Search found 23 matches

by Lekan
Thu Dec 05, 2013 5:30 pm
Forum: Soil Physics with Hydrus
Topic: Hydrulic Parametrs of Peat
Replies: 3
Views: 7600

Re: Hydrulic Parametrs of Peat

Thanks, Jirka. I found these references very useful as well for some reclamation studies in Alberta Oil Sands.

Lekan.
by Lekan
Fri May 14, 2010 7:06 am
Forum: Hydrus 1D
Topic: Surprising results or not
Replies: 11
Views: 6120

Hi, Dr Simunek. Thanks for the advise. The riddle is becoming clearer now. I realize that episodic bottom flux is more important than the cumulative outflow - the former occurs at certain periods which may not coincide with solute movement while the latter is just the total flux over the period. Tha...
by Lekan
Wed May 12, 2010 11:35 pm
Forum: Hydrus 1D
Topic: Surprising results or not
Replies: 11
Views: 6120

Thanks for the insight.
I'll follow up on this discussion.

Lekan.
by Lekan
Wed May 12, 2010 8:19 pm
Forum: Hydrus 1D
Topic: Surprising results or not
Replies: 11
Views: 6120

The steps taken in my computation were similar to those examples, particularly Test 2, except that I had one-time solute application. My solute mass balance was perfect, and zero CncBalR [%] in some cases. But I need this mass of solute to decline with time in order to simulate the leaching in the f...
by Lekan
Wed May 12, 2010 7:42 pm
Forum: Hydrus 1D
Topic: Surprising results or not
Replies: 11
Views: 6120

Thanks.
I'll look at it.
by Lekan
Wed May 12, 2010 7:25 pm
Forum: Hydrus 1D
Topic: Surprising results or not
Replies: 11
Views: 6120

Hi Dr. Simunek, The discrepancies between 1D and 2D in my study is a big concern for me. As I mentioned earlier, the 2D results simulated the field data on solute leaching reasonably well while 1D showed that the mass of solue remained in the soil profile for 382 days (with temporal variation in pre...
by Lekan
Tue May 11, 2010 4:13 am
Forum: Hydrus 1D
Topic: Surprising results or not
Replies: 11
Views: 6120

Thanks, Dr. Simunek. Yes, vertical flow dominates in the 2D, and the simulation seemed reasonable. However, I'm still stucked with 1D which was supposed to be easier - the total ConcVol [M/L2] in the profile remained unchanged, but there were temporal variations in solute (bromide) distributions wit...
by Lekan
Mon May 10, 2010 4:25 pm
Forum: Hydrus 1D
Topic: Surprising results or not
Replies: 11
Views: 6120

Thanks so much for the advise. Yes, the Concentration (solute) flux BC produced concentrations larger than the field data. The large conc would had been alright, except that the total mass of solute in the profile remained the same for over 382 days with precipitation!!! That sort of bothers me beca...
by Lekan
Mon May 10, 2010 4:29 am
Forum: Hydrus 1D
Topic: Surprising results or not
Replies: 11
Views: 6120

Surprising results or not

Hi, I needed to simulate solute leaching from a soil profile in HYDRUS-1D. The solute application was prescribed as Flux BC with the infiltrating water (precipitation), but the results showed that the solute mass balance remained the same over the period of simulation (382 days); i.e. no leaching lo...
by Lekan
Fri Feb 26, 2010 4:11 am
Forum: HYDRUS (2D/3D)
Topic: 2D outputs
Replies: 3
Views: 2315

Thanks for the response. I was able to output the dimensions as you advised. However, I would like to show the labels for x-z axis on the domain and the contour graph, i.e., labels for the x-axis showing the scales for the horizontal distance, and for the z-axis (vertical-direction) showing the valu...
by Lekan
Wed Feb 24, 2010 7:32 pm
Forum: HYDRUS (2D/3D)
Topic: 2D outputs
Replies: 3
Views: 2315

2D outputs

Please can you advise on how to output the 2D contours showing the scales for x- and z-dimensions in the graph.
Printing the contours in the default mode does not show the distribution with depth and horizontal distance.

Thanks.

Lekan.
by Lekan
Tue Jan 19, 2010 9:26 pm
Forum: Hydrus 1D
Topic: Solute leaching
Replies: 1
Views: 1697

Solute leaching

Hello Jirka, Thanks for the suggestions provided on the solute mass balance. I was able to get a realistic mass balance with the Cauchy BC. However, as mentioned earlier, the total mass of solute in the proifle (120 cm depth) remained unchanged over 382 days of simulation. Obviously, this is not rea...
by Lekan
Thu Jan 14, 2010 12:14 am
Forum: Hydrus 1D
Topic: top and bottom BC
Replies: 7
Views: 2572

Dear Anilkumar,
I guess the negative days denote days with net infiltration (-ve vTop).
Check the T Level information for clarification.

Lekan.
by Lekan
Tue Jan 12, 2010 1:59 pm
Forum: Hydrus 1D
Topic: Solute mas balance
Replies: 5
Views: 2188

Yes, I have looked at 'units in Hydrus' but didn't solve these specific issues.
Thanks for your efforts, anyway. I appreciate the suggestions.
by Lekan
Tue Jan 12, 2010 2:01 am
Forum: Hydrus 1D
Topic: Solute mas balance
Replies: 5
Views: 2188

Thanks, Jirka. I have actually considered the Cauchy BC approach. However, specifying the solute input with the surface flux was a liitle bit ambiguous. I would like to clarify the following steps for prescribing the concentration at the cTop: -The actual concentration in solid phase was 2 mg/cm2 -S...