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Potentiometric Surface of the Upper Floridan Aquifer in the St. Johns River Water Management District and Vicinity, Florida, May 2007
Entry ID: USGS_OFR_2007_1371


Summary
Abstract: This map depicts the potentiometric surface of the Upper Floridan aquifer in the St. Johns River Water Management District and vicinity for May 2007. Potentiometric contours are based on water-level measurements collected at 566 wells during the period May 4-June 11 near the end of the dry season, however most of the water level data for this map were collected by the U.S. Geological Survey during the period May 21-25, 2007. Some contours are inferred from previous potentiometric-surface maps with larger well networks. The potentiometric surface of the carbonate Upper Floridan aquifer responds mainly to rainfall, and more locally, to ground-water withdrawals and spring flow. Potentiometric-surface highs generally correspond to topographic highs where the aquifer is recharged. Springs and areas of diffuse upward leakage naturally discharge water from the aquifer and are most prevalent along the St. Johns River. Areas of discharge are reflected by depