Furrow Module

The Furrow module is a hybrid Finite Volume – Finite Element (FV-FE) model that describes the coupled surface-subsurface flow and transport processes occurring during furrow irrigation and fertigation [Brunetti et al., 2018]. The numerical approach combines a one-dimensional description of water flow and solute transport in an open channel with a two-dimensional description of water flow and solute transport in a subsurface soil domain, thus reducing the dimensionality of the problem and the computational cost. The modeling framework includes the standard two-dimensional HYDRUS computational module h2d_calc. exe, which can simulate the movement of water and solutes, as well as root water and nutrient uptake in variably-saturated soils, and a newly developed a one-dimensional model that describes water flow and solute transport in an open channel. The robustness of the proposed model was examined and confirmed by mesh and time step sensitivity analyses ([Brunetti et al., 2018]. The model was theoretically validated by comparison with simulations conducted with the well-established model WinSRFR and experimentally validated by comparison with field-measured data from a furrow fertigation experiment conducted in the US [Brunetti et al., 2018].

The additional input parameters required by the Furrow module are specified in the "Furrow Parameters" dialog window.

Brunetti, G., J. Šimůnek, and E. Bautista, A hybrid finite volume-finite element model for the numerical analysis of furrow irrigation and fertigation, Computers and Electronics in Agriculture, 150, 312-327, doi: 10.1016/j.compag.2018.05.013, 2018.

Brunetti, G., J. Šimůnek, and M. Šejna, The Furrow Module for HYDRUS (2D/3D) Simulating Water Flow and Solute Transport in a Pseudo-Three-Dimensional Furrow Irrigation System, Version 1.0, PC Progress, Prague, Czech Republic, 43 pp., 2019.