FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
VERSION 2006
TITLE: FDEP TOTAL MAXIMUM DAILY LOADS FOR LISTED WATERS
Geodataset Name: WTRMDL Geodataset Type: SHAPE Geodataset Feature: POLYGON
GENERAL DESCRIPTION:
This dataset contains the 303(d) listed impaired waters for the State of Florida. Total Maximum Daily Loads (TMDLs) are to be created for each pollutant of concern for each water segment on the 303(d) list. A TMDL is the amount of pollutant a waterbody can receive and still meet applicable water quality standards for its designated use. The 303(d) list is derived from the 305(b) report.
DATA SOURCE(S): Florida Department of Environmental Protection SCALE OF ORIGINAL SOURCE MAPS: 1:24,000 DATE OF AUTOMATION OR SOURCE: 12/09/99 GEODATASET EXTENT: State of Florida
FEATURE ATTRIBUTE TABLES:
Datafile Name: WTRMDL.DBF ITEM NAME WIDTH TYPE PRECISION AREA 18 DECIMAL 5 PERIMETER 18 DECIMAL 5 WTRMDL_ 5 DECIMAL - WTRMDL_ID 5 DECIMAL - HUC 8 CHARACTER - BASIN 22 CHARACTER - WBID 5 CHARACTER - WQ96 7 CHARACTER - MAPID 6 DECIMAL - CLASS 1 CHARACTER - MINYR 6 DECIMAL - MAXYR 6 DECIMAL - NOBS 6 DECIMAL - STATUS 10 CHARACTER - TURB 5 CHARACTER - SD 5 CHARACTER - COLOR 5 CHARACTER - COND 5 CHARACTER - DO 5 CHARACTER - BOD 5 CHARACTER - PH 5 CHARACTER - ALK 5 CHARACTER - TSS 5 CHARACTER - TN 5 CHARACTER - TP 5 CHARACTER - TCOLI 5 CHARACTER - FCOLI 5 CHARACTER - CHLA 5 CHARACTER - COD 5 CHARACTER - TOC 5 CHARACTER - DOSAT 5 CHARACTER - WQIXX 5 CHARACTER - WQIYY 5 CHARACTER - HUC_NAME 22 CHARACTER - Z03D_LIST 24 CHARACTER - WMD 16 CHARACTER - DISTRICT 16 CHARACTER - PARAMETERS 138 CHARACTER - TMDLYEAR 19 DECIMAL 9 SPECTMDLYR 14 CHARACTER - SPECTMDLPA 25 CHARACTER - DESCRIPT 22 CHARACTER -
FEATURE ATTRIBUTE TABLES CODES AND VALUES:
item item description HUC USGS hydrologic unit code BASIN Name of WBID WBID Unique watershed identifier number WQ96 Stream condition index (SCI) for biology samples MAPID Basin ID number from 303(d) report CLADD Unknown MINYR Unknown MAXYR Unknown NOBS Unknown STATUS Unknown TURB Turbidity index value (1-100) SD Secchi disc trend (1=improve 2=stable 3=degrade) COLOR Color in platinum color units COND Conductivity (micromho) DO Dissolved Oxygen index value (1-100) BOD Biochemical Oxygen Demand index value (1-100) PH pH ALK Total Alkalinity (CaCO3mg/l) index value (1-100) TSS Total Suspended Solids index value (1-100) TN Total Nitrogen index value (1-100) TP Total Phosphorous index value (1-100) TCOLI Total Coliform index value (1-100) FCOLI Fecal Coliform index value (1-100) CHLA Chlorophyll A index value (1-100) COD Chemical Oxygen Demand index value (1-100) TOC Total Organic Carbon index value (1-100) DOSAT Percent saturation of dissolved oxygen WQIXX Water Quality index value (1-100) WQIYY Water Quality index value (1-100) HUC_NAME USGS hydrologic unit name Z03E_LIST Name of the waterbody on the 1998 303(d) list submitted to USEPA, if that name was different from the names in the 1996 305(b) report. WMD Water Management District DISTRICT DEP Regulatory District PARAMETERS Water quality parameters contributing to the impairment of the waterbody TMDLYEAR Year in which TMDLs are to be completed for waterbodies according to a consent decree containing a TMDL development schedule SPECTMDLYR Special TMDL development year. The development of a TMDL ahead of schedule. It is usually for a specific parameter. SPECTMDLPA The parameter for which the special TMDL is to be created. DESCRIPT Based on BASIN item
USER NOTES:
Section 303(d) of the Clean Water Act requires states to submit a list of impaired waterbodies for their State. The impaired waters are those that do not meet their designated use according to the 305(b) report. The 303(d) list must contain the "parameters of concern" which resulted in the impairment of the waterbody. The 1998 303(d) coverage represents the basins containing the 1998 303(d) list of impaired waterways. The 1998 303(d) list is based on information from the State's 1996 305(b) report. The Clean Water Act then requires State's to develop a Total Maximum Daily Load (TMDL) for each parameter of concern for a 303(d) listed water.
FGDL QUALITY ASSURANCE STATUS:
-Tolerances set to geoplan standards -DESCRIPT item added based on BASIN item -Shapearc, clean and regionpoly commands performed to transform original shapefile into a coverage. This resulted in the creation of polygons without any attributes. These were not a part of the original shapefile obtained from FDEP.
REFERENCES:
For more information on the 303(b) dataset and report, visit FDEP's website http://www.dep.state.fl.us/water/division/tmdl/default.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 FDEP. 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 FDEP). 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 FDEP. 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 FDEP. 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. Items CLADD, MINYR, MAXYR, NOBS and STATUS were not defined in the original FDEP metadata or in the 303(d) or 305(b) lists from the FDEP website. Contact Kimberly Shugar for further information.
MAP PROJECTION PARAMETERS
PROJECTION ALBERS DATUM HPGN UNITS METERS SPHEROID GRS1980 PARAMETERS 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 Phone: 850-921-9395 Web site: http://www.dep.state.fl.us/ Contact Person: 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