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sediment retention 3.0 mass balance equation clarification

amontanaamontana Member
edited May 2014 in Terrestrial Models
I AM INTERPRETING RESULTS FROM MODEL SEDIMENT RETENTION OCCUPYING INVEST 3.0.

I have a question:
outpout watershed_outputs.dbf in the sum of the values ​​in the columns
sed_export + excatamente upret_tot be equal to the column: usle_tot

sed_export (erosion)+ upret_tot (avoided erosion) = usle_tot (potential erosion)???
Post edited by Rich on

Comments

  • RichRich Administrator, NatCap Staff
    close, the usle is the source, so the balance should be:

    usle_tot = sed_export + upret_tot

    Note in the 3.0.0 model the balance of this equation is off by a frustratingly small 0.04% error. We believe it will be fixed in the next InVEST release.
  • RichRich Administrator, NatCap Staff
    Ugh Brad just pointed out that this is the exact equation you have! The resolution on my screen made your + look like a -.

    Unfornately the 0.04% error is still there though. :)
  • thanks for the reply, if there is indeed a small error in total when added.
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