Estimating the furrow infiltration characteristic from a single advance point
Article
Article Title | Estimating the furrow infiltration characteristic from a single advance point |
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ERA Journal ID | 3502 |
Article Category | Article |
Authors | Langat, P. K. (Author), Smith, R. J. (Author) and Raine, S. R. (Author) |
Journal Title | Irrigation Science |
Journal Citation | 26 (5), pp. 367-374 |
Number of Pages | 8 |
Year | 2008 |
Place of Publication | Heidelberg, Germany |
ISSN | 0342-7188 |
1432-1319 | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s00271-008-0102-7 |
Web Address (URL) | http://www.springerlink.com/content/q075xrj7t268h63p/ |
Abstract | Management and control of surface irrigation, in particular furrow irrigation, is limited by spatio-temporal soil infiltration variability as well as the high cost and time associated with collecting intensive field data for estimation of the infiltration characteristics. Recent work has proposed scaling the commonly used infiltration function by using a model infiltration curve and a single advance point for every other furrow in an irrigation event. Scaling factors were calculated for a series of furrows at two sites and at four points down the length of the field (0.25 L, 0.5 L, 0.75 L and L). Differences in the value of the scaling factor with distance were found to be a function of the shape of the advance curves. It is concluded that use of points early in the advance results in a substantial loss of accuracy and should be avoided. The scaling factor was also strongly correlated with the furrow-wetted perimeter suggesting that the scaling is an appropriate way of both predicting and accommodating the effect of the hydraulic variability. |
Keywords | surface irrigation; furrow irrigation; irrigation; hydraulic variability; computation theory; function evaluation; infiltration; mathematical models |
ANZSRC Field of Research 2020 | 490399. Numerical and computational mathematics not elsewhere classified |
300207. Agricultural systems analysis and modelling | |
300201. Agricultural hydrology | |
Public Notes | Deposited in accordance with the copyright policy of the publisher. |
Byline Affiliations | Student Services |
National Centre for Engineering in Agriculture |
https://research.usq.edu.au/item/9yx87/estimating-the-furrow-infiltration-characteristic-from-a-single-advance-point
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