Root distribution

 Posts: 28
 Joined: Wed Sep 21, 2011 10:46 pm
 Location: Canada
Root distribution
Hi Jirka,
I hope you are well. I have a few questions for you. My first is regarding the scaling factors. What does it mean in Hydrus? Finally, my second, does root distribution represent the capacity of water distribution in the root?
Best regards,
Cranberry1
I hope you are well. I have a few questions for you. My first is regarding the scaling factors. What does it mean in Hydrus? Finally, my second, does root distribution represent the capacity of water distribution in the root?
Best regards,
Cranberry1

 Posts: 28
 Joined: Wed Sep 21, 2011 10:46 pm
 Location: Canada
Hi Mr. Jirka,
Could you please send me a copy of your article Parameter Optimization and Nonlinear Fitting, In: Methods of Soil Analysis, Part 1, Physical Methods, Chapter 1.7, Eds. J. H. Dane and G. C. Topp, Third edition, SSSA, Madison, WI, 139157, 2002. Unfortunately, I wasn't able to find it on PC Progress or elsewhere. Second, in the inverse method, when I input my paramaters in the time field, I place them in daily measurments. Can I produce hourly data in simulated and experimental graphics (delta t)?
Thanks,
Cranberry1
Could you please send me a copy of your article Parameter Optimization and Nonlinear Fitting, In: Methods of Soil Analysis, Part 1, Physical Methods, Chapter 1.7, Eds. J. H. Dane and G. C. Topp, Third edition, SSSA, Madison, WI, 139157, 2002. Unfortunately, I wasn't able to find it on PC Progress or elsewhere. Second, in the inverse method, when I input my paramaters in the time field, I place them in daily measurments. Can I produce hourly data in simulated and experimental graphics (delta t)?
Thanks,
Cranberry1
<b>Paper</b>: YOu can get it at my webpage at http://www.pcprogress.com/en/Default.a ... kasimunek
<b>Time steps</b>: You can use any time step you wish. The restrictions are quite minimal (only to be reasonable with respect to time discretization).
Jirka
<b>Time steps</b>: You can use any time step you wish. The restrictions are quite minimal (only to be reasonable with respect to time discretization).
Jirka

 Posts: 28
 Joined: Wed Sep 21, 2011 10:46 pm
 Location: Canada

 Posts: 28
 Joined: Wed Sep 21, 2011 10:46 pm
 Location: Canada
Hi Jirka,
I am unable to calculate the intial time step, minimum time step and maximum time step. As you suggested, I adopted 0.01d as my initial time step and 1s as my minimum time step but I get an error message that refuses my minimum time step. If my initial time is 0 and my final time is 600 hours, can you help me determine these variables.
Cordially,
Cranberry1
I am unable to calculate the intial time step, minimum time step and maximum time step. As you suggested, I adopted 0.01d as my initial time step and 1s as my minimum time step but I get an error message that refuses my minimum time step. If my initial time is 0 and my final time is 600 hours, can you help me determine these variables.
Cordially,
Cranberry1

 Posts: 28
 Joined: Wed Sep 21, 2011 10:46 pm
 Location: Canada
Hi Mr. Jirka,
Why is it that in the postprocessing I cannot find h(t). Every time I attempt it, I get time versus all pressure head. Can you please demonstrate how I can find h(t) simulated when I input Ep, Pt, Ks, Bc and BI.
Best regards,
Suzanne
N.B. Depth of soil profile = 100 cm
BC = Upper atmospheric bottom = constant pressure head
BI = Z = 0 corresponds to h =  60 cm, z = 70 cm, h = 0 cm, z = 100 cm, h = 30 cm
Why is it that in the postprocessing I cannot find h(t). Every time I attempt it, I get time versus all pressure head. Can you please demonstrate how I can find h(t) simulated when I input Ep, Pt, Ks, Bc and BI.
Best regards,
Suzanne
N.B. Depth of soil profile = 100 cm
BC = Upper atmospheric bottom = constant pressure head
BI = Z = 0 corresponds to h =  60 cm, z = 70 cm, h = 0 cm, z = 100 cm, h = 30 cm