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HYDRUS is distributed in multiple different versions (Editions / Levels) so that users may acquire only that segment of the software that is most appropriate for their application.
![hydrus软件正版](//l.b2b168.com/2021/04/29/16/202104291637327777094.jpg)
For solute transport, the code supports both (constant and varying) prescribed concentration (Dirichlet or first-type) and concentration flux (Cauchy or third-type) boundaries. The dispersion tensor includes a term reflecting the effects of molecular diffusion and tortuosity.
The unsaturated soil hydraulic properties are described using Genuchten [1980], Brooks and Corey [1964], Durner [1994], Kosugi [1995], and modified Genuchten type analytical functions. Modifications were made to improve the description of hydraulic properties near saturation.
![hydrus软件正版](//l.b2b168.com/2021/04/29/16/202104291640360537894.jpg)
To minimize numerical oscillations upstream weighing is included as an option for solving the transport equation.
In addition, HYDRUS implements a Marquardt-Levenberg type parameter estimation technique for the inverse estimation of selected soil hydraulic and/or solute transport and reaction parameters from measured transient or steady-state flow and/or transport data (only for the standard modules).
![hydrus软件正版](//l.b2b168.com/2021/04/29/16/202104291637329253784.jpg)
An error in the HP2-Components dialog (values in the “component” column were disabled)
A minor error in the dialog for Chart Options - some check-boxes were not displayed
correctly under certain circumstances
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