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Groundwater Vulnerability Pesticide - Surficial Aquifer (FL)

DEP.DRASTIC_INTERMEDIATE_AQUIFER
Data format: SDE Feature Class File or table name: DEP.DRASTIC_SURFICIAL_AQUIFER Coordinate system: Albers Conical Equal Area Theme keywords: Aquifer, DRASTIC, Surficial Abstract: DRASTIC coverage for the Surficial Aquifer System

DEP.DRASTIC_INTERMEDIATE_AQUIFER

Data format: SDE Feature Class

File or table name: DEP.DRASTIC_SURFICIAL_AQUIFER

Coordinate system: Albers Conical Equal Area

Theme keywords: Aquifer, DRASTIC, Surficial

Abstract: DRASTIC coverage for the Surficial Aquifer System

Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.

Identification Information:

Citation:

Citation information:

Originators: DEP/DWF
*Title:: DEP.DRASTIC_SURFICIAL_AQUIFER
*File or table name: DEP.DRASTIC_SURFICIAL_AQUIFER
Publication date: 1990s
*Geospatial data presentation form: vector digital data
*Online linkage: Server=arcsde; Service=sde1; User=dep; Version=SDE.DEFAULT

Description:

Abstract:

DRASTIC coverage for the Surficial Aquifer System

*Language of dataset: en

Time period of content:

Time period information:

Single date/time:

Calendar date: 1990s

Currentness reference:

ground condition

Status:

Progress: Complete
Maintenance and update frequency: None planned

Spatial domain:

Bounding coordinates:

*West bounding coordinate: -87.635583
*East bounding coordinate: -79.872043
*North bounding coordinate: 31.042459
*South bounding coordinate: 24.506134

Local bounding coordinates:

*Left bounding coordinate: 53014.683500
*Right bounding coordinate: 794011.312500
*Top bounding coordinate: 781562.689500
*Bottom bounding coordinate: 62290.886500

Keywords:

Theme:

Theme keywords: Aquifer, DRASTIC, Surficial
Theme keyword thesaurus: none

Place:

Place keywords: Florida

Access constraints: none

Use constraints:

Drastic maps are most useful as a generalized tool to assess regional potential
aquifer vulnerability.  Except for soils and topography layers, the source maps
used were regional, water management district or statewide in scale and scope of
coverage. This precludes the use of DRASTIC maps as a site-specific tool for
assessing potential aquifer vulnerability.

Browse graphic:

Browse graphic file name: \\bis-4cgxh11\metadata\thumbnails\dep.drastic_surficial_aquifer.gif
Browse graphic file type: GIF

*Native dataset format: SDE Feature Class

*Native data set environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.1.2.671

Data Quality Information:

Lineage:

Source information:

Source citation:

Citation information:

Title:: Dw, Nr, Am, Sm, T, Iv, Hc & Hydrogeologic Setting

Source scale denominator: 100,000

Type of source media: CAD DXF and Dbase Files

Process step:

Process description:

DRASTIC is a system developed jointly by the U.S. Environmental Protection
Agency (USEPA) and the National Water Well Association (NWWA) to map potential
aquifer vulnerability.  The methodology utilizes existing hydrogeological
information to produce color-coded maps which display areas that are more or
less likely to be affected by pollution introduced on the ground's surface.
These maps depict areas which are more or less sensitive to land use changes
which may affect ground water quality. 
 
Drastic maps are composites made up of eight individually mapped hydrogeological
parameters. Seven of these parameters (depth to water - Dw, net recharge - Nr,
aquifer media - Am, soil media - Sm, topography - T, impact of the vadose zone
- Iv and hydraulic conductivity - Hc) are used to derive the DRASTIC summary
index score.  The eighth, hydrogeologic setting, is useful for general map
interpretation but, it is not included in the summary index.   
 
A separate polygon coverage was built for each parameter and then the eight
coverages are composited into a single coverage with all information from the
originals for the FASTCAD drawings.  These drawings were then converted to
ARC/INFO coverages which edited by county. The county coverages were then  
edgematched and mapjoined into a statewide coverage.  The statewide coverages,
for each aquifer, was then dissolved for the individual DRASTIC parameters for
further error checking of the composite coverages.  Once all errors were
corrected, the composite attributes were recalculated for the final statewide
DRASTIC coverages. 
 
