Soil-hydrological responses to rainfall variation in a subtropical Australian landscape
Article
Article Title | Soil-hydrological responses to rainfall variation in a subtropical Australian landscape |
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ERA Journal ID | 4213 |
Article Category | Article |
Authors | Kodur, S. (Author), Robinson, J. B. (Author), Foley, J. L. (Author) and Silburn, D. M. (Author) |
Journal Title | Irrigation and Drainage |
Journal Citation | 64 (5), pp. 694-702 |
Number of Pages | 9 |
Year | 2015 |
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.1946 |
Web Address (URL) | http://onlinelibrary.wiley.com/doi/10.1002/ird.1946/abstract |
Abstract | Reliable water supply for farming is a global concern, including the Lockyer Valley region, Australia. Knowledge of rainfall variation and resulting irrigation demand and deep drainage can improve crop water use and minimize salinity. Therefore, we modelled irrigation demand and deep drainage for different land-use types of the Lockyer Valley and classified them according to rainfall. During the periods of extremely low rainfall (mean = 468 mm yr-1), deep drainage fell by 35–239 mm yr-1, whereas irrigation demand rose by 160–310 mm yr-1, relative to extremely high rainfall (1138 mm yr-1). With all land-use types, deep drainage rose with water input, but it was consistent in the order (mean, mm yr-1): lucerne (8–11), native grass (13), sorghum–wheat sequence (37–64), bare fallow (169) and sweetcorn–broccoli–bean sequence (225). Decadal trends in irrigation demand and deep drainage signalled a raising future irrigation demand; and in turn potential deep drainage risks if irrigation is not managed wisely. These findings will have broader implications for crop and environment management under rainfall variation. |
Keywords | climate; drainage; irrigation; modelling; water balance |
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/q38v8/soil-hydrological-responses-to-rainfall-variation-in-a-subtropical-australian-landscape
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