[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Nitrate Predictions




I have no idea what physical system you are dealing with, but with no data
except nitrate, I think all you can consider is a simple mass-balance
model: nitrate = nitrate_in - nitrate_out - consumption. Perhaps you have
enough data to fit a first order decay constant for consumption.

David

David Parkhurst (dlpark@xxxxxxxx)
U.S. Geological Survey
Box 25046, MS 413
Denver Federal Center
Denver, CO 80225


                                                                                                                              
                      "Vinson, Janie"                                                                                         
                      <Janie_Vinson@xxx         To:      "'dlpark@xxxxxxxx'" <dlpark@xxxxxxxx>, "'nplummer@xxxxxxxx'"         
                      thtech.com>               <nplummer@xxxxxxxx>                                                           
                                                cc:                                                                           
In-Reply-To: <FC461288E0BAD5119BCE00306E00411C7D177B@xxxxxxxxx>
                      02/05/02 01:45 PM         Subject: 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





Project Home Page
Complete Water Resources Division Software
USGS Home Page
Water Resources Division Home Page
NRP Home Page
Help Page
USGS Privacy Statement        Disclaimer

Please note that some U.S. Geological Survey (USGS) information accessed through this page may be preliminary in nature and presented prior to final review and approval by the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the sole responsibility of the user.

Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. 


The URL of this page is: http://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqc/mail/msg00380.html
Email:dlpark@usgs.gov
Last modified: $Date: 2005-09-13 21:04:21 -0600 (Tue, 13 Sep 2005) $
Visitor number 1128 since Jan 22, 1998.