Paper Information

Journal:   WATER ENGINEERING   SUMMER 2013 , Volume 6 , Number 17; Page(s) 53 To 62.
 
Paper: 

ASSESSMENT OF VARIATIONS OF THREE INFILTRATION MODELS FOR FURROW IRRIGATION

 
Author(s):  EMDAD M.R.*
 
* SOIL AND WATER RESEARCH INSTITUTE, TEHRAN, IRAN
 
Abstract: 

Soil infiltration rate is the most important factor in designing irrigation systems. Therefore, selection of a suitable infiltration equation is a prerequisite for achieving the best performance of any irrigation system. As a plant's performance integrates numerous factors, particularly water demand in arid environments, providing adequate and timely water in irrigated fields passes a challenge. In this regard, the coefficients of three popular infiltration equations, namely: Kostiakov-Lewis, Philip and SCS, were investigated along the volume balance equation. The cumulative infiltration depths in furrows planted with sweat com were also compared using ' different equations. Three periods: first, mid and end of maize growth season were considered in this study. Results indicated that the application of Philip equation (one point method) was not applicable because it over-predicted the infiltration depths. Moreover, the mean absolute error (AAE) of the Philip equation (0.00683) and SCS equation (0.00373) were larger than that of the Kostiakov-Lewis equation (0.00253). Finally, the results revealed that the Kostiakov-Lewis equation were the best predictor of the three infiltration equations used in this study.

 
Keyword(s): VOLUME BALANCE, INFILTRATION, FURROWS IRRIGATION, KOSTIAKOV-LEWIS, PHILIP AND SCS
 
References: 
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