크라이스아이앤씨 쇼핑몰 [HYDRUS]

	Lite		Standard			Professional
	2D	3D	1D	2D	3D	3D
1D Simple Domain	Yes	Yes	Yes	Yes	Yes	Yes
2D Simple Domain, Structured FE-Mesh	Yes	Yes	No	Yes	Yes	Yes
2D General Domain, Unstructured FE-Mesh	No	No	No	Yes	Yes	Yes
3D Simple Domain, Structured FE-Mesh	No	Yes	No	No	Yes	Yes
3D Layered Domain and FE-Mesh	No	No	No	No	Yes	Yes
3D General Domain, Unstructured FE-Mesh	No	No	No	No	No	Yes

l Single-User License is a licence for one user.

n S1H is a license controlled by the Local Hardware Key, which is a USB dongle that must be connected to a computer running HYDRUS.

n S1A is a personal license intended for a single specific user and is controlled by the Software Key, which allows the use of HYDRUS on two computers (e.g. desktop and a laptop – one computer can be used at the same time only). The user name is registered when purchasing the license and cannot be changed afterwards. This license cannot be used remotely (Remote Desktop, etc.) and on virtual machines.

n M1AE, M1AB, N1E and N1B are licenses for one PC, which can be used by different users. These licenses therefore belong to the group of multi-user custom site licenses.

l Multi-user License is a license valid for a given number of computers which are all located at one single physical site of a company or institution.

n Standard Site License is a multi-user license at a discounted price, which corresponds to double the price of a single-user license

n Custom Site License is a multi-user license for all other cases not covered by Standard Site licenses.

The HYDRUS program numerically solves the Richards equation for variably saturated water flow and advection-dispersion equations for both heat and solute transport. The flow equation incorporates a sink term to account for water uptake by plant roots. The heat transport equation considers transport due to conduction and convection with flowing water. The solute transport equations consider advective-dispersive transport in the liquid phase, as well as diffusion in the gaseous phase. The transport equations also include provisions for nonlinear nonequilibrium reactions between the solid and liquid phases, linear equilibrium reactions between the liquid and gaseous phases, zero-order production, and two first-order degradation reactions. In addition, physical nonequilibrium solute transport can be accounted for by assuming a two-region, dual-porosity type formulation which partitions the liquid phase into mobile and immobile regions. Attachment/detachment theory, including filtration theory, is additionally included to enable simulations of the transport of viruses, colloids, and/or bacteria.

HYDRUS may be used to analyze water and solute movement in unsaturated, partially saturated, or fully saturated porous media. The program can handle flow regions delineated by irregular boundaries. The flow region itself may be composed of nonuniform soils having an arbitrary degree of local anisotropy. Flow and transport can occur in a one-dimensional vertical or horizontal direction, a two-dimensional vertical or horizontal plane, a three-dimensional region exhibiting radial symmetry about the vertical axis, or a fully three-dimensional domain. The standard modules (not the specialized add-on modules) of this program also includes a Marquardt-Levenberg type parameter optimization algorithm for inverse estimation of soil hydraulic and/or solute transport and reaction parameters from measured transient or steady-state data. Details of the various processes and features included in HYDRUS are provided in the Technical Manual [Šimůnek et al., 2022].

The main program unit of the HYDRUS Graphical User Interface (GUI) defines the overall computational environment of the system. This main module controls execution of the program and determines which other optional modules are necessary for a particular application. The module contains a project manager and both the pre-processing and post-processing units. The pre-processing unit includes specification of all necessary parameters to successfully run the HYDRUS FORTRAN codes, grid generators for relatively simple rectangular and hexahedral transport domains, a grid generator for unstructured finite element meshes appropriate for relatively complex two-dimensional and three-dimensional domains, a small catalog of soil hydraulic properties, and the Rosetta Lite program for generating soil hydraulic properties from soil textural data. The post-processing unit consists of simple x-y graphics for graphical presentation of soil hydraulic properties, as well as distributions versus time of a particular variable at selected observation points, and actual or cumulative water and solute fluxes across boundaries of a particular type. The post-processing unit also includes options to present results of a particular simulation by means of contour maps, isolines, spectral maps, and velocity vectors, and/or by animation using both contour and spectral maps.

Applies to the latest version HYDRUS 5.x. Please note that older versions of HYDRUS (versions 1.x - 3.x) are no longer maintained and may be incompatible with the latest Windows operating systems.

To use HYDRUS comfortably for calculations of 3D models, we recommend the following system requirements: