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Statistical analysis and mapping of water levels in the Biscayne aquifer, water conservation areas, and Everglades National Park, Miami-Dade County, Florida, 2000–2009

Scientific Investigations Report 2016-5005

Prepared in cooperation with the Miami-Dade County Department of Regulatory and Economic Resources
By:
and
https://doi.org/10.3133/sir20165005

Links

  • Document: Report (3.48 MB pdf)
  • Plates:
    • Plate 1 (5.26 MB pdf) Mean of May Water Levels During the 2000–2009 Water Years, Miami-Dade County, Florida
    • Plate 2 (5.05 MB pdf) Mean of October Water Levels During the 2000–2009 Water Years, Miami-Dade County, Florida
    • Plate 3 (4.99 MB pdf) 25th Percentile of May Water Levels During the 2000–2009 Water Years, Miami-Dade County, Florida
    • Plate 4 (4.88 MB pdf) 50th Percentile of May Water Levels During the 2000–2009 Water Years, Miami-Dade County, Florida
    • Plate 5 (4.90 MB pdf) 75th Percentile of May Water Levels During the 2000–2009 Water Years, Miami-Dade County, Florida
    • Plate 6 (5.05 MB pdf) 25th Percentile of October Water Levels During the 2000–2009 Water Years, Miami-Dade County, Florida
    • Plate 7 (5.04 MB pdf) 50th Percentile of October Water Levels During the 2000–2009 Water Years, Miami-Dade County, Florida
    • Plate 8 (4.99 MB pdf) 75th Percentile of October Water Levels During the 2000–2009 Water Years, Miami-Dade County, Florida
    • Plate 9 (4.99 MB pdf) 50th Percentile of Water Levels From All Months During the 2000–2009 Water Years, Miami-Dade County, Florida
    • Plate 10 (5.02 MB pdf) 25th Percentile of Water Levels From All Months During the 2000–2009 Water Years, Miami-Dade County, Florida
    • Plate 11 (5.07 MB pdf) 5th Percentile of Water Levels From All Months During the 2000–2009 Water Years, Miami-Dade County, Florida
    • Plate 12 (4.86 MB pdf) Difference in May Mean Water Levels From the Water-year Periods 1990–99 and 2000–2009, Miami-Dade County, Florida
    • Plate 13 (4.99 MB pdf) Difference in October Mean Water Levels From the Water-year Periods 1990–99 and 2000–2009, Miami-Dade County, Florida
    • Plate 14 (5.01 MB pdf) Difference Between the 25th Percentiles of all Water Levels for Water-year Periods 1990–99 and 2000–2009, Miami-Dade County, Florida
    • Plate 15 (4.95 MB pdf) Difference Between the 50th Percentiles of all Water Levels for Water-year Periods 1990–99 and 2000–2009, Miami-Dade County, Florida
    • Plate 16 (4.95 MB pdf) Difference Between the 75th Percentiles of all Water Levels for Water-year Periods 1990–99 and 2000–2009, Miami-Dade County, Florida
  • Appendix: Figure 8-1 - (11x17) (1.35 MB pdf) Locations of all sites used to map water levels in the Biscayne aquifer, water conservation areas, and Everglades National Park, in Miami-Dade County, Florida, during the 2000-2009 water years. The same index number may be used for adjacent sites.
  • Companion File: Data, Statistics, and Geographic Information System Files, Pertaining to Mapping of Water Levels in the Biscayne Aquifer, Water Conservation Areas, and Everglades National Park, Miami-Dade County, Florida, 2000-2009 - Scientific data associated with USGS SIR 2015-5005
  • Download citation as: RIS

