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Nitrate Predictions



David and Niel,
 
Thanks for your time, I know that you are both very busy.  Your student in 1998, I hope that you will have an answer to a rather simplistic question:
 
what model to use to predict nitrate levels over the long term (years)?
 
The data could be as minimalistic as only nitrate concentrations (no alkalinity, etc.), so my next question: what is the minimal amount of data necessary to run the model of choice?  Obviously, efficiency is a primary factor.
 
Any help/guidance is greatly appreciated_
 
Janie


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