Search found 11 matches

by tomgreen
Sat Mar 16, 2019 3:21 pm
Forum: HYDRUS (2D/3D)
Topic: root growth visualisation
Replies: 3
Views: 509

Re: root growth visualisation

hi thanks, so then i have root zone depth and width over time, rZm i don't need as i already give it in the table of depths, but for shape parameters i would expect to see the depth and radius of maximum intensity and and pz and px parameters, so 2 parameters for each dimension. where can i find the...
by tomgreen
Fri Mar 15, 2019 12:59 pm
Forum: HYDRUS (2D/3D)
Topic: root growth visualisation
Replies: 3
Views: 509

root growth visualisation

hi, i'm trying to simulate water and nitrogen uptake in hydrus 2d, (version 3) and want to how much these are affected by the root zone density distribution. in order to grow the roots over time i chose "using a table" and "vrugt et al 2000" for the shape of the root zone. after entering the root de...
by tomgreen
Sun Sep 02, 2018 1:55 pm
Forum: Hydrus 2D (old version 1996 - 2005)
Topic: Alpha and n for specific soil textures
Replies: 6
Views: 10702

Re: Alpha and n for specific soil textures

"WCS is not porosity but some "saturated water content" (after Hillel) that is 10% to 30% less than porosity because of entrapped and dissolved air."
does anyone know where Hillel said this?
tom
by tomgreen
Wed Aug 29, 2018 3:27 pm
Forum: HYDRUS (2D/3D)
Topic: inverse goes into loop (II)
Replies: 5
Views: 1452

Re: inverse goes into loop (II)

thanks Jirka! i made a list of the 'clean-up' you did so that anyone that has the same issue can be helped by it: time information window: lowered the minimum time step in the from 1.44e-017 to 1.44e-005 output information window: turned on T-level info to 25 in the (it was turned off) set the inter...
by tomgreen
Sun Aug 26, 2018 1:06 pm
Forum: HYDRUS (2D/3D)
Topic: inverse goes into loop (II)
Replies: 5
Views: 1452

Re: inverse goes into loop (II)

if i put zero for the max number of iterations in the inverse solution window it also goes into this funny loop at the end,
but there are results. if the number of iterations is more than zero there are no results.
tom
by tomgreen
Thu Aug 23, 2018 1:49 pm
Forum: HYDRUS (2D/3D)
Topic: inverse goes into loop (II)
Replies: 5
Views: 1452

Re: inverse goes into loop (II)

hi, put beta to 1, but it still goes into that funny loop at the end.
tom
by tomgreen
Wed Aug 22, 2018 10:17 am
Forum: HYDRUS (2D/3D)
Topic: inverse goes into loop (II)
Replies: 5
Views: 1452

inverse goes into loop (II)

hi,
when running the inverse solution to determine solute tranpsort parameters the model goes into a loop of unreadable numbers at the end of the simulation. a year ago i had a very similar problem which was solved- now something else is amiss.
hope you can take a look,
thanks!
tom
by tomgreen
Tue Dec 19, 2017 11:34 am
Forum: HYDRUS (2D/3D)
Topic: running H2D outside of GUI
Replies: 2
Views: 1261

Re: running H2D outside of GUI

it had the hidden extension, (Level_01.dir.txt)
thanks.
by tomgreen
Mon Dec 18, 2017 11:53 am
Forum: HYDRUS (2D/3D)
Topic: running H2D outside of GUI
Replies: 2
Views: 1261

running H2D outside of GUI

hi i'm trying to run H2D outside of the GUI- i made a text file called Level_01.dir which contains the pathway to where the IN files are C:\Users\tom\Dropbox\aquaponics phd\modeling\H2DMODFY\H3D2_1a the working directory is permanent, did "export data for hydrus solver in text format", closed the GU...
by tomgreen
Sun Dec 03, 2017 7:25 pm
Forum: HYDRUS (2D/3D)
Topic: model stuck in loop with inverse solution
Replies: 2
Views: 1213

Re: model stuck in loop with inverse solution

thanks, that did the trick.
:D
by tomgreen
Sun Dec 03, 2017 10:18 am
Forum: HYDRUS (2D/3D)
Topic: model stuck in loop with inverse solution
Replies: 2
Views: 1213

model stuck in loop with inverse solution

hi, i'm trying to determine the Ks, disp L and disp T for a box of perlite by using salinity data from a break-through curve where a 5* 3L pulses of distilled water was preceded and followed by many 3L pulses of saline water. there are 20 points for the inverse solution, which is the salinity of the...