aqbdsnpy
Go to Section:- Overview
- Data Quality
- Data Organization
- Coordinate System
- Attributes
- Distribution - Get Data
- Metadata Reference
Section 1: Overview
Originator:Minnesota Department of Natural Resources
Title:
aqbdsnpy
Abstract:
Buried sand and gravel aquifer and bedrock surface pollution sensitivity in Nicollet County, Minnesota
Purpose:
Nicollet County Geologic Atlas, Part B, County Geologic Atlas Series C-25
Time Period of Content Date:
Currentness Reference:
data were acquired or accessed between 2012 and 2016
Progress:
Complete
Maintenance and Update Frequency:
None Planned
Spatial Extent of Data:
Nicollet County, Minnesota
Bounding Coordinates:
-94.8
-93.9
44.5
44.1
Place Keywords:
Nicollet County, Minnesota
Theme Keywords:
pollution sensitivity, buried sand and gravel aquifer, buried sand aquifer, bedrock surface
Theme Keyword Thesaurus:
None
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:
Nicollet County Geologic Atlas, Part A, County Geologic Atlas Series C-25, published by the Minnesota Geological Survey (MGS), 2012. More information and downloadable data for Part A are available on the MGS data site: http://www.mngs.umn.edu/county_atlas/countyatlas.htm
Section 2: Data Quality
Attribute Accuracy:
1:100,000
Logical Consistency:
Data are topologically correct using ArcGIS 10.4.1
Completeness:
Complete
Horizontal Positional Accuracy:
File was snapped to statewide 30 meter LiDAR data.
Vertical Positional Accuracy:
NA
Lineage:
Sensitivity calculations were made based on the cumulative thickness of fine-grained sediment overlying the top of an aquifer or the bedrock surface. The cumulative thickness was calculated from the till thickness data from Part A provided by the MGS.
The pollution sensitivity maps are based on the concept of mapping focused recharge areas where surface water can rapidly move downward through interconnected sand and gravel layers. The fine-grained sediment between aquifers is assumed to act as an aquitard that restricts the vertical movement of groundwater between aquifers. Cumulative thicknesses of fine-grained sediment 10 feet or less are rated very high sensitivity, >10 to 20 feet are rated high, >20 to 30 feet are rated moderate, >30 to 40 feet are rated low, and >40 feet are rated very low.
Raster calculator within Arcmap 10.2 was used to calculate the cumulative fine-grained sediment thickness. Rasters were reclassified and converted to polygons.
The procedure document for determining buried aquifer and bedrock surface pollution sensitivity based on cumulative fine-grained sediment thickness is available at http://files.dnr.state.mn.us/waters/groundwater_section/mapping/gw/gw02_ps-babs.pdf
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:
Detailed Citation:
Table Detail:
AQBDSNPY| Field Name | Valid Values | Definition | Definition Source |
|---|
| AQUIFER_Q | - | Quaternary aquifer name, usually mapped at county scale. Quaternary aquifers are named after buried sand units shown on Plate 5, Part A. The surficial aquifer is identified as "ss". Bedrock aquifers are represented by "bdrk". | |
| RATING | - | "VH" is very high, "H" is high, "M" is moderate, "L" is low, "VL" is very low | |
Section 6: Distribution
Publisher:
Minnesota Department of Natural Resources, Ecological and Water Resources Division
Publication Date:
01/17/2017
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:
aqbdsnpy
Distribution Liability:
These data were prepared from publicly available information only. Every reasonable effort has been made to ensure the accuracy of the factual data on which these files are based. However, the Department of Natural Resources does not warrant the accuracy, completeness, or any implied uses of these data. Users may wish to verify critical information; sources include both the references here and information on file in the offices of the Department of Natural Resources.
Online Linkage: I AGREE
to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process, link to a service, or provide more instructions. See "Ordering Instructions" above for details.
Section 7: Metadata Reference
Metadata Date:
01/17/2017
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