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monroews / CEE4530

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Questions on response to Acid Rain Lab #104

Open rosiekrasnoff opened 5 years ago

rosiekrasnoff commented 5 years ago

We got two comments on our Acid Rain Lab that we are a little confused about:

"carbonate concentration is NOT constant. Need to use CMFR equation to describe carbonates as a function of time for the ANC closed model." "For your second experiment I suspect that you using the wrong initial CT value for the ANC closed model."

I think these are the same issue, and I understand the problem (that we used a constant but it is changing because of the incoming acid), but I'm not clear on what I need to do to fix it.

For the close model part, we have this as our code: carbs=ANC_0 ANC_closed=epa.ANC_closed(lakepH,carbs)

But as I understand it we need to use an equation to calculate the carbs (carbonate concentration), not just set it as a constant, but how do I do that and is there a function I can use?

monroews commented 5 years ago

In this lab we have the ANC that you measured using the Gran plot. Then we have 3 models for the ANC that each are based on different assumptions

  1. ANC conservative model only assumes that the ANC is conservative and that the reactor is a CMFR.
  2. Closed model assumes that the ANC equation applies, that the carbonate concentration is conservative and that the reactor is a CMFR.
  3. open model assumes that the ANC equation applies and that the carbonates are in equilibrium with the atmosphere at all times.