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

About WEAP

What's New?
Sample Screens
History and Credits

Using WEAP
User Guide
Videos (YouTube)

User Forum
Members List
Edit Profile

Additional Support
University Courses

About Us
SEI-US Water Resources Program
Please Contact Us

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

Link WEAP and LEAP for combined Water-Energy planning.
Watch a video demo!

User Forum

All Topics | Topic "Irrigation Efficiency"
Log in to post new messages or reply to existing messages.
Author Message
Dr. Hosein Alizadeh

Subject: Irrigation Efficiency   
Posted: 6/17/2017 Viewed: 11024 times
Hi Stephanie,
I use WEAP for irrigation planning and I use Plant Growth Method.
My question is on how irrigation efficiency can be taken into account in the method?
Best Regards

Ms. Stephanie Galaitsi

Subject: Re: Irrigation Efficiency   
Posted: 6/23/2017 Viewed: 11006 times
Hi Hosein,

In the Plant Growth Model, the irrigation efficiency is a function of two parameters. The first is the Distribution Uniformity (DU), which is used in the calculation of the irrigation requirement. When an irrigation is triggered, the deficit between the soil moisture level and field capacity is divided by the DU to obtain the irrigation requirement (also called them demand, but taking into account other factors like leakage in the pipes). The second parameter is the irrigation application rate. This is a technology dependent parameter and it is used to determine the amount of surface runoff. The irrigation application rate is compared to the infiltration rate (which is a function of soil moisture status) to determine runoff.

By changing the parameters that impact these calculations, you can model irrigation efficiency.
Topic "Irrigation Efficiency"