Water-Table Elevation and Depth to Water Table, Minnesota Hydrogeology Atlas series HG-03

This page last updated: 04/11/2016
Metadata created using Minnesota Geographic Metadata Guidelines


Go to Section:
1. Overview
2. Data Quality
3. Data Organization
4. Coordinate System
5. Attributes
6. Distribution - Get Data
7. Metadata Reference

Section 1 Overview
Originator Minnesota Department of Natural Resources (DNR), County Geologic Atlas Program
Title Water-Table Elevation and Depth to Water Table, Minnesota Hydrogeology Atlas series HG-03
Abstract This dataset estimates the water-table elevation from three primary sources: depth to water table in saturated soils from Natural Resources Conservation Service data (which are converted to elevation), elevation of surface water bodies, and the static water elevation in water table wells with verified locations. With the use of a 30-meter DEM derived using LiDAR data, depth to water table is derived from the water-table elevation.
Purpose This dataset was developed to provide a statewide estimate of water-table elevation and depth to water table, for use by the public and state regulators for planning and modeling purposes.
Time Period of Content Date 2015
Currentness Reference Data were obtained in 2015 and re-evaluated in January 2016.

NRCS soil survey, DNR Water Features, and Minnesota County Well Index data were complete and accurate in 2015. National Wetland Inventory data is based on 2010 and 2011 digital aerial photos and was last updated in 2015. Stream Routes with Stream Types were regenerated in 2013.
Progress Complete
Maintenance and Update Frequency Irregular
Spatial Extent of Data Minnesota
Bounding Coordinates -97.23
-89.53
49.37
43.5
Place Keywords Minnesota
Theme Keywords water, water table, hydrogeology, depth, elevation
Theme Keyword Thesaurus
Access Constraints None
Use Constraints Users may wish to verify critical information; sources include both the references here and information on file in the offices of the Minnesota Geological Survey and the Minnesota Department of Natural Resources. Every effort has been made to ensure the interpretation shown conforms to sound geologic and cartographic principles. This map should not be used to establish legal title, boundaries, or locations of improvements.
Contact Person Information Holly Johnson, GIS Specialist
Minnesota Department of Natural Resources
500 Lafayette Rd
St. Paul, MN  55155-4025
Phone: 651-259-5693
Email: holly.je.johnson@state.mn.us
Browse Graphic None available
Associated Data Sets County Geologic Atlas, available at www.dnr.state.mn.us/waters/groundwater_section/mapping/status.html

Section 2 Data Quality
Attribute Accuracy 1:120,000
Logical Consistency Data are topologically correct using ArcGIS 10.2.2
Completeness Complete
Horizontal Positional Accuracy
Lineage Water-table information was derived from the following datasets in ArcGIS 10.2:
- NRCS soil survey tabular and spatial data, using the minimum annual depth to water table values for non-perched wet soil polygons. A grid of points spaced 100 meters apart was established over the wet soil polygons. The depth to water table values from each polygon were extracted to this grid of points across the state. The water-table elevation value for each point was equal to the 30-meter DEM derived using LiDAR data value minus the minimum annual water table depth.
- National Wetlands Inventory Circular 39 Classification, 2009-2015, using features for which water regimes = C, F, G, and H. National Wetland Inventory features with an area greater than one acre were given points spaced 100 meters apart around the perimeter of the feature. Water features with an area less than one acre were given a centroid. The water-table elevation value for each point was obtained from the 30-meter DEM derived using LiDAR data. (Two updates have been released to date: East-Central and Southern Minnesota. This updated NWI data was used where available; DNR Water Features was used in place of NWI data in the rest of the state.)
- DNR Water Features, using features for which wb_class = Artificial Basin, Fish Hatchery Pond, Lake or Pond, Reservoir, Shallow Water, or Wetland. Water features with an area greater than one acre were given points spaced 100 meters apart around the perimeter of the feature. Water features with an area less than one acre were given a centroid. The water-table elevation value for each point was obtained from the 30-meter DEM derived using LiDAR data.
- Stream Routes with Stream Types, using features for which strm_type_desc = Centerline (River), Drainage Ditch (Perennial), or Stream (Perennial). The streams were converted to points spaced 100 meters apart along each feature. The water-table elevation value for each point was obtained from the 30-meter DEM derived using LiDAR data.
- Minnesota County Well Index (Verified Locations), using features for which Aquifer = QWTA. The water-table elevation value for each point was equal to the 30-meter DEM derived using LiDAR data value minus the static water level depth.

The points were merged into one feature class and the Topo to Raster tool was run on the feature class to generate the water-table elevation model with a 60-meter cell size; drainage was not enforced.

The depth to water table raster was created by subtracting the water-table elevation raster model from the 30-meter DEM derived using LiDAR data.

Section 3 Spatial Data Organization (not used in this metadata)

Section 4 Coordinate System
Horizontal Coordinate Scheme Universal Transverse Mercator
UTM Zone Number 15
Horizontal Datum NAD83
Horizontal Units meters

Section 5 Attributes
Overview This data displays the water-table elevation (wt_elev) and depth to water table (dep_wt) for the state of Minnesota.
Detailed Citation
Table Detail:
Water-Table Elevation
Field NameValid ValuesDefinitionDefinition Source
ELEVATION
-
Modeled water-table elevation in feet above the North American Vertical Datum of 1988

Depth to Water Table
Field NameValid ValuesDefinitionDefinition Source
DEPTH
-
Modeled depth to water table in feet below land surface


Section 6 Distribution
Publisher Minnesota Department of Natural Resources
Publication Date 06/02/2016
Contact Person Information Holly Johnson, GIS Specialist
Minnesota Department of Natural Resources
500 Lafayette Rd
St. Paul, MN  55155-4025
Phone: 651-259-5693
Email: holly.je.johnson@state.mn.us
Distributor's Data Set Identifier geos_hydrogeology_atlas_hg03
Distribution Liability The Minnesota Department of Natural Resources General Geographic Data License Agreement is online: www.dnr.state.mn.us/sitetools/data_software_license.html
Ordering Instructions Please visit the download page for this dataset on the Minnesota Geospatial Commons website using the web link below (Online Linkage).
Online Linkage I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process or link to download information. See "Ordering Instructions" above for details.

Section 7 Metadata Reference
Metadata Date 04/11/2016
Contact Person Information Holly Johnson, GIS Specialist
Minnesota Department of Natural Resources
500 Lafayette Rd
St. Paul, MN  55155-4025
Phone: 651-259-5693
Email: holly.je.johnson@state.mn.us
Metadata Standard Name Minnesota Geographic Metadata Guidelines
Metadata Standard Version 1.2
Metadata Standard Online Linkage http://www.mngeo.state.mn.us/committee/standards/mgmg/metadata.htm


This page last updated: 04/11/2016
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