 8 |
Year | 2014 |
Publisher | John Wiley & Sons |
Place of Publication | United Kingdom |
ISSN | 0971-7412 |
1531-0353 | |
1531-0361 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/ird.1813 |
Web Address (URL) | http://onlinelibrary.wiley.com/doi/10.1002/ird.1813/abstract |
Abstract | Water availability is a major concern for irrigated vegetable cropping in the Lockyer Valley area of Australia. Soil water balance and in particular deep drainage were modelled for a representative site of this area for a range of irrigation scenarios over 12 years of cropping sequence. A scenario that refilled the soil to the drained upper limit (DUL) resulted in 530 mm yr-1 of irrigation, 673 mm yr-1 of transpiration and 84 mm yr-1 of deep drainage, whereas maintaining the soil to DUL+25% and DUL+50%, with soil moisture between DUL and saturation (75 and 50% free water respectively), resulted in similar transpiration but with increased irrigation (up to 717 mm yr-1) and deep drainage (up to 262 mm yr-1). For a given amount of available water, irrigations at fixed intervals were found to be less efficient (reduced crop transpiration) than irrigation scheduled according to a soil water deficit. This highlights the importance of moisture monitoring to optimize irrigation use efficiency. The study suggests solutions to improve irrigation efficiency by minimizing deep drainage under cropping sequences. |
Keywords | deep drainage; HowLeaky modelling; moisture regime; transpiration |
ANZSRC Field of Research 2020 | 400513. Water resources engineering |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Department of Natural Resources and Mines, Queensland |
Department of Environment and Resource Management, Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q38vy/modelling-deep-drainage-rates-of-irrigation-strategies-under-cropping-sequence-in-subhumid-subtropical-australia
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