SCALING AND PREDICTION OF SOIL MOISTURE PROFILE DURING REDISTRIBUTION PHASE

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SADEGHI MORTEZA; GHAHRAMAN B.; DAVARI KAMRAN

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Journal: Journal of Water and Soil Year:2008 | Volume:22 | Issue:2 Page(s): 417-431

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Information Journal Paper

Title

SCALING AND PREDICTION OF SOIL MOISTURE PROFILE DURING REDISTRIBUTION PHASE

Author(s)

SADEGHI MORTEZA | GHAHRAMAN B. | DAVARI KAMRAN | Issue Writer Certificate

Keywords

SCALINGQ2

SOIL MOISTURE PROFILEQ3

REDISTRIBUTION PHASEQ2

GREEN AND AMPT EQUATIONQ3

RICHARDS’ EQUATIONQ3

Abstract

The rate and duration of downward flow during redistribution process determines the effective soil water storage at any time. This property is vitally important, particularly in arid and semi-arid regions where plants must rely for long periods of time on the remained soil water of the root zone. In this study a new approach for SCALING of soil moisture redistribution process based on the Green-Ampt redistribution theory was developed. Using the scaled results of numerical solution of the general flow (Richards’ equation), an empirical equation for predicting the SOIL MOISTURE PROFILE during redistribution process was derived. An important advantage of the empirical equation is adopting the effect of hysteresis in soil retention curve on redistribution process. To validate the proposed empirical equation, its outputs were compared with those of Richards’ solution for 11 soil textural classes (from sand to clay). The comparison showed negligible amount of error for all of the 11 soil textural classes and for a wide range of initial conditions. However, some deviations from results of Richards’ solution were observed under high initial infiltrated water depth and/or high initial soil water content. Therefore, a model which can estimate the soil moisture content at any depth and time during REDISTRIBUTION PHASE with accuracy of numerical models and simplicity in application of analytical models was obtained.

Cites

PERFORMANCE EVALUATION OF SCALING METHODS OF RICHARDS’ EQUATION IN INFILTRATION MODELING IN A WATERSHED (CASE STUDY: MARGHMALEK WATERSHED)

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APA: Copy

SADEGHI, MORTEZA, GHAHRAMAN, B., & DAVARI, KAMRAN. (2008). SCALING AND PREDICTION OF SOIL MOISTURE PROFILE DURING REDISTRIBUTION PHASE. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), 22(2), 417-431. SID. https://sid.ir/paper/141577/en

Vancouver: Copy

SADEGHI MORTEZA, GHAHRAMAN B., DAVARI KAMRAN. SCALING AND PREDICTION OF SOIL MOISTURE PROFILE DURING REDISTRIBUTION PHASE. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)[Internet]. 2008;22(2):417-431. Available from: https://sid.ir/paper/141577/en

IEEE: Copy

MORTEZA SADEGHI, B. GHAHRAMAN, and KAMRAN DAVARI, “SCALING AND PREDICTION OF SOIL MOISTURE PROFILE DURING REDISTRIBUTION PHASE,” JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), vol. 22, no. 2, pp. 417–431, 2008, [Online]. Available: https://sid.ir/paper/141577/en

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