Accounting for temporal inflow variation in the inverse solution for infiltration in surface irrigation |
| |
| Authors: | M H Gillies R J Smith S R Raine |
| |
| Institution: | (1) National Centre for Engineering in Agriculture and Cooperative Research Centre for Irrigation Futures, University of Southern Queensland, Toowoomba, QLD, 4350, Australia |
| |
| Abstract: | A simple modification of the volume balance equation of the IPARM model is presented to facilitate the use of variable inflow.
Traditional approaches for estimating infiltration from advance and/or runoff have merely considered the constant or step
inflow case. Whenever this assumption is violated, significant uncertainty is introduced into the estimated infiltration parameters.
Evaluation of the procedure with a number of data sets has demonstrated significant improvements in the estimates of infiltration
parameters. Furthermore, the technique has shown that a portion of the apparent variability in estimated soil intake rates
between furrows in the same field is a consequence of the constant inflow assumption. Accounting for the variable inflow to
estimate infiltration functions, both standardised the shape of the infiltration curve and reduced the magnitude of the variation
between curves. The proposed technique remains restricted by limitations similar to that of other volume balance models but
offers greater performance under typical inflow variations often experienced in practice. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
