Search found 15 matches

by nessrine
Fri Nov 22, 2019 2:31 pm
Forum: HYDRUS (2D/3D)
Topic: BC. options in Hydrus 2D/3D version 1.10
Replies: 2
Views: 271

Re: BC. options in Hydrus 2D/3D version 1.10

ok thank you for your response
by nessrine
Wed Nov 20, 2019 1:53 pm
Forum: HYDRUS (2D/3D)
Topic: BC. options in Hydrus 2D/3D version 1.10
Replies: 2
Views: 271

BC. options in Hydrus 2D/3D version 1.10

Dear Jirka I'm working with Hydrus 2D/3D version 1.10 I'm solving water flow problem under surface irrigation (like flood irrigation ) the irrigation is applied two time per week , so during irrigation I have atmosperic BC and variable flux BC at the same time my question : Should I work with variab...
by nessrine
Mon Nov 04, 2019 3:53 pm
Forum: HYDRUS (2D/3D)
Topic: Solute transport and sub-surface irrigation
Replies: 5
Views: 238

Re: Solute transport and sub-surface irrigation

thank you for your response it was very helpful and I solved the problem however now I'm facing a new problem I'm using Hydrus 2D/3D to simulate water flow and solute transport problem under irrigation. the irrigation method used in this work is subsurface drip irrigation and surface submersion irri...
by nessrine
Thu Sep 26, 2019 10:34 am
Forum: HYDRUS (2D/3D)
Topic: Solute transport and sub-surface irrigation
Replies: 5
Views: 238

Re: Solute transport and sub-surface irrigation

thank you for your response , yes in my case I have an atmospheric BC in fact the irrigation monitoring was done based on "farmer field scheduling" and they use alternative irrigation ( once they irrigate with traditional method " flood irrigation" and once they use subsurface drip irrigation). So i...
by nessrine
Wed Sep 25, 2019 3:12 pm
Forum: HYDRUS (2D/3D)
Topic: Solute transport and sub-surface irrigation
Replies: 5
Views: 238

Solute transport and sub-surface irrigation

Hi I'm working with Hydrus 2D/3D , I want to simulate water flow and solute transport under sub-surface irrigation for data palm trees. my question is about the solute concentration I worked with VarFlux1 for irrigation ( since it is subsurface irrigation) and for solute concentration shoud I put it...
by nessrine
Tue Feb 26, 2019 5:33 pm
Forum: HYDRUS (2D/3D)
Topic: Root distribution /root water uptake
Replies: 4
Views: 600

Re: Root distribution /root water uptake

ok thank you for your reply :) :)
by nessrine
Tue Feb 26, 2019 5:06 pm
Forum: HYDRUS (2D/3D)
Topic: Root distribution /root water uptake
Replies: 4
Views: 600

Re: Root distribution /root water uptake

dear Jirka thank you for your reply in fact, I work on data-palm trees; and in the hydrus database for the solute stress model, I can not find it; even I can not find the deciduous fruit. so it is correct to calibrate the water flow with inverse model (with out considering the solute stress model I ...
by nessrine
Tue Feb 26, 2019 4:21 pm
Forum: HYDRUS (2D/3D)
Topic: Root distribution /root water uptake
Replies: 4
Views: 600

Root distribution /root water uptake

dear Jrika I'm working with Hydrus 2D/3D version and I'm little confused about the scale of the root water uptake in the domain properties that means the density of roots or what exactly ? In my case I'm trying to calibrate the water flow under sub-surface drip irrigation with the inverse method and...
by nessrine
Thu Oct 18, 2018 10:03 am
Forum: Hydrus 1D
Topic: evaporation
Replies: 2
Views: 672

Re: evaporation

thank you for your answer, in the second paragraph I said that the model don't reproduce the same fluctuation of solute transport as the observed data under irrigation
by nessrine
Tue Oct 16, 2018 1:12 pm
Forum: Hydrus 1D
Topic: evaporation
Replies: 2
Views: 672

evaporation

dear Jirka I work with hydrus 1D on solute transport (TDS) under irrigation , 1m soil depth , sandy loam soil , my question is about evaporation rate , hydrus considerate evaporation only on top surface or on specific soil depth ? in fact I work on 3 soil depth 5cm 25 cm 90 cm , and I found a fluctu...
by nessrine
Wed Jan 24, 2018 11:37 am
Forum: HYDRUS (2D/3D)
Topic: bubbler irrigation hydrus 2D
Replies: 1
Views: 925

bubbler irrigation hydrus 2D

Dear Jirka, I'm working with Hydrus 2D in order to simulate surface irrigation "bubbler system" , is a Low-head bubbler irrigation systems, apply water to the soil as a small umbrella form , so we have in this case a circle surface wetted zone which depends on irrigation flow rate, but in my case th...
by nessrine
Tue Feb 23, 2016 10:10 pm
Forum: Hydrus 1D
Topic: Van Genuchten parameters
Replies: 5
Views: 4794

Re: Van Genuchten parameters

thank you for your answer , just one thing , did you mean I should work with alpha values predicted by hydrus ?
by nessrine
Tue Feb 23, 2016 1:56 pm
Forum: Hydrus 1D
Topic: Van Genuchten parameters
Replies: 5
Views: 4794

Re: Van Genuchten parameters

thank you for your answer, but when i put my soil pourcentages, soil bulk density and water content at 1500 KPA and water content at 33 KPA , alpha values predicted by rosetta were between 0.45 and 0.46 and when I read in bibliography I found different values (as you already said 7.5 1/m), That is w...
by nessrine
Sun Feb 21, 2016 12:59 pm
Forum: Hydrus 1D
Topic: Van Genuchten parameters
Replies: 5
Views: 4794

Van Genuchten parameters

hello I'm confused with the Van Genuchten parameters, in fact i'm working on sandy loam soil, I calibrated my model and i found not bad results, I worked with m as unit and I set the alpha parameter ranging from 0.45 to 0.05 is that correct ? (I'm asking about alpha values logic or not for sandy loa...
by nessrine
Wed Feb 03, 2016 6:54 pm
Forum: Hydrus 1D
Topic: root water uptake
Replies: 1
Views: 1909

root water uptake

i have a simple question with hydrus 1D , the "actual root water uptake" is the same " the plant transpiration" ?? it take into account the plant need or not ?