The resources link for this credit directs us to use the ETo software calculator from the FAO website:
http://www.fao.org/nr/water/eto.html...

We had used Theoretical Performance Calculation (Option 2) for initial v2009 certification, can we still utilize Option 2 (No irrigation meter installed: Calculated ...

i am working on the project where project team use the STP Non potable water used for irrigation purpose. so i am reducing the 100% potable water. can i sufficient to achieve this credit.

I noticed the worksheet has some errors:

a) "Baseline Calculation" tab: the Watering Demand column is subtracting rainfall from ETo, instead of ETo being subtracted from rainfall

b...

Does reclaimed water used for irrigation need to be submetered?

If we install subsystem metering for the irrigation systems to comply with WE credit Water Metering can we still select Option 2 (No irrigation meter installed: Calculated...

Does the 30% reduction need to be accomplished through landscape efficiency first and then add up alternative water sources, or may this be accomplished through any landscape irrigation means (...