Investigating the Changes of Coefficients of Infiltration Equations and Their Functional Evaluation under Various Soil Moisture and Bulk Densities

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Barideh r.; NASIMI F.

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Journal Paper

Paper Information

Journal: Iranian Journal of Irrigation and Drainage Year:2021 | Volume:15 | Issue:3 Page(s): 521-530

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Information Journal Paper

Title

Investigating the Changes of Coefficients of Infiltration Equations and Their Functional Evaluation under Various Soil Moisture and Bulk Densities

Author(s)

Barideh r. | NASIMI F. | Issue Writer Certificate

Keywords

Cumulative infiltration

HYDRUS-1D

Infiltration equations

Simulation

Abstract

Infiltration is a key process which can be considered for scheduling, design, management and optimization of irrigation systems. Therefore, it is necessary to choose an appropriate infiltration model to optimize water consumption in agriculture and to study the water cycle on a small and large scale. The purpose of this study was to investigate the sensitivity of the coefficients of Kostiakov, Kostiakov-Lewis and Horton Infiltration equations to the simultaneous changes of initial moisture and soil bulk density and its effect on the performance of Infiltration equations in different soils. For this purpose, Cumulative infiltration data in eight soil textures, three bulk densities including 1. 3, 1. 4 and 1. 5 g / cm3 and five volumetric moisture levels including 0. 1, 0. 15, 0. 2, 0. 25 and 0. 3 was prepared using HYDRUS-1D. In order to represent the effect of the sensitivity of the coefficients of Infiltration equations on the efficiency of those equations at different moisture and bulk densities, first the coefficients of the equations are calculated for all infiltration data (fitting step) and then at a specific moisture and bulk density for each soil, the coefficients are calculated and for other moistures and densities were used (evaluation step). Based on the results, sensitivity of the coefficients of Infiltration equations with changes of moisture and bulk density from high to low was obtained the coefficient of the Kostiakov equation (ak), the coefficient of the Kostiakov-Lewis equation (akl), the power of the Kostiakov equation (bk), the coefficient of the Horton equation (bh) And the power of the Kostiakov-Lewis equation (bkl), respectively. The mean increase of RMSE of the Kostiakov, Kostiakov-Lewis and Horton equations in the evaluation stage was respectively 3. 25, 34 and 2. 8 times the fitting stage. Therefore, the lowest and the highest sensitivity occurred in the Horton and the Kostiakov-Lewis equations respectively.

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APA: Copy

Barideh, r., & NASIMI, F.. (2021). Investigating the Changes of Coefficients of Infiltration Equations and Their Functional Evaluation under Various Soil Moisture and Bulk Densities. IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, 15(3 ), 521-530. SID. https://sid.ir/paper/1053918/en

Vancouver: Copy

Barideh r., NASIMI F.. Investigating the Changes of Coefficients of Infiltration Equations and Their Functional Evaluation under Various Soil Moisture and Bulk Densities. IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE[Internet]. 2021;15(3 ):521-530. Available from: https://sid.ir/paper/1053918/en

IEEE: Copy

r. Barideh, and F. NASIMI, “Investigating the Changes of Coefficients of Infiltration Equations and Their Functional Evaluation under Various Soil Moisture and Bulk Densities,” IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, vol. 15, no. 3 , pp. 521–530, 2021, [Online]. Available: https://sid.ir/paper/1053918/en

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