Evaluation of methods for determining infiltration parameters from irrigation advance data

Khatri, K. L. and Smith, R. J. (2005) Evaluation of methods for determining infiltration parameters from irrigation advance data. Irrigation and Drainage, 54 (4). pp. 467-482. ISSN 1531-0361

Abstract

Knowledge of the soil infiltration parameters is of the utmost importance for optimum performance and management of surface irrigation. The advance of the surface flow across a field varies according to the infiltration rate, ultimately determining the soil moisture uniformity and water application efficiency. Calculation of the infiltration parameters from irrigation advance data is now the preferred method. If the process is to be included in a real time control system it must be done accurately, reliably and rapidly, without user intervention, and with a minimum of field data. With this purpose in mind, six infiltration methods were selected for evaluation: the two point method, the computer model INFILT, the method of Upadhyaya and Raghuwanshi, Valiantaz one-point method, Shepard one-point method and a simple linear infiltration function. Field experimental data from 10 furrow irrigation trials was used to evaluate the methods, this data covering a range of soil types and furrow characteristics. The data sets were analyzed to determine infiltration parameters to evaluate the ability of the selected methods for prediction of advance and cumulative infiltration. The results showed INFILT to be the most accurate and reliable method, performing consistently well for all of the data sets. Generally the two-point and linear estimation methods also performed well although the two-point method is handicapped by its requirement for prior knowledge of the steady or final infiltration rate fo. None of the methods proved entirely suitable for use in a real time control system.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Deposited in accordance with the copyright policy of the publisher. Reproduced in accordance with the publisher's copyright policy.
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 11 Oct 2007 00:26
Last Modified: 02 Jul 2013 22:33
Uncontrolled Keywords: infiltration evaluation; surface irrigation; one-point; two-point; linear estimation; INFILT
Fields of Research (FOR2008): 05 Environmental Sciences > 0503 Soil Sciences > 050304 Soil Chemistry (excl. Carbon Sequestration Science)
07 Agricultural and Veterinary Sciences > 0799 Other Agricultural and Veterinary Sciences > 079901 Agricultural Hydrology (Drainage, Flooding, Irrigation, Quality, etc.)
09 Engineering > 0999 Other Engineering > 099901 Agricultural Engineering
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9614 Soils > 961402 Farmland, Arable Cropland and Permanent Cropland Soils
D Environment > 96 Environment > 9611 Physical and Chemical Conditions of Water > 961103 Physical and Chemical Conditions of Water in Fresh, Ground and Surface Water Environments (excl. Urban and Industrial Use)
Identification Number or DOI: doi: 10.1002/ird.198
URI: http://eprints.usq.edu.au/id/eprint/647

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