APPLICATION OF THE GREEN-AMPT INFILTRATION EQUATION FOR ALTERNATE FURROW IRRIGATION

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AFSHAR-CHAMANABAD H.; SEPASKHAH ALI REZA

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Journal: JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH Year:2002 | Volume:2 | Issue:9 Page(s): 1-14

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Title

APPLICATION OF THE GREEN-AMPT INFILTRATION EQUATION FOR ALTERNATE FURROW IRRIGATION

Author(s)

AFSHAR-CHAMANABAD H. | SEPASKHAH ALI REZA | Issue Writer Certificate

Keywords

GREEN- AMPTQ4

INFILTRATION EQUATIONQ4

ALTERNATE FURROW IRRIGATIONQ4

Abstract

One of the surface irrigation methods is furrow irrigation which is used in different ways. One of the methods in furrow irrigation is alternate (every-other) furrow irrigation in which the furrows are irrigated alternatively. In this irrigation method water infiltrates more horizontally than vertically. Appropriate INFILTRATION EQUATION should be used in designing a surface irrigation method. Thus, the differences in INFILTRATION EQUATIONs for ordinary and ALTERNATE FURROW IRRIGATIONs should be investigated. Some of the INFILTRATION EQUATIONs are empirical and are obtained from field measurements. Some others are physically based equations and their performances should be tested in field. In this research four different methods were used to solve the Green-Ampt equation for alternate and ordinary furrow irrigations to simulate the advance phase, recession phase and outflow hydrograph. The results of simulation were compared with field data and the best method for solving the Green-Ampt equation was proposed. Among the four methods (slug, modified slug, exponential and dimensionless), for solving the Green-Ampt INFILTRATION EQUATION to simulate the advance, recession and outflow hydrograph in furrow irrigation, the exponential model were preferred for both ordinary and ALTERNATE FURROW IRRIGATION. The furrow spacing in ordinary and ALTERNATE FURROW IRRIGATIONs were different (60 and 120 cm, respectively) and was one of the input data to the model. Finally, appropriate results were obtained by the exponential model for both ordinary and ALTERNATE FURROW IRRIGATIONs with different furrow spacings.

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APA: Copy

AFSHAR-CHAMANABAD, H., & SEPASKHAH, ALI REZA. (2002). APPLICATION OF THE GREEN-AMPT INFILTRATION EQUATION FOR ALTERNATE FURROW IRRIGATION. JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH, 2(9), 1-14. SID. https://sid.ir/paper/28208/en

Vancouver: Copy

AFSHAR-CHAMANABAD H., SEPASKHAH ALI REZA. APPLICATION OF THE GREEN-AMPT INFILTRATION EQUATION FOR ALTERNATE FURROW IRRIGATION. JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH[Internet]. 2002;2(9):1-14. Available from: https://sid.ir/paper/28208/en

IEEE: Copy

H. AFSHAR-CHAMANABAD, and ALI REZA SEPASKHAH, “APPLICATION OF THE GREEN-AMPT INFILTRATION EQUATION FOR ALTERNATE FURROW IRRIGATION,” JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH, vol. 2, no. 9, pp. 1–14, 2002, [Online]. Available: https://sid.ir/paper/28208/en

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