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All Topics | Topic "Irrigaiton Fraction"
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Author Message
Mr. Pham Quoc

Subject: Irrigaiton Fraction   
Posted: 12/22/2015 Viewed: 9520 times
Hellow WEAP users
I cited from WEAP user guide
Runoff = Max (0, Precipitation available for ET – potential ET)
+ Precipitation*[effective precipitation]
+ Supply*[1- Irrigation Fraction]
This function for Rainfall Runoff Method.
In WEAP interface, where I can modify "irrigation fraction"?
And what is definition of HU - hydro unit in WEAP?
Thank you !
Ms. Stephanie Galaitsi

Subject: Re: Irrigaiton Fraction   
Posted: 12/28/2015 Viewed: 9445 times
Dear Pham,

Irrigation fraction is the percentage of the supplied water available for ET consumption (i.e., irrigation efficiency). When using the Rainfall Runoff (soil moisture model), you can select whether to have irrigated areas in your catchment by right-clicking on the catchment in the schematic, going to "General Info" and checking "includes irrigated areas". Once that button has been clicked, you will see an additional tab for data entry in your catchment element called "Irrigation". The first sub-category is % of irrigated area ("Irrigated Area).

Where do you see mention of HU?
Mr. Pham Quoc

Subject: Re: Irrigaiton Fraction   
Posted: 12/30/2015 Viewed: 9427 times
Thank you so much for your meticulous instruction.
It's very useful to me.
I see "HU" in the WEAP manual, in the Runoff Algorithm Calculation part.(Along with notation "LC"-land Cover)
Ms. Stephanie Galaitsi

Subject: Re: Irrigaiton Fraction   
Posted: 12/30/2015 Viewed: 9417 times
Looks like it is "hydro-unit" (HU can sometimes also mean the Heat Unit).
Mr. Quoc Pham

Subject: Re: Irrigaiton Fraction   
Posted: 12/31/2015 Viewed: 9406 times
Yes, but in this case, what does "hydro - unit" mean in WEAP?
Mr. Jack Sieber

Subject: Re: Irrigaiton Fraction   
Posted: 12/31/2015 Viewed: 9401 times
Hydro unit, an abbreviation of hydrological unit, is a catchment.
Mr. Quoc Pham

Subject: Re: Irrigaiton Fraction   
Posted: 12/31/2015 Viewed: 9397 times
Thank you Jack !
It's clear
Topic "Irrigaiton Fraction"