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适用平台windows
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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
The Particle Tracking module (in 1D), tracking the position of hypothetical particles, which
are either initially defined in the soil profile, or are released at its boundaries. The results of
this module can be used to calculate soil water travel times and water age for different
locations in the soil profile.
Column infiltration test
Water flow and solute Transport in a field soil profile under grass - seasonal simulation
Two-dimension unidirectional solute transport - comparison with analytical solution
One-dimensional solute transport with nitrification chain - comparison with analytical solution
One-dimensional solute transport with nonlinear cation adsorption - Data from Selim et al. (1987)
One-dimensional solute transport with non-equilibrium cation adsorption
Axisymetrical three-dimensional water and solute infiltration test
One-dimensional water flow with multiple hysteretic loops, data from Lenhard et al. (1991)
Water flow and solute transport from furrow to a drain
Three wetland examples
标准计算模型
HYDRUS是模拟变量饱和多孔介质下的水、热和多溶质二维和三维运动的有限元计算模型。HYDRUS数值求解饱和非饱和水流的Richards方程和热传递和溶质运移的对流扩散型方程。
水流方程包含一个下沉期,可导致植物根系吸水。热传递方程考虑了水流传导和对流运动。对流扩散的溶质运移方程的管理是一个非常普遍的形式,包括固体和液态非线性非平衡反应的规定以及液体和气体的线性平衡反应。因此,不管是吸附溶质还是挥发溶质(如)都已经考虑到了。溶质运移方程还包括了零阶生产的影响、其他溶质的立一级降解以及一阶衰减和生产反应,以便提供连续一级链中溶质间所需的耦合。运移模拟也会引起液相对流和扩散、气相扩散,因此次模型在液态和气态条件下可同时模拟溶质运移。目前HYDRUS多可考虑15种溶质,在单向链中耦合或溶质间立运移。物理非平衡溶质运移由双区和双重孔隙公式引起, 并把液相分成移动和不可移动区域。附着和分离理论,包括过滤理论,病毒、胶质和运移的模拟也包含在其中。
HYDRUS可用来分析水质和溶质在非饱和、部分饱和或是饱和多孔介质情况下的运动。HYDRUS可由不规则边界处理水流区域,水流区域本身可能是由非均匀土壤组成具有局部各向任意程度。水流和运移可能发生在垂直面,也可能在水平面,具有径向对称性的垂直轴或三维区域。
模型的水流部分可以用来处理连续或时变的规定的方向和流量边界,以及由气象条件控制的边界。土壤表面边界条件在模拟从给定的流量到规定的方向类型条件期间可能会发生变化,反之亦然。它还可以通过水域饱和部分的剩余水量和不排水边界条件处理自由面边界。节点排水是由一个简单的模拟实验关系为代表。
对溶质运移来说,软件既支持连续和变化的规定浓度(Dirichlet或first-type)也支持浓度通量边界(Cauchy或third-type)。弥散张量包含分子扩散和曲折的结果反应影响。
Welcome to the website for the HYDRUS software package. Version 1.0 was a successor of the widely used and successful Hydrus-2D / Meshgen-2D software package, originally developed and released by the U.S. Salinity Laboratory in cooperation with the International Groundwater Modeling Center (IGWMC), the University of California Riverside, and PC-Progress, Inc. This version had a completely new graphical environment for both two- and three-dimensional applications, and provided users with much more comfort than the original Hydrus-2D software package. The software was released under the name HYDRUS (2D/3D), with different versions (called Levels) covering both the two- and three-dimensional applications.
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