(category : Open Data Initiative)
I did a bit statistical analysis of water balance in ecoinvent cut-off 3.1 version in SimaPro. What's shown is the difference between water emitted to air and "W-R", a.k.a.
[water emitted to air ( consumption) / (water withdrawal- water release) - 1] *100%
It looks like water difference of ~7000 (out of 13000, >50%) processes are within 10% (+/-), another 6000 processes have much bigger difference. I suspect this might be caused by the following two factors:
1. Properties: Water embodied in mass properties ( e.g irrigation water, tap water, wastewater, etc)
2. Boundary: Issue related to boundary of water flows accounting, i.e. should salt water , turbined water being considered into the water balance
If boundary is okay, it suggests water in mass properties have to be carefully considered in order to do a proper water balance accounting.
How do you think? If you'd like to comment, pls send an email to me : email@example.com
P.S. I'm in disucssion with ecoinvent to figure out what's the best way to calculate water consumption. Stay tuned.
Posted by Xun Liao on Wednesday 2 September 2015 at 19:57