## Search found 8 matches

Fri Nov 03, 2023 6:28 am
Forum: Hydrus 1D (old free version)
Topic: Retardation factor in mobile and immobile water model
Replies: 2
Views: 3020

### Re: Retardation factor in mobile and immobile water model

Dear Jirka,

Have a good day~
Thu Oct 19, 2023 6:25 am
Forum: Hydrus 1D (old free version)
Topic: Retardation factor in mobile and immobile water model
Replies: 2
Views: 3020

### Retardation factor in mobile and immobile water model

Dear Jirka, I have one question not directly regards to HYDRUS 1-D. But I am using HYDRUS 1-D for inversely fitting model using Mobile-Immobile water model to obtain several parameters and aimed to calculate the retardation factor of solute. I crossed several manuscripts and found that we can calcul...
Thu Feb 02, 2023 1:53 am
Forum: Hydrus 1D (old free version)
Topic: Mobile-Immobile model
Replies: 10
Views: 2936

### Re: Mobile-Immobile model

Dear Jirka,

Thank you so much for your quick and helpful response. It does help me a lot.

Have a good day!

Best regards,

Tho Tran
Thu Feb 02, 2023 1:03 am
Forum: Hydrus 1D (old free version)
Topic: Mobile-Immobile model
Replies: 10
Views: 2936

### Re: Mobile-Immobile model

Dear Jirka, Thank you for your reply. It is very helpful. Can I have one more question please? Under such condition, when we consider the Freundlich absorption, there is a term of "Fraction of sorption site in contact with mobile zone" - known as f. I crossed several papers, some assumes that as the...
Wed Feb 01, 2023 7:40 am
Forum: Hydrus 1D (old free version)
Topic: Mobile-Immobile model
Replies: 10
Views: 2936

### Re: Mobile-Immobile model

Dear Jirka, I crossed by this post. and have one question please? "In the system with macropores, the dual-porosity model (which requires two domains – mobile and immobile) likely interprets the entire matrix as being immobile, since the flow is dominated by macropores." You stated this. Could you e...
Fri Dec 16, 2022 1:14 am
Forum: Hydrus 1D (old free version)
Topic: Dual porosity model with two-site sorption
Replies: 3
Views: 1588

### Re: Dual porosity model with two-site sorption

Dear sir, Thank you so much for your quick response. I got it now. I have one more question, please. The Dual-Permeability Model with the two-site sorption model is inactivated in my HYDRUS 1-D version (which I downloaded from PC-progress website). Could you tell me how to activate it or which versi...
Thu Dec 15, 2022 7:10 am
Forum: Hydrus 1D (old free version)
Topic: Dual porosity model with two-site sorption
Replies: 3
Views: 1588

### Dual porosity model with two-site sorption

Dear Sirs, I have two questions regarding to Chemical and Physical Nonequilibrium Models in HYDRUS 1-D. Currently, I only see the Dual-Porosity Model with two-site sorption in the Mobile zone in the HYDRUS 1-D version that I am using. The "Modeling Nonequilibrium Flow and Transport Processes using H...
Mon Oct 24, 2022 8:07 am
Forum: STANMOD
Topic: link between two-region and two-site model
Replies: 0
Views: 8550

### link between two-region and two-site model

Dear all, My study is about the transport of As(V) through the vadose zone. I conducted the tracer test (with Cl-) and found that the two-region physical nonequilibrium model fitted well. Normally people used the equilibrium model for the tracer test and then use fitted v and D for modeling reactive...