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Simulation of SDI Soil Water Profiles for Alfalfa Using HYDRUS-2D

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2022 ASABE Annual International Meeting  2200148.(doi:10.13031/aim.202200148)
Authors:   Rocio G. Reyes Esteves, Freddie R. Lamm
Keywords:   HYDRUS-2D, subsurface drip irrigation, soil water content, modeling, simulation.

Abstract. Subsurface drip irrigation (SDI) is an efficient irrigation system for alfalfa production. Realizing the full potential of SDI technology requires optimizing the design and management parameters. A better understanding of the soil water redistribution progression around a buried point source can increase alfalfa water productivity and consequently the success of the SDI system. Numerical simulations are a fast and inexpensive approach to studying optimal design and management practices. In this study, the HYDRUS-2D simulation model was used to compare simulated and measured soil profile volumetric water content data for alfalfa on a deep silt loam soil to a depth of 3 m. The results reinforce the use of HYDRUS-2D as a tool for investigating and designing SDI management practices for alfalfa, a crop known for its high-water use and profitability.

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