Search found 13 matches

by igor.andin@gmail.com
Mon Jan 16, 2023 11:10 am
Forum: Hydrus 1D (old free version)
Topic: Evaporation from Fracture region
Replies: 3
Views: 2898

Re: Evaporation from Fracture region

Thanks for your reply. Just 1 thing to figure out. I am talking now only in the water flow context now. Is it true that parameter SF (surface flux in the fracture) is turned off when the matrix is saturated and generates excess water? I have a feeling that excess water overwrites the parameter vTop....
by igor.andin@gmail.com
Tue Jan 03, 2023 8:28 am
Forum: Hydrus 1D (old free version)
Topic: Missing simulation
Replies: 5
Views: 3264

Re: Missing simulation

Thanks, Jirka,

Of course, I have tried, but there is convergence problems while changing it. I have tried to decrease the time step, but it didn't work. Since it is a dual-permeability model I don't want to mess up anything.

Best,
Andin
by igor.andin@gmail.com
Mon Jan 02, 2023 6:39 pm
Forum: Hydrus 1D (old free version)
Topic: Missing simulation
Replies: 5
Views: 3264

Re: Missing simulation

Sorry for the misspelling. Test 1a1 (Dual-Permeability Model, Infiltration into matrix, a=1 cm).
by igor.andin@gmail.com
Mon Jan 02, 2023 9:25 am
Forum: Hydrus 1D (old free version)
Topic: Missing simulation
Replies: 5
Views: 3264

Missing simulation

Dear Jirka,

There is 1 simulation missing in zip folder, namely Test1a in the Dual-Permeability project.

https://www.pc-progress.com/Downloads/P ... acture.zip.

Just for your information. Can you upload it, if you still have it?

Regards,
Andin
by igor.andin@gmail.com
Wed Dec 07, 2022 1:07 pm
Forum: Hydrus 1D (old free version)
Topic: Evaporation from Fracture region
Replies: 3
Views: 2898

Evaporation from Fracture region

Dear Jirka, Would you mind clarifying 1 thing, since I didn't find specific information concerning this question on the forum or manul.? How evaporation is implemented in the Dual-Permeability model? I see that calculations can be done either with Penman-Monteith Combination Equation or with Hargrea...
by igor.andin@gmail.com
Fri Aug 26, 2022 9:12 am
Forum: Hydrus 1D (old free version)
Topic: Some discrepancy in Hydrus1D?
Replies: 1
Views: 1909

Some discrepancy in Hydrus1D?

Dear prof. Šimunek and forum members, I am simulating non-reactive solute mass transfer using dual permeability model with time-variable boundary conditions. The solute (0.0002 g) and rain (10 cm/day) inputs are on the 6th day of the simulation. 1. In Hydrus 1D under the solute parameters settings, ...
by igor.andin@gmail.com
Tue Jun 07, 2022 6:51 am
Forum: Hydrus 1D (old free version)
Topic: Solute transport with dual-permeavility.Initial conditions
Replies: 9
Views: 5269

Re: Solute transport with dual-permeavility.Initial conditions

I have opened one of your projects, and realized that you have chosen the most complex model that is available (while also ignoring every advice that we give on what parameters to choose to get stable numerical solution). You select the dual-permeability model with immobile water content in the mat...
by igor.andin@gmail.com
Mon Jun 06, 2022 11:36 am
Forum: Hydrus 1D (old free version)
Topic: Solute transport with dual-permeavility.Initial conditions
Replies: 9
Views: 5269

Re: Solute transport with dual-permeavility.Initial conditions

Thanks, that is clear to me now. In my opinion, the soil surface is very crucial and has a great impact on what is happening in the soil, meaning that surface flow into the fracture/matrix can control the preferential flow. Since the idea is to specify the solute in the matrix, I try to simulate now...
by igor.andin@gmail.com
Sun May 29, 2022 11:17 am
Forum: Hydrus 1D (old free version)
Topic: Solute transport with dual-permeavility.Initial conditions
Replies: 9
Views: 5269

Re: Solute transport with dual-permeavility.Initial conditions

Hi, When I wrote this comment, I was able to obtain the ConstF and ConstM columns when I changed the initial conditions as I mentioned above. I suppose it was a lag in Hydrus to render the proper Surface profile summary. But now it seems working fine. Now initially I have specified 2 mg of solute in...
by igor.andin@gmail.com
Fri May 27, 2022 11:37 am
Forum: Hydrus 1D (old free version)
Topic: Solute transport with dual-permeavility.Initial conditions
Replies: 9
Views: 5269

Re: Solute transport with dual-permeavility.Initial conditions

Thanks for a such quick reply. I got these 2 columns for the Fracture and Matrix after I set a fraction of the surface flux to 1, meaning that the surface flux will flow into the fracture first, then into the matrix. However, my simulation considers initially surface flow into the matrix. Is there a...
by igor.andin@gmail.com
Thu May 26, 2022 9:35 pm
Forum: Hydrus 1D (old free version)
Topic: Solute transport with dual-permeavility.Initial conditions
Replies: 9
Views: 5269

Solute transport with dual-permeavility.Initial conditions

Dear all, I am using the dual-permeability (physical non-equilibrium) model to simulate solute dissipation. My solute is assumed to be non-reactive. A solute is initially presented in the top 2 cm of soil (soil column 230 cm). I already know how to specify the fracture of surface flux either to the ...
by igor.andin@gmail.com
Thu May 26, 2022 9:33 pm
Forum: Soil Physics with Hydrus
Topic: Dual Permeability.Initial conditions. Concentration
Replies: 1
Views: 35683

Dual Permeability.Initial conditions. Concentration

Dear all, I am using the dual-permeability (physical non-equilibrium) model to simulate solute dissipation. My solute is assumed to be non-reactive. A solute is initially presented in the top 2 cm of soil (soil column 230 cm). I already know how to specify the fracture of surface flux either to the ...