Abstract

Statistical analyses and maps representing mean, high, and low water-level conditions in the surface water and groundwater of Miami-Dade County were made by the U.S. Geological Survey, in cooperation with the Miami-Dade County Department of Regulatory and Economic Resources, to help inform decisions necessary for urban planning and development. Sixteen maps were created that show contours of (1) the mean of daily water levels at each site during October and May for the 2000–2009 water years; (2) the 25th, 50th, and 75th percentiles of the daily water levels at each site during October and May and for all months during 2000–2009; and (3) the differences between mean October and May water levels, as well as the differences in the percentiles of water levels for all months, between 1990–1999 and 2000–2009. The 80th, 90th, and 96th percentiles of the annual maximums of daily groundwater levels during 1974–2009 (a 35-year period) were computed to provide an indication of unusually high groundwater-level conditions. These maps and statistics provide a generalized understanding of the variations of water levels in the aquifer, rather than a survey of concurrent water levels. Water-level measurements from 473 sites in Miami-Dade County and surrounding counties were analyzed to generate statistical analyses. The monitored water levels included surface-water levels in canals and wetland areas and groundwater levels in the Biscayne aquifer.

Maps were created by importing site coordinates, summary water-level statistics, and completeness of record statistics into a geographic information system, and by interpolating between water levels at monitoring sites in the canals and water levels along the coastline. Raster surfaces were created from these data by using the triangular irregular network interpolation method. The raster surfaces were contoured by using geographic information system software. These contours were imprecise in some areas because the software could not fully evaluate the hydrology given available information; therefore, contours were manually modified where necessary. The ability to evaluate differences in water levels between 1990–1999 and 2000–2009 is limited in some areas because most of the monitoring sites did not have 80 percent complete records for one or both of these periods. The quality of the analyses was limited by (1) deficiencies in spatial coverage; (2) the combination of pre- and post-construction water levels in areas where canals, levees, retention basins, detention basins, or water-control structures were installed or removed; (3) an inability to address the potential effects of the vertical hydraulic head gradient on water levels in wells of different depths; and (4) an inability to correct for the differences between daily water-level statistics. Contours are dashed in areas where the locations of contours have been approximated because of the uncertainty caused by these limitations. Although the ability of the maps to depict differences in water levels between 1990–1999 and 2000–2009 was limited by missing data, results indicate that near the coast water levels were generally higher in May during 2000–2009 than during 1990–1999; and that inland water levels were generally lower during 2000–2009 than during 1990–1999. Generally, the 25th, 50th, and 75th percentiles of water levels from all months were also higher near the coast and lower inland during 2000–2009 than during 1990–1999. Mean October water levels during 2000–2009 were generally higher than during 1990–1999 in much of western Miami-Dade County, but were lower in a large part of eastern Miami-Dade County.

Suggested Citation

Prinos, S.T., and Dixon, J.F., 2016, Statistical analysis and mapping of water levels in the Biscayne aquifer, water conservation areas, and Everglades National Park, Miami-Dade County, Florida, 2000–2009: U.S. Geological Survey Scientific Investigations Report 2016–5005, 42 p., http://dx.doi.org/10.3133/sir20165005.

ISSN: 2328-0328 (online)

Study Area

Table of Contents

  • Abstract
  • Introduction
  • Methods of Data Analysis
  • Results of Statistical Analyses
  • Mapping Limitations
  • Summary and Conclusions
  • Acknowledgments
  • References Cited
  • Appendix 1. Analytical Considerations
  • Appendix 2. Raw Data
  • Appendix 3. Edited Data
  • Appendix 4. Percentiles of the Annual Maximums of Daily Water Levels
  • Appendix 5. Statistics of Daily Water Levels Used to Create Maps of the Water Table in Miami-Dade County, Florida
  • Appendix 6. Statistics of Daily Water Levels
  • Appendix 7. Geographic Information System Files
  • Appendix 8. Index Map of Sites Used for Analysis

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Statistical analysis and mapping of water levels in the Biscayne aquifer, water conservation areas, and Everglades National Park, Miami-Dade County, Florida, 2000–2009
Series title:
Scientific Investigations Report
Series number:
2016-5005
DOI:
10.3133/sir20165005
Year Published:
2016
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Contributing office(s):
FLWSC-Ft. Lauderdale
Description:
Report: vi, 42 p.; 16 Plates: 23.00 x 30.00 inches or smaller; Appendix; Companion File
Country:
United States
State:
Florida
County:
Miami-Dade
Online Only (Y/N):
Y
Additional Online Files (Y/N):
Y