Search found 98 matches

by Srilert
Thu Jul 14, 2011 1:55 pm
Forum: Hydrus 1D
Topic: sorbed concentration on soil
Replies: 2
Views: 3372

Dear all, I would like to clearify further the previous question: I have run the water and pesticide transport through unsaturated soil with hydraulic properties and solute transport parameters(sorption isotherm and degradation), but the output has showed only pesticide concentration in water. Howev...
by Srilert
Thu Jul 14, 2011 10:37 am
Forum: Hydrus 1D
Topic: sorbed concentration on soil
Replies: 2
Views: 3372

sorbed concentration on soil

Dear Sir,

After running the solute transport (with sorption isotherm), I don't see the sorbed concentration in soil. Actually, we should get the sorbed concentrations on soils, but I cannot get it.

Please let me know

Srilert
by Srilert
Fri Jul 08, 2011 11:18 am
Forum: Hydrus 1D
Topic: How do we import the concentration ?
Replies: 1
Views: 1166

How do we import the concentration ?

Dear all, I have used HYDRUS-1D for contaminant transport for 1 month and then I would like to import the previous results, such as concentration output, as the initial concentration for the next run in HYDRUS-1D. How can I do for this ? Please let me know Thank you very much in advances Srilert
by Srilert
Mon Mar 22, 2010 8:52 am
Forum: Hydrus 1D
Topic: Soil vapor extraction (SVE)
Replies: 1
Views: 1447

Soil vapor extraction (SVE)

Dear all,

I would ask about application of HYDRUS-1D. Can it use for assessing soil vapor extraction of TCE in soil ? Please advise about reference or examples.

Thank you very much in advance

Srilert
by Srilert
Wed Dec 30, 2009 2:10 am
Forum: Hydrus 1D
Topic: Scaling factor
Replies: 3
Views: 1887

Dear Jirka

Can I use HYDRUS 2D instead ? How should I do ?

Best regards,

Srilert
by Srilert
Tue Dec 29, 2009 8:45 am
Forum: HYDRUS (2D/3D)
Topic: Scaling factor
Replies: 0
Views: 1423

Scaling factor

Dear Sir,

I would like to ask you all that if I would like to apply "scaling factor" in HYDRUS 1D to simulate the pesticide through variable hydraulic conductivity of the unsaturated agricultural soils.

How should I start ?

Please suggest me

Srilert
by Srilert
Tue Dec 29, 2009 7:28 am
Forum: Hydrus 1D
Topic: Scaling factor
Replies: 3
Views: 1887

Scaling factor

Dear Sir,

I would like to ask you all that if I would like to apply "scaling factor" in HYDRUS 1D to simulate the pesticide through variable hydraulic conductivity of the unsaturated agricultural soils.

How should I start ?

Please suggest me

Srilert
by Srilert
Wed Nov 25, 2009 10:57 am
Forum: Hydrus 2D (old version 1996 - 2005)
Topic: run in case of very small time step
Replies: 0
Views: 5258

run in case of very small time step

Dear all, I have the problem when i run HYDRUS 2D in case of very small time step in my project. Let me describe my project. I injected contaminant into 2layers of subsurface system with minimum time step 1e-5, when it is coming around 0.2 mins, it go out the program. That mean I cannot get any resu...
by Srilert
Fri Oct 30, 2009 8:12 am
Forum: Hydrus 2D (old version 1996 - 2005)
Topic: reduce running time
Replies: 1
Views: 11961

reduce running time

Dear all,

I now run some scenarios but they take very long time (3-5 hrs). How should I do to reduce these running time?

Please advise me

Srilert
by Srilert
Wed Oct 07, 2009 6:02 am
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: How could I apply HP 1 for my work ?
Replies: 1
Views: 5526

How could I apply HP 1 for my work ?

Dear all, In my study, I conducted column experiments of lateritic soil from mining area (uncontaminated soil). Then, I injected heavy metals into saturated columns under pH 4 and 5. Before I injected heavy metals, I controlled constant pH with NaAc buffer. After I got the results, I described the s...
by Srilert
Thu Sep 10, 2009 2:00 am
Forum: Hydrus 1D
Topic: HP1 with two-site model
Replies: 1
Views: 1230

HP1 with two-site model

Dear all, Can I use HP1 with option of "two-site model" ? Due to chemical non-equilibrium condition (two-site model) occur in my experimental results (heavy metal transport under different pHs) , I derived this from general transport. However, I got the comments from reviewer to use HP1 for my syste...
by Srilert
Tue Aug 11, 2009 7:24 am
Forum: Hydrus 2D (old version 1996 - 2005)
Topic: Nodal recharge
Replies: 1
Views: 6972

Nodal recharge

Dear all,

Could I use nodal recharge as recharge well? What is about unit of rechage well; can I use it's unit as pressure, for example lb/ft^2 ?


Anyone please suggests me.

Regards,

Srilert
by Srilert
Tue Aug 11, 2009 6:55 am
Forum: Hydrus 2D (old version 1996 - 2005)
Topic: Filtration theory
Replies: 1
Views: 5735

Filtration theory

Dear all,

I am not sure Is there the flitration theory in HYDRUS 2D? If not, how can I add this in HYDRUS-2D.

Please help me

Srilert
by Srilert
Tue Aug 11, 2009 2:38 am
Forum: Hydrus 2D (old version 1996 - 2005)
Topic: hydraulic conductivity
Replies: 1
Views: 5887

hydraulic conductivity

Dear all, Can I use other fluid in HYDRUS-2D by changing hydrualic conductivity as follow? K=[(permeability)*(fluid density)*g]/ fluid viscosity 1. As i know hydraulic conductivity from falling head method => I will know permeability (using above equation) 2. Then, I use above equation by using perm...
by Srilert
Wed May 13, 2009 11:36 am
Forum: Hydrus 2D (old version 1996 - 2005)
Topic: Variable flux
Replies: 0
Views: 4671

Variable flux

DEar all, I have a problem in boundary condition. when I applied variable flux of leachate at top boundary condition (some seepage flux from clay liner beneath landfill) through vadose zone through the water table (set as constant pressure). I would like to know where I can input the values of varia...