Search found 8 matches

by ahughes7
Sun Jul 28, 2019 9:06 pm
Forum: Hydrus 1D
Topic: Splitting actual ET into E & T
Replies: 3
Views: 871

Re: Splitting actual ET into E & T

Hello, I have the same question. I have measured actual ET from an eddy-covariance system and would like to know how to split this into Ep and Tp. I do not know the Kc or the LAI. Even if I was able to find LAI values in the literature, how do I obtain ETp for input into HYDRUS? Cheers and thanks in...
by ahughes7
Wed Mar 20, 2019 11:06 pm
Forum: Hydrus 1D
Topic: Cumulative boundary flux for objective function
Replies: 2
Views: 341

Cumulative boundary flux for objective function

Hello, I have measured outflow from the base of a soil column and would like to use this as a cumulative boundary flux in my objective function. The soil column is 250 cm long and is discretized into 150 nodes (i.e. node #150 is located at 250 cm). The column has an atmospheric surface boundary cond...
by ahughes7
Fri Jan 25, 2019 11:05 pm
Forum: Hydrus 1D
Topic: Dual porosity output file
Replies: 8
Views: 1399

Re: Dual porosity output file

Hello, I was able to fix the issue by increasing the percentage of mobile domain (i.e. by lowering theta_immobile and increasing theta_mobile, keeping theta_total the same). The original project is attached if you are still interested.
Cheers,
Alex
by ahughes7
Tue Jan 22, 2019 8:31 pm
Forum: Hydrus 1D
Topic: Dual porosity output file
Replies: 8
Views: 1399

Re: Dual porosity output file

Hello again, With regards to my previous question, can you explain why the model outputs water contents in the immobile region that are higher than the specified theta_s values? For example, in the dual-porosity model (head mass transfer) I have specified theta_s for the mobile fraction (0.11) and t...
by ahughes7
Thu Dec 20, 2018 12:08 am
Forum: Hydrus 1D
Topic: Dual porosity output file
Replies: 8
Views: 1399

Re: Dual porosity output file

Right, that's what I meant. Thank you!
by ahughes7
Wed Dec 19, 2018 11:22 pm
Forum: Hydrus 1D
Topic: Dual porosity output file
Replies: 8
Views: 1399

Re: Dual porosity output file

Thanks for the speedy response! Does that mean that when doing the inverse solution, if I input pressure heads as data, the model assumes these are from the immobile zone?

Thanks

Alex
by ahughes7
Wed Dec 19, 2018 10:09 pm
Forum: Hydrus 1D
Topic: Dual porosity output file
Replies: 8
Views: 1399

Dual porosity output file

Hello, I am attempting to model some soil tension data using the dual porosity (head mass transfer). The output file Nod_Inf shows me the water contents for both mobile and immobile fractions with depth and only heads for the mobile portion (i.e. macropores). I am comparing this output to measured h...