The original county CAD DRASTIC drawings were converted to ARC/INFO files, built
as point, line and polygon coverages and edited for digitizing errors.  The
Dbase files containing the attribute data were then joined to polygon attribute
tables in ARC/INFO.  County coverages were then edgematched and mapjoined to
create a statewide coverage.  The statewide coverage was then projected to
Albers HPGN and dissolved on the individual DRASTIC parameters and edited for
county boundary discrepancies.  The dissolved layers were intersected back
together, the weighted fields were calculated and summed to produce the final  
DRASTIC Index values which were then used to color, according to prescribed
ranges, the final coverage.

In November, 1999, the shapefile of this dataset was inserted into Spatial
Database Engine (SDE 3.0.2).

Process software and version: ARC/INFO 7.1.1, ARC/View 3.0a

Process date: 04/01/98

Process contact:

Contact information:

Contact organization primary:

Contact person: Gary Maddox (source), Dave Adams (GIS)
Contact organization: Florida Department of Environmental Protection

Contact voice telephone: 850/245-8478

Spatial Data Organization Information:

*Direct spatial Rreference method: Vector

Point and vector object information:

SDTS terms description:

*Name: DEP.DRASTIC_SURFICIAL_AQUIFER
*SDTS point and vector object type: G-polygon
*Point and vector object count: 13946

ESRI terms description:

*Name: DEP.DRASTIC_SURFICIAL_AQUIFER
*ESRI feature type: Simple
*ESRI feature geometry: Polygon
*ESRI topology: FALSE
*ESRI feature count: 13946
*Spatial index: TRUE
*Linear referencing: FALSE

Spatial Reference Information:

Horizontal coordinate system definition:

Coordinate system name:

*Projected coordinate system name: Custom
*Geographic coordinate system name: GCS_North_American_1983_HARN

Planar:

Map projection:

*Map projection name: Albers Conical Equal Area
Albers conical equal area:
*Standard parallel: 24.000000: *Standard parallel: 31.500000; *Longitude of central meridian: -84.000000; *Latitude of projection origin: 24.000000; *False easting: 400000.000000; *False northing: 0.000000

Planar coordinate information:

*Planar coordinate encoding method: coordinate pair

Coordinate representation:

*Abscissa resolution: 0.000500
*Ordinate resolution: 0.000500

*Planar distance units: meters

Geodetic model:

*Horizontal datum name: North American Datum of 1983
*Ellipsoid name: Geodetic Reference System 80
*Semi-major axis: 6378137.000000
*Denominator of flattening ratio: 298.257222

Vertical coordinate system definition:

Altitude system definition:

*Altitude resolution: 1.000000
*Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates

Entity and Attribute Information:

Detailed description:

*Name: DEP.DRASTIC_SURFICIAL_AQUIFER

Entity type:

*Entity type label: DEP.DRASTIC_SURFICIAL_AQUIFER
*Entity type type: Feature Class
*Entity type count: 13946

Attribute:

Attribute label: AREA
*Attribute alias: DEP.DRASTIC_SURFICIAL_AQUIFER.AREA
*Attribute type: Double
*Attribute width: 8
*Attribute precision: 23
*Attribute scale: 5

Attribute:

*Attribute label: PERIMETER
*Attribute alias: PERIMETER
*Attribute type: Double
*Attribute width: 8
*Attribute precision: 23
*Attribute scale: 5

Attribute:

*Attribute label: SETTING
*Attribute alias: SETTING
*Attribute type: String
*Attribute width: 3
*Attribute precision: 0
*Attribute scale: 0

Attribute:

*Attribute label: DW
*Attribute alias: DW
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 2
*Attribute scale: 0

Attribute:

*Attribute label: NR
*Attribute alias: NR
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 2
*Attribute scale: 0

Attribute:

*Attribute label: AM
*Attribute alias: AM
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 2
*Attribute scale: 0

Attribute:

*Attribute label: SM
*Attribute alias: SM
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 2
*Attribute scale: 0

Attribute:

*Attribute label: T
*Attribute alias: T
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 2
*Attribute scale: 0

Attribute:

