Minnesota Pollution Control Agency
Metropolitan Area Groundwater Model

The calibration datasets were developed from the County Well Index database. The following
steps were taken to produce the datasets:

1) CWI sort for UTM wells,
2) ARCVIEW sort to identify hydrologic province,
3) Random selection of 1400 wells to develop a variogram based on location and head
   elevation (except where total number of wells is less than 1400),
4) Random selection of up to 1000 wells to submit to cross-validation to remove outliers,
5) Removal of 10% of the wells with the highest absolute value residual of observed head minus
   estimated head (a product of the cross-validation procedure),

This leaves up to 900 wells for the calibration dataset.  Eventually verification datasets will 
be prepared in the same fashion.  Five columns of information are provided:

X location (UTM)
Y location (UTM)
Head	   (meters)		
Unique#
Aquifer

English units for head elevations can be converted by user.


Questions about this process?  Contact:

Andrew Streitz 	
Minnesota Pollution Control Agency
NE Regional Office- Duluth
andrew.streitz@pca.state.mn.us
(218) 723-4929	Voice
(800) 657-3864	Voice

Doug Hansen
Minnesota Pollution Control Agency
520 Lafayette Rd, St. Paul
douglas.hansen@pca.state.mn.us
(651) 296-9192

John Seaberg
Minnesota Pollution Control Agency
Minnesota Pollution Control Agency
520 Lafayette Rd, St. Paul
john.seaberg@pca.state.mn.us
(651) 296-0550