soil properties for downscaled models

A discussion forum for old Hydrus-2D & Meshgen. Happy Posting!
Download PDF document with all topics (February 8, 2008, 1.9MB): ... on_H2D.pdf
Post Reply
Posts: 1
Joined: Sun May 01, 2011 6:41 pm
Location: Israel

soil properties for downscaled models

Post by gilad » Mon May 30, 2011 1:19 pm

I am using Hydrus 2D to simulate the water flow in a clay soil.
the original scale is about 10 X 40 meters and to be able to run it and keep the result stable I have to reduce the minimum time step or increase the iterations and by doing so the running time is very long even for a small time limit.
i have already tried to reduce the number of point and recreate the mesh in different ways but non have worked.
my question is: is it possible to downscale the model (for example 10 m = 10 cm) and still use the soil properties in the software?
if not are there formulas to change the properties so it will reflect the real situation?
thank you

Posts: 5268
Joined: Sat Mar 16, 2002 3:47 pm
Location: USA
Location: Riverside, CA

Post by Jirka » Mon May 30, 2011 2:03 pm


I do not think that you can do that, because it is a nonlinear problem.

You should upgrade. Version 1 of HYDRUS (2D/3D) is about 50% faster than the old HYDRUS-2D, and version 2 is likely more than 4 times faster.


Post Reply