*Attribute label: IV
*Attribute alias: IV
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 2
*Attribute scale: 0

Attribute:

*Attribute label: HC
*Attribute alias: HC
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 2
*Attribute scale: 0

Attribute:

*Attribute label: DWV
*Attribute alias: DWV
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 2
*Attribute scale: 0

Attribute:

*Attribute label: NRV
*Attribute alias: NRV
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 2
*Attribute scale: 0

Attribute:

*Attribute label: AMV
*Attribute alias: AMV
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 2
*Attribute scale: 0

Attribute:

*Attribute label: SMV
*Attribute alias: SMV
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 2
*Attribute scale: 0

Attribute:

*Attribute label: TV
*Attribute alias: TV
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 2
*Attribute scale: 0

Attribute:

*Attribute label: IVV
*Attribute alias: IVV
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 2
*Attribute scale: 0

Attribute:

*Attribute label: HCV
*Attribute alias: HCV
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 2
*Attribute scale: 0

Attribute:

*Attribute label: INDEX_X
*Attribute alias: INDEX_X
*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 3
*Attribute scale: 0

Attribute:

*Attribute label: SHAPE

*Attribute alias: SHAPE

*Attribute definition:

Feature geometry.

*Attribute definition source:

ESRI

*Attribute type: Geometry

*Attribute width: 4

*Attribute precision: 0

*Attribute scale: 0

Attribute domain values:

*Unrepresentable domain:: Coordinates defining the features.

Attribute:

*Attribute label: OBJECTID
*Attribute alias: OBJECTID
*Attribute type: OID
*Attribute width: 4
*Attribute precision: 10
*Attribute scale: 0

Attribute:

*Attribute label: SHAPE.AREA
*Attribute alias: SHAPE.AREA
*Attribute type: Double
*Attribute width: 0
*Attribute precision: 0
*Attribute scale: 0

Attribute:

*Attribute label: SHAPE.LEN
*Attribute alias: SHAPE.LEN
*Attribute type: Double
*Attribute width: 0
*Attribute precision: 0
*Attribute scale: 0

Overview description:

Entity and attribute overview:

The eight mapped DRASTIC parameters and their associated weights are:  
 
  (DRASTIC parameter value X weight= weighted score)
 
Dw - depth to water  5    Dwv 
 
Nr - net recharge  4    Nrv 
 
Am - aquifer media  3   Amv 
 
Sm - soil media  2   Smv 
 
T - topography  1   Tv 
 
Iv - impact of vadose zone  5   Ivv 
 
Hc - hydraulic conductivity  3   Hcv 
 
hydrogeologic setting 
(not scored) 
 
Index = (Drv+ Nrv + Amv + Smv + Tv + Ivv + Hcv) 
 
The eighth layer, hydrogeologic setting, reflects general geomorphology and
varies nationally by region.  Florida lies within region 11, the Southeast
Coastal Plain, of the Ground water region of the United States as described by 
Heath in USGS Water Supply Paper 2242.  Four Settings predominate in region 11
and they are: 
 
	11A - Karst limestone areas ( limestone near the surface) 
  	11B - Coastal Deposits (thick clastic marine sediments) 
	11C - Swamps and Wetlands 
	11D - Beaches and Bars (sandy coastal areas and relict beach ridges)

Distribution Information:

Resource description: DRASTIC for the Surficial Aquifer

Metadata Reference Information:

*Metadata date: 20030528

*Language of metadata: en

Metadata contact:

Contact information:

Contact organization primary:

Contact person: GIS Section
Contact organization: Florida Department of Environmental Protection

Contact address:

Address type: mailing and physical address

Address:

2600 Blair Stone Rd
Twin Towers MS 6520

City: Tallahassee

State or province: FL

Postal code: 32399-2400

Contact voice telephone: 850/245-8238

*Metadata standard name: FGDC Content Standards for Digital Geospatial Metadata

*Metadata standard version: FGDC-STD-001-1998

*Metadata time convention: local time

Metadata extensions:

*Online linkage: http://www.esri.com/metadata/esriprof80.html
*Profile name: ESRI Metadata Profile

Binary Enclosures:

Enclosure:

Enclosure type: Base64
Original file name: dep.drastic_surficial_aquifer.wri
Description of enclosure: