- March 19, 2019 at 7:25 pm #5853
Dear EFDC team and users:
I have 2 questions:
1.What does that means:diatoms (mg/L as c)? Diatom alge caculated by carbon? How to caculate? And why doesn’t the simulation change ？
2.What the real meaning of COD in EFDC? I heard that COD in EFDC is not the same meaning with that in china.And the simulation also doesn’t change…
Attachments:You must be logged in to view attached files.March 28, 2019 at 5:23 am #5864
1. It is diatom algae concentration as Carbon. That quantity is measured by laboratory analysis using the ash-free dry weight method. It is not the same thing as the concentration of chl-a that you might get from a photometer, as that method can pick up the signal of pigments other than chl-a. I have attached a document regarding this which was published by the United States Geological Survey. Hopefully, this will be a helpful resource for you.
2. You can find more information about the Chemical Oxygen Demand (COD) on our knowledge base here: https://eemodelingsystem.atlassian.net/wiki/spaces/ETG/pages/2356262/220.127.116.11+Chemical+Oxygen+Demand
Hope that helps.
Attachments:You must be logged in to view attached files.March 28, 2019 at 5:43 pm #5869
Thank you very much.I think this information will help me a lot.I’ll read it carefully
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