Pesticide Leaching Classes of Illinois Soils
Entry ID:
IGDNR_PESTLEACH
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Summary
This data set was designed for statewide evaluation of
agrichemical leaching characteristics. 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.
This is a statewide Arc/Info ... data set of soil characteristics
relating to pesticide leaching. It was generated to aid in
determining aquifer sensitivity to pesticide leaching in Illinois.
The source map was digitized at 1:250,000, but was developed from
source data mapped at 1:15,000. The publication of this map was 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 evaluating factors that
relate to water movement characteristics of the soil.
This pesticide data set was created by combining the nitrate
map interpretations with information on the distribution of
organic matter. (Pesticides are organic compounds that tend
to adsorb to soil organic matter, and so have their movement
in soil water retarded.)
The result is six pesticide leaching classes that group soil
associations based on the relative probability of pesticide movement
through the associated soil profiles. The ranking is qualitative,
and is based on the median leaching value of the soil map units
that comprise each soil association.
Pesticide leaching classes include: Excessive, High,
Moderate, Somewhat Limited, Limited, and Very Limited. See ISGS
EG 148 for the derivation of these classes.
To provide a measure of leaching class variability within each
association, leaching class range values were calculated. To
reduce the impact of extreme leaching class values on this
estimate, the the range values were trimmed so that the upper
and lower 10% of values were not included in the calculation.
These trimmed range values were used as an overprint on the
published map of pesticide leaching classes (see cross reference
entries).
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
Nitrate Leaching Class Ranges
Aquifer Sensitivity to Contamination by Pesticide Leaching in Illinois
Pesticide Leaching Classes of Illinois Soils (this data set)
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 COUNT-FED-FIPS
polygon item.
Related URL
Link:
GET DATA
Description:
Data available in Arc/Info export format.
Link:
VIEW EXTENDED METADATA
Description:
FGDC metadata on Pesticide Leaching Classes of Illinois Soils.
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Multimedia Sample
View full image
Caption:
Pesticide Leaching Classes of Illinois Soils
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Geographic Coverage
Spatial coordinates
| N: 42.0 |
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S: 36.0 |
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E: -87.0 |
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W: -91.0 |
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Data Set Citation
Dataset Creator:
Illinois State Geological Survey
Dataset Title:
Pesticide Leaching Classes of Illinois Soils
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
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Temporal Coverage
Start Date:
1995-01-01
Stop Date:
1995-12-31
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Location Keywords
Data Resolution
Latitude Resolution:
not determined
Longitude Resolution:
not determined
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Science Keywords
ISO Topic Category
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.
Ancillary Keywords
Data Set Progress
Originating Center
Data Center
Distribution
Distribution Media:
Online
Distribution Size:
11.1MB
Distribution Format:
ArcInfo export format
Fees:
No fees
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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
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Creation and Review Dates
Last DIF Revision Date:
2009-03-26
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Links
