Search found 4 matches

by ebrahimian
Wed Jan 19, 2011 10:13 am
Forum: Hydrus 1D
Topic: water flow only
Replies: 5
Views: 3823

In the table of "time variable boundary condition": My BC for water flow: "variable pressure head/flux" HYDRUS_1D version 4.14 When the volumetric flux of water (FluxTop) leaves the root zone (for example Evaporation) during a certain time step (a Neumann boundary condition), what value must be dete...
by ebrahimian
Thu Dec 30, 2010 6:43 pm
Forum: Hydrus 2D (old version 1996 - 2005)
Topic: Inverse solution
Replies: 3
Views: 10213

<b>Happy New Year!</b> I want to simulate water and nitrate movements in furrow fertigation for maize field. When I am running the model for inverse solution (9 soil hydraulic parameters must be optimized for three soil layers) I got the following message after 3-4 hours. "ORTHOMIN terminates - too ...
by ebrahimian
Fri Dec 17, 2010 9:18 pm
Forum: Hydrus 2D (old version 1996 - 2005)
Topic: Inverse solution
Replies: 3
Views: 10213

Inverse solution

Jirka, I want to optimize 6 soil parameters (3 for soil hydraulic and 3 for soil solute transport). How many parameters can HYDRUS_2D (old version) simultaneously optimize? In your opinion, is it better to optimize parameters in two parts (first part for soil hydraulic parameters and second part for...
by ebrahimian
Thu Dec 16, 2010 3:23 pm
Forum: Hydrus 2D (old version 1996 - 2005)
Topic: Maximum concentration of nitrate in the sink term
Replies: 1
Views: 7643

Maximum concentration of nitrate in the sink term

Dear Jirka I saw your paper (Hanson et al., 2006) that was done for simulating drip fertigation for tomato and grape. That is nice paper especially is the guide for the parameters of nitrate, ammonium and urea fertilizers. I want to know what was the value of maximum concentration of nitrate in the ...