Search found 58 matches

by diederik
Tue Mar 17, 2020 5:32 am
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: how to setup correct ph for soultions
Replies: 2
Views: 1037

Re: how to setup correct ph for soultions

From the input files you have send, I noted that you use three valance states of N in your initial solution. The initial calculation shows that they are is no redox equilibrum which is kept during the initial calculation. From the moment the transport simulations start, solution speciation is always...
by diederik
Mon Jan 13, 2020 3:29 pm
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: HP1 with more than 20 solutes
Replies: 3
Views: 888

Re: HP1 with more than 20 solutes

Can you just send your email address to djacques@sckcen.be for the version with more than 20 components
by diederik
Mon Jan 13, 2020 1:32 pm
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: HP1 with more than 20 solutes
Replies: 3
Views: 888

Re: HP1 with more than 20 solutes

Hello, you cannot run more than 20 species with the default HPx program (as embedded in the HYDRUS GUI). We have a dummy version that I distributed on request (if you send me your email address). The issue of Mn I cannot solve now - do you have it also with less than 20 components? I tried Mn in the...
by diederik
Sat Dec 07, 2019 10:26 am
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: HP2 running so slow
Replies: 6
Views: 566

Re: HP2 running so slow

what is database that you use?
by diederik
Sat Dec 07, 2019 7:06 am
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: HP2 running so slow
Replies: 6
Views: 566

Re: HP2 running so slow

Can you send the phreeqc script?

diederik
by diederik
Tue Dec 03, 2019 3:35 pm
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: HP2 running so slow
Replies: 6
Views: 566

Re: HP2 running so slow

Hi, one possibility is that your system / rate equations become stiff. Sometimes this can be solved by using the cvode option in the KINETIC data block. Did you test the rate equations for relevant geochemical conditions in batch mode (phreeqc) or 1D? this might give more insight in the stability of...
by diederik
Mon Nov 04, 2019 7:13 am
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: HP1 pH differences from PHREEQC run
Replies: 1
Views: 369

Re: HP1 pH differences from PHREEQC run

Hi,

I guess you use surface complexation with -no_edl option. In that case, the solution is not neutral, but has a charge that has to be transported. You need to add an additional 'solute' to be transported, namely Charge,

Diederik
by diederik
Sun Jun 02, 2019 7:15 pm
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: Question on the necessety of HP1 for my project and on the download web adress
Replies: 1
Views: 844

Re: Question on the necessety of HP1 for my project and on the download web adress

Dear, if hydrus-1D can handle the water flow for your problem (capillary rise in a porous media), then HP1 can handle the geochemistry (calculating saturation index and mineral precipitation). To include the combined flow, transport and geochemistry, you indeed need to be familiar with the water flo...
by diederik
Thu Jan 03, 2019 3:24 pm
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: Water balance with hydrated minerals
Replies: 2
Views: 1578

Re: Water balance with hydrated minerals

Dear,

you are correct, water consumed by mineralogical reactions are not accounted for in the distributed version of HPx. However, everything is implemented in a beta version, but it needs to be benchmarked. I will inform you when this is done,

Diederik
by diederik
Thu Jan 03, 2019 3:18 pm
Forum: HYDRUS (2D/3D)
Topic: HP2 kinetics
Replies: 2
Views: 587

Re: HP2 kinetics

Hello,

I will need to make a test case by myself to evaluate everything is implemented ok. However, we worked once with kinetics and solute uptake by roots in 2D which was working fine.

I will keep you informed on my benchmark,

Diederik
by diederik
Fri May 25, 2018 10:37 am
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: HP1 with gas diffusion
Replies: 3
Views: 1163

Re: HP1 with gas diffusion

Dear,

the HP1 version in the HYDRUS version you obtain from PC-progress does not contain the most recent version for gas diffusion.

If you send me your email, I can provide you a link to a beta version with the most recent version of HP1

Diederik
by diederik
Thu Mar 08, 2018 1:55 pm
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: Basic statement for transpiration rate
Replies: 1
Views: 1204

Re: Basic statement for transpiration rate

I guess you are working with the official released version of HP as included in the HYDRUS-GUI. the function is probable not present in that version.
If you send me your Email, I can provide a link to a version that includes water_sink

Sorry for the inconvenience

Diederik
djacques@sckcen.be
by diederik
Wed Jan 10, 2018 6:39 am
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: Solute Time Variable Boundary Condition
Replies: 1
Views: 1386

Re: Solute Time Variable Boundary Condition

Hi, Minerals as such can not be transported in HP. The components defined within the PHASES datablock are all treated as immobile phases. However, you can treat the insoluble mineral as an aqueous component and then it will be transported with the advection-dispersion equation. You can add then kine...
by diederik
Wed Dec 28, 2016 7:02 am
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: As(3)&As(5) lacking in HP1
Replies: 2
Views: 3321

Re: As(3)&As(5) lacking in HP1

Note also that the list in the graphical user interface only lists some of the most common component users usually use. If your specific component is not in the list, as is the case of As (or if you define a new component), you can also just type the component in the Component table.

Diederik
by diederik
Thu Apr 28, 2016 3:01 am
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: Maximum number of components
Replies: 1
Views: 3080

Re: Maximum number of components

Dear

this is the limit of the program, it cannot be bypassed,
contact me by mail (djacques@sckcen.be) if you want to use a larger number,

diederik