FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
VERSION 2003, RELEASED NOVEMBER, 2002.
FDEP WATER QUALITY DATA - LISTED WATERS
Geodataset Name: WATQUAL303D Geodataset Type: SHAPE Geodataset Feature: POLYGON
GENERAL DESCRIPTION:
This dataset consists of the 303(d) listed impaired waters for the State of Florida. The State will use this list to aid in planning for the development of Total Maximum Daily Loads (TMDLs) for each pollutant of concern for water segments on the 303(d) list. A TMDL is the amount of pollutant that a waterbody can receive and still meet applicable water quality standards and its designated use. The 303(d) list is derived from information in the 305(b) report.
DATA SOURCE(S): Florida Department of
Environmental Protection
SCALE OF ORIGINAL SOURCE MAPS: N/A
DATE OF AUTOMATION OR SOURCE: 1998
GEODATASET EXTENT: State of Florida
FEATURE ATTRIBUTE TABLES:
Datafile Name: WATQUAL303D.DBF
ITEM NAME WIDTH TYPE PRECISION AREA 19 DECIMAL - PERIMETER 19 DECIMAL - DEP305B_ID 19 DECIMAL - HUC 8 CHARACTER - BASIN 22 CHARACTER - WBID 5 CHARACTER - MAPID 6 DECIMAL - HUC_NAME 22 CHARACTER - PRIORITY 16 CHARACTER - WMD 16 CHARACTER - DISTRICT 16 CHARACTER - TMDL_YEAR 6 DECIMAL - BASINCYCLE 25 CHARACTER -
FEATURE ATTRIBUTE TABLES CODES AND VALUES:
item item description
HUC USGS hydrologic unit code
BASIN Name of basin
WBID Unique water body identifier number
Mapid Number used for labeling water body on map
Huc_name Name of USGS Hydrologic Units
Priority
WMD Water Management District
District DEP Regulatory District
Tmdl_year Year in which TMDLs are to be completed for waterbodies according
to a consent decree containing a TMDL development schedule
Basincycle Bureau of Watershed Management Basin Management Cycle year
USER NOTES: Section 305(b) of the Clean Water Act requires each state to conduct water quality surveys to determine whether
or not its waterways are healthy enough and of sufficient quality to meet their designated uses. This
information is compiled into a report called the 305(b) report. The state prepares this report every two years
for the United States Environmental Protection Agency (USEPA). USEPA then uses this report to prepare a report
to Congress, the National Water Quality Inventory, which describes the condition of the waters of the United
States. The data used for the 305(b) report comes from the USEPA STORET database, the State's biological
database (SBIO) and fish consumption advisories. This GIS coverage displays the how well each waterbody evaluated in the 305(b) report meets its designated use. There are 3 levels: meets designated use, partially
meets designated use and does not meet its designated use. The uses of most waters of the State fall into three
classes: Class I-potable water supply, Class II-shellfish harvesting, Class III-recreation and propagation of
fish and wildlife. For more information on Designated Uses refer to the State of Florida's rule 62-302
(Florida's Water Quality Standards).
FGDL QUALITY ASSURANCE STATUS:
REFERENCES:
For more information on the 305(d) dataset and report, visit FDEP's website
http://www.dep.state.fl.us/water/division/monitoring/pubs.htm
DATA LINEAGE SUMMARY:
The 1998 303(d) coverage was created from the 1996 305(b) shapefile with
modifications to the table. The WBID is the unique identifier for each of the waterbodies. The numbers under each of the water quality parameters (ex: turb)
are the annual medians that are found in the 1996 305(b) report.
Creation of the 1996 305(b) dataset
Statewide basins coverage was converted into a shapefile and subdivided into 8
smaller units by Joe Hand. Additional basins were created in ARCVIEW (For
information on the procedures and rationale used to subdivide the statewide
coverage and create these new basins, contact Joe Hand). The eight shapefiles were
used as a source for making an updated statewide 305b coverage. Each shapefile was
converted into an ARC/INFO REGIONS coverage using SHAPEARC command with the subclass
option. Coverages were projected from Decimal Degrees NAD27 to Albers-Hpgn. Topology
was rebuilt using the CLEAN command. A tolerance of 1 was used for fuzzy and dangle
length. The regions coverages were converted to ARC polygon coverages using the REGIONPOLY command. The eight polygon coverages were mapjoined using the MAPJOIN command. Sliver polygons (coverage-id = 0) were eliminated with the ELIMINATE
command. As a final check, the linework of the coverage was checked using each of
the individual eight coverages as a backcover in ARCEDIT. Some additional small
slivers were deleted manually in ARCEDIT. To assure that each polygon has a unique WBID (water body id), a summary statistics on item WBID was performed in ARCVIEW.
There were 18 duplicated WBID'S. They were reassigned unique WBID'S following the
guidelines supplied by Joe Hand. A shapefile was made of this coverage. DBASE
tables (containing summaries of chemical and biological data) from the 305b report
were joined to the attribute table of the shapefile in ARCVIEW. WBID was used as
the joinitem. For a full description of the attribute table contact Joe Hand. The shapefile with the joined attribute table was converted into an ARC/INFO polygon
coverage using SHAPEARC (with regions option), CLEAN (fuzzy and dangle length 1)
and REGIONPOLY commands. This resulted in the 1996 version of the 305(b) data.
MAP PROJECTION PARAMETERS
PROJECTION ALBERS
DATUM HPGN
UNITS METERS
SPHEROID GRS1980
1st standard parallel 24 0 0.000
2nd standard parallel 31 30 0.000
central meridian -84 00 0.000
latitude of projection's origin 24 0 0.000
false easting (meters) 400000.00000
false northing (meters) 0.00000
DATA SOURCES CONTACT(S):
Name: Florida Department of Environmental Protection
Abbr.name: FDEP
Address:
Phone: 850/921-9395
Web site: http://www.dep.state.fl.us
Contact Person: Kim Shugar
& Phone: 850/921-9395
FGDL CONTACT:
Name: Florida Geographic Data Library
Abbr. Name: FGDL
Address: Florida Geographic Data Library
431 Architecture Building
PO Box 115706
Gainesville, FL 32611-5706
Fax: (352) 846-3124
Web site: http://www.fgdl.org
Contact FGDL:
Technical Support: http://www.fgdl.org/fgdlfeed.html
FGDL Frequently Asked Questions: http://www.fgdl.org/fgdlfaq.html
FGDL Mailing Lists: http://www.fgdl.org/fgdl-l.html
For FGDL Software: http://www.fgdl.org/software.html