Aquifer Sensitivity to Contamination by Nitrate Leaching in Illinois
Entry ID: IGDNR_NO3AQSENS

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Summary
Abstract: This data set was designed for statewide evaluation of
agrichemical leaching characteristics and associated
aquifer sensitivity to contamination. It was created to
classify soils and aquifer settings according to predictions
of leaching potential. The classifications have not been
validated by the results of water quality sampling and
accordingly, the reliability of these aquifer sensitivity
ratings as predictors of water quality has not been evaluated.


This is a statewide Arc/Info data set for evaluating the potential
for contamination of shallow aquifers by nitrate. The sources of
this data set were published and digitized at 1:250,000; however,
the soils map and depth to aquifer map (stack-unit map) were
generated from source data mapped at 1:15,000 and 1:64,000,
respectively. This aquifer sensitivity map was published at
1:500,000. Nominal scale is 1:250,000.

Two statewide data sets were identified as containing
information that would be useful for producing aquifer
sensitivity maps: a soil association map (and database)
and a map of geologic materials to a depth of 50 feet
(Stack-unit map). The soil association map and database
were used in an interpretive mapping model that generated
a map of nitrate leaching classes by examining factors that
relate to water movement characteristics of the soil.

The Stack-Unit map was used to create a map of depth to the
uppermost aquifer, which was then combined with the map of
nitrate leaching classes. This combined map was interpreted
based on the sensitivity of aquifers (to create a map of
aquifer sensitivity) to contamination by nitrate leaching.
Six aquifer sensitivity classes are indicated: Excessive, High,
Moderate, Somewhat limited, Limited, and Very limited.

Disturbed land and surface water areas are also shown.

These data are to be used in conjunction with ISGS Environmental
Geology report 148. This data set is one of a suite of six
related data sets (listed below). Full citation details are
available in the Cross References section.

Aquifer Sensitivity to Contamination by Nitrate Leaching in Illinois
Nitrate Leaching Classes of Illinois Soils (this data set)
Nitrate Leaching Class Ranges

Aquifer Sensitivity to Contamination by Pesticide Leaching in Illinois
Pesticide Leaching Classes of Illinois Soils
Pesticide Leaching Class Ranges

This coverage includes county lines. These lines are not directly
relevant to the data, but are necessary for technical reasons.
Without the additional county lines, some of the polygons exceed
the maximum allowable vertex limit in ARCPLOT. This problem is
solved by the additional county lines, which serve to divide polygons
with too many vertices into smaller units. Accordingly, to remove
the county lines from maps created with ARCPLOT, the DROPLINE
command must be used on conjunction with the COUNTY_NAME
polygon item.

Related URL
Link: GET DATA
Description: Data available in Arc/Info export format.


Link: VIEW EXTENDED METADATA
Description: FGDC metadata on Aquifer Sensitivity to Contamination by Nitrate Leaching in
Illinois.


This data set description is a member of a collection. Click to see members of this collection.

Geographic Coverage
 N: 42.0 S: 36.0  E: -87.0  W: -91.0

Data Set Citation
Dataset Originator/Creator: Illinois State Geological Survey
Dataset Title: Aquifer Sensitivity to Contamination by Nitrate Leaching in Illinois
Dataset Series Name: ISGS GIS Database
Dataset Release Date: 1995
Dataset Release Place: Champaign, Illinois
Dataset Publisher: Illinois State Geological Survey
Version: 1.0
Data Presentation Form: map


Temporal Coverage
Start Date: 1995-01-01
Stop Date: 1995-12-31


Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ILLINOIS


Data Resolution
Latitude Resolution: not determined
Longitude Resolution: not determined


Science Keywords
AGRICULTURE >AGRICULTURAL CHEMICALS >FERTILIZERS    [Definition]
AGRICULTURE >AGRICULTURAL CHEMICALS >PESTICIDES    [Definition]
AGRICULTURE >ANIMAL SCIENCE >ANIMAL MANURE AND WASTE    [Definition]
HUMAN DIMENSIONS >ENVIRONMENTAL IMPACTS >CONTAMINANT LEVELS/SPILLS    [Definition]
HUMAN DIMENSIONS >ENVIRONMENTAL GOVERNANCE/MANAGEMENT >LAND MANAGEMENT    [Definition]
HUMAN DIMENSIONS >ENVIRONMENTAL GOVERNANCE/MANAGEMENT >LAND MANAGEMENT >LAND USE CLASSES    [Definition]
TERRESTRIAL HYDROSPHERE >GROUND WATER >GROUNDWATER CHEMISTRY    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >CONTAMINANTS    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >NITROGEN COMPOUNDS    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >TOXIC CHEMICALS    [Definition]
LAND SURFACE >EROSION/SEDIMENTATION >SEDIMENT CHEMISTRY    [Definition]
LAND SURFACE >LAND USE/LAND COVER >LAND PRODUCTIVITY    [Definition]
LAND SURFACE >LAND USE/LAND COVER >LAND RESOURCES    [Definition]
LAND SURFACE >LAND USE/LAND COVER >LAND USE CLASSES    [Definition]
LAND SURFACE >SOILS >SOIL CHEMISTRY    [Definition]


ISO Topic Category
FARMING
ENVIRONMENT


Access Constraints
none


Use Constraints
Reproduction or redistribution of copyrighted digital data sets or
products derived therefrom outside of licensees' organization or
entity is expressly forbidden. The only exception is redistribution
to consultants working for the licensee, and then only for purposes,
related to work for the licensee. Such consultants may not further
reproduce or redistribute these data sets. None of these data shall
be electronically duplicated on magnetic or optical media for use by
others, in whole or in part, without permission of the appropriate
custodial division within DNR. Any hardcopies utilizing DNR data sets
shall clearly indicate their source. If the licensee has modified the
data in any way they are obligated to describe the types of
modifications they have performed on the hardcopy map. Licensee
specifically agrees not to misrepresent DNR data sets, nor to imply
that changes they made were approved by DNR. These data are not to be
used for commercial profit.


Keywords
AGRICULTURE
AQUIFER
CONTAMINATION
GEOLOGY
GROUNDWATER
LEACHING
NITRATE
SOIL
GIS
Geographic Information Systems


Data Set Progress
COMPLETE


Originating Center
IGDNR


Data Center
Geological Survey, Dept. of Natural Resources, Illinois    [Information]
Data Center URL: http://www.isgs.uiuc.edu/

Data Center Personnel
Name: DATABASE ADMINISTRATOR ILLINOIS STATE GEOLOGICAL SURVEY
Phone: 217-333-5102
Fax: 217-333-2830
Email: denhart at nomad.isgs.uiuc.edu
Contact Address:
615 East Peabody Drive
City: Champaign
Province or State: Illinois
Postal Code: 61820
Country: USA



Distribution
Distribution_Media: Online
Distribution_Size: 17.6MB
Distribution_Format: Arc/Info export format
Fees: No fees


Personnel
DON KEEFER
Role: DIF AUTHOR
Role: TECHNICAL CONTACT
Phone: 217-244-2786
Fax: 217-333-2830
Email: dkeefer at geoserv.isgs.uiuc.edu
Contact Address:
615 East Peabody Drive
City: Champaign
Province or State: Illinois
Postal Code: 61820
Country: USA



Creation and Review Dates
Last DIF Revision Date: 2009-03-26

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