Version 2.02, released in September 2012, offers three additional add-on modules: DualPerm 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, C-Ride for simulating two-dimensional colloid-facilitated solute transport, and HP2, which couples Hydrus (its two-dimensional part) with the PHREEQC geochemical code to create this new comprehensive simulation tool (HP2 - acronym for HYDRUS-PHREEQC-2D), corresponding to a similar one-dimensional module HP1. We have also implemented two new solute transport modules ( UNSATCHEM and CWM1) for evaluating the transport of major ions and for simulating processes in natural or constructed wetlands. Another major improvement that should significantly improve the effectiveness of working with HYDRUS, is an option to specify various domain properties, and initial and boundary conditions, on Geometrical Objects, rather than on FE-Mesh. The 3D-Professinal Level will enable you to define transport domains of virtually arbitrary 3D shapes. In HYDRUS version 2.x, we are expanding the four editions ( Levels), which were available in version 1.x of HYDRUS, namely 2D-Lite, 2D-Standard, 3D-Lite, and 3D-Standard, with a new additional 3D-Professional Level.
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