+2 votes
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Hello!

I ran an impact analysis using TRACI 2.1 on a simple potato production product system within openLCA (reference process is "potato production | potato | Cutoff, U" from ecoinvent (cut-off, regionalized); 1000 kg as functional unit). I am having trouble accurately interpreting the results for eutrophication impact in the Sankey diagram, which lists the final process -- "potato production | potato | Cutoff, U" -- as having:
Direction contribution: 3.737 kg N eq (100.00%)
Upstream total: 4.422 kg N eq (100.00%)
The upstream total is accurate and adds up to 100% as anticipated both in the Sankey diagram and the contribution tree. The direct contribution value is correct at 3.737 kg N eq, however we are unclear of why the percentage is still at 100%.
Thank you in advance for any insight on why this might be the case!

Best,
Tetyana

in openLCA by (170 points)
retagged by
by (20.3k points)
edited by
Can you add a screenshot to your question or maybe even share the product system with us a s a JSON-LD export (gd@greendelta.com).
by (170 points)
Added a screenshot of the Sankey diagram to the original post (wasn't able to attach to comment). Working with only unit processes (per ecoinvents layout); name of reference process if you would like to look it up is above. Product system JSON-LD export sent via WeTransfer to gd@greendelta.com.

1 Answer

0 votes
ago by (20.3k points)
edited ago by
The problem has been fixed by our developers: https://github.com/GreenDelta/olca-app/commit/69e2d4676f0f73d67eaa88e948b0417e9ac16157.

The fix will be available with the upcoming versions of openLCA (>1.8.0)You can follow us on LinkedIn or Twitter to receive updates about new releases..
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