Welcome to WEAP's Website
WEAP
WEAP is an initiative of the Stockholm Environment Institute.


About WEAP

Home
Why WEAP?
Features
What's New?
Sample Screens
Demonstration
Applications
Publications
History and Credits

Using WEAP
Download
Licensing
User Guide
Tutorial
Videos
Resources

User Forum
Discussions
Members List
Edit Profile

Additional Support
Training
University Courses
Collaboration

About Us
SEI-US Water Resources Program
Please Contact Us


Environmental News
LEAP
Interested in Energy?
Read about LEAP: SEI's software for energy planning.

User Forum

All Topics | Topic "Correct dimensions for monthly "Depp conductivity" "Root zone conductivity""
Log in to post new messages or reply to existing messages.
 
Author Message
Patricia Sullcata

Subject: Correct dimensions for monthly "Depp conductivity" "Root zone conductivity"   
Posted: 6/23/2016 Viewed: 4010 times
Hello! A pretty basic (very basic question) please:

How should I input conductivity values on a monthly basis calculation? (soil moisture method)

Example. Sand conductivity = 5550 m/year
...for monthly analysis, should I introduce 462500 mm/month?

Would appreciate your guidance.
Thanks in advance!
Stephanie Galaitsi

Subject: Re: Correct dimensions for monthly "Depp conductivity" "Root zone conductivity"   
Posted: 6/27/2016 Viewed: 3969 times
Dear Patricia,

Conductivity is a complicated thing, but first a start at approximating it, number you have looks good (annual/12), although it's very high. But sand is very conductive. You can edit it as you're calibrating the model and see how that changes everything.
Patricia Sullcata

Subject: Re: Correct dimensions for monthly "Depp conductivity" "Root zone conductivity"   
Posted: 6/27/2016 Viewed: 3963 times
Dear Stephanie,

Thank you very much for the reply. Then I understand that conductivity may not mean what it looks like. It appears to be a parameter to calibrate rather than a parameter that can be estimated through physical information. Am I right?

Thanks again!
Stephanie Galaitsi

Subject: Re: Correct dimensions for monthly "Depp conductivity" "Root zone conductivity"   
Posted: 6/28/2016 Viewed: 3956 times
Dear Patricia,

Not knowing your data source for the conductivity, it is difficult to say. Lab results for sand conductivity measurements may be very different from results in the field, owing to impurities in the sand, regional aquitards, all sorts of possible reasons. Plus WEAP has two conductivities listed - root zone and deep, and one may have sand but not the other, but it may not be clear where the division is.

I would say start with the data you have - knowing that it is quite a high number - and then include conductivity in your calibration as you try to improve your model fit.
Patricia Sullcata

Subject: Re: Correct dimensions for monthly "Depp conductivity" "Root zone conductivity"   
Posted: 7/3/2016 Viewed: 3916 times
Thank you very much one more time Stephanie and thanks to all the guys who answered through mail. *I love this forum!

I will follow your advice.

Regards to all!
Topic "Correct dimensions for monthly "Depp conductivity" "Root zone conductivity""