Add-on modules can be purchased for an existing HYDRUS license either individually or as part of a cost-effective package - see HYDRUS pricing.
Module Name
|
Dimension
|
Flow, Transport, and Reaction Simulations
|
HP1, HP2
|
1D, 2D
|
The HP1 and HP2 modules are the result of coupling Hydrus (its one- and two-dimensional parts) with the PHREEQC geochemical code [Parkhurst and Appelo, 1999], and corresponds to a similar one-dimensional module HP1 [Jacques and Šimůnek, 2005, 2010; Jacques et al., 2006, 2008]. HP2 has, apart from the dimensionality (2D), the same capabilities as HP1. HP2 contains modules simulating (1) transient water flow, (2) the transport of multiple components, (3) mixed equilibrium/kinetic biogeochemical reactions, and (4) heat transport in two-dimensional variably-saturated porous media (soils). Detailed description of the HP2 Module is given in the HP2 user manual [Šimůnek et al., 2012].
|
UnsatChem
|
1D, 2D, 3D
|
The Major Ion Chemistry Module [UNSATCHEM; Šimůnek and Suarez, 1994] can be used instead of the standard solute transport module. Detailed description of the UNSATCHEM Module is given in the UNSATCHEM user manuals [Šimůnek et al., 2012, 2022]. More detailed description of concepts used in the UNSATCHEM module is provided in the HYDRUS-1D technical manual Šimůnek et al., 2022], which provides all relevant information about the one-dimensional version of this module.
|
Wetland
|
2D
|
The Wetland Module (for two-dimensional problems only) was developed to model biochemical transformation and degradation processes in subsurface flow constructed wetlands. In the wetland module two biokinetic model formulations can be chosen: (1) the biokinetic model as described in CW2D [Langergraber and Šimůnek, 2005, 2006, 2011] and (2) the CWM1 (Constructed Wetland Model #1) biokinetic model Langergraber et al., 2009]. In CW2D aerobic and anoxic transformation and degradation processes for organic matter, nitrogen and phosphorus are described, whereas in CWM1 aerobic, anoxic and anaerobic processes for organic matter, nitrogen and sulphur.
|
C-Ride
|
1D, 2D
|
The C-Ride module simulates one- and two-dimensional variably-saturated water flow, colloid transport, and colloid-facilitated solute transport in porous media. The module accounts for transient variably-saturated water flow, and for both colloid and solute movement due to advection, diffusion, and dispersion, as well as for solute movement facilitated by colloid transport. Detailed description of the C-Ride Module is given in the C-Ride user manuals [Šimůnek et al., 2012, 2022].
|
DualPerm
|
1D, 2D
|
The DualPerm module for simulating two-dimensional variably-saturated water movement and solute transport in dual-permeability porous media, i.e., preferential and nonequilibrium water flow and solute transport [Gerke and van Genuchten, 1993; Šimůnek et al., 2003; Šimůnek and van Genuchten, 2008].
|
Furrow
|
2D
|
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.
|
PFAS
|
1D, 2D, 3D
|
The PFAS module includes options to consider sorption to the air-water interface and the concentration effects on surface tension and viscosity Silva et al., 2020].
|
Particle Tracking
|
1D
|
The Particle Tracking algorithm from Šimůnek [1991] was implemented into HYDRUS Zhou et al., 2021]. The results of this module can be used to calculate soil water travel times and water age for different locations in the soil profile.
|
COSMIC
|
1D
|
The COSMIC module developed by Brunetti et al. [2019] calculates above ground neutron fluxes used the physically-based COsmic-ray Soil Moisture Interaction Code (COSMIC) of Shuttleworth et al. [2013].
|
DPU
|
1D, 2D
|
The Dynamic Plant Uptake (DPU) module developed by Brunetti et al. 2019, 2021, 2022] simulates the translocation and transformation of neutral compounds in the soil-plant domain.
|
Fumigant
|
1D, 2D, 3D
|
The Fumigant module includes options required to simulate the fate and transport of fumigants in soils (e.g., removal of a tarp, temperature-dependent tarp properties, an additional injection of fumigant) Spurlock et al., 2013].
|
Above-mentioned references are given on webpages of particular modules.