Section 1 | Overview | |||
Originator | Minnesota Department of Natural Resources | |||
Title | CHEMPT | |||
Abstract | Data includes wells sampled in Chisago County, Minnesota for natural chemistry of groundwater by DNR staff for major cations and anions, trace elements, tritium, and carbon-14. Includes additional stable isotope, cation, anion, tritium, and carbon-14 data collected by others in Chisago County. | |||
Purpose | Chisago County Geologic Atlas, Part B, County Geologic Atlas Series C-22 | |||
Time Period of Content Date | ||||
Currentness Reference | data was acquired or accessed between 2010 and 2012 | |||
Progress | Complete | |||
Maintenance and Update Frequency | None Planned | |||
Spatial Extent of Data | Chisago County, Minnesota | |||
Bounding Coordinates | -97.27 -89.4 49.4 43.4 | |||
Place Keywords | Chisago County, Minnesota | |||
Theme Keywords | groundwater, water chemistry, residence time, stable isotopes, wells | |||
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 | Chisago County Geologic Atlas, Part A, County Geologic Atlas Series C-22, published by the Minnesota Geological Survey, 2010. More information and downloadable data for Part A is available on the MGS data site: http://www.mngs.umn.edu/county_atlas/countyatlas.htm | |||
Section 2 | Data Quality | |||
Attribute Accuracy | ||||
Logical Consistency | Data are topologically correct using ArcGIS 10.2 | |||
Completeness | Complete | |||
Horizontal Positional Accuracy | NA | |||
Vertical Positional Accuracy | NA | |||
Lineage | This file primarily contains well locations and associated inorganic and isotope chemistry sample analyses for wells sampled for the Chisago County Geologic Atlas, Part B. Chemistry data are managed in a MS Access database. Excel tables of chemistry data are available online for download at http://www.dnr.state.mn.us/waters/groundwater_section/mapping/chemdataaccess.html. | |||
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 | The water chemistry data dictionary, an online table displaying names and descriptions of fields that appear in chempt, is found at http://www.dnr.state.mn.us/waters/groundwater_section/mapping/chemdatadict.html
The water chemistry data dictionary lists all possible chemistry parameters in the County Geologic Atlas and Regional Hydrogeologic Assessment master database; some fields are not in this coverage. | |||
Detailed Citation | ||||
Table Detail: |
CHEMPT | |||
Field Name | Valid Values | Definition | Definition Source |
---|---|---|---|
RELATEID | Four 0's followed by 6-digit unique number for wells, or the Lake ID from DNR Lakes Database + 2 digits for a site at a lake (01,02, etc.), or a 2-digit county number followed by 'A' followed by a 8-digit unique number for a spring), or a letter M followed by numbers for river locations | ||
AQUIFER | Aquifer code. The aquifers are identified as "CEMS", "CTCE", "CTCM", "CTCG", "CWEC", "CWOC", "CWMS", "CJDN", "CJDN-CSTL", "CJSL", "CMFL", "CMTS", "CSLF", "CTCW", "MTPL", "QBAA", "QBUA", or "QWTA" | ||
AQUIFER_Q | Quaternary aquifer name, usually mapped at county scale. The buried aquifers are identified as "sl", "sc", "se", "sx", "sr", or "sp". Quaternary aquifers are named after surficial and buried sand units shown on Plate 4, Part A. The surficial aquifer is identified as "surf". Bedrock aquifers are represented by "bdrk". | ||
XSEC | Cross Section line number from cross sections developed by the MGS for Part A sand grid model | ||
TRITIUM | Tritium in Tritium Units (TU). | ||
TRIT_AGE | Residence time estimated from tritium value. "cold war era" - greater than 15 TU, "recent" - 8 to 15 TU, "mixed" - greater than 1 TU and less than 8 TU, "vintage" - less than or equal to 1 TU | ||
CHLORIDE | Chloride concentration in milligrams per liter | ||
BROMIDE | Bromide concentration in milligrams per liter | ||
CL_BR | Chloride Bromide Ratio | ||
NITRATE_N | Nitrate concentration in milligrams per liter reported as Nitrogen | ||
DEUTERIUM | Deuterium (per mil) | ||
OXYGEN_18 | Oxygen-18 (per mil) | ||
DATASOURCE | Source of data | ||
SITETYPE | Type of site where water sample was collected. Site types are identified as "Lake", "River", "Spring", "Well", "Wetland" | ||
C14_YEARS | Groundwater residence time in years, estimated by carbon-14 isotope analysis (model estimated age in years rounded to 1 significant digit) |
Section 6 | Distribution | |||
Publisher | Minnesota Department of Natural Resources, Ecological and Water Resources Division | |||
Publication Date | 2014 | |||
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 | CHEMPT | |||
Distribution Liability | This map was prepared from publicly available information only. Every reasonable effort has been made to ensure the accuracy of the factual data on which this map is 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 Minnesota Geological Survey and the 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. | |||
Ordering Instructions | Download zip file of metadata, shapefiles, and feature classes by clicking "I AGREE" below.
The geodatabase (Chisago_c22.gdb) is the preferred format. Shapefiles are also included (Chisago_c22_shape) for those who require that data format. The shapefiles were converted from feature classes in a file geodatabase. Because some of the data contain null values, which are not supported by shapefiles, we suggest using the shapefiles with caution. The conversion to shapefiles changes null values to zeros or blanks and makes querying the data more difficult. PDFs of the Chisago County Geologic Atlas plates can be downloaded at: http://www.dnr.state.mn.us/waters/programs/gw_section/mapping/platesum/chiscga.html | |||
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 | 07/24/2015 | |||
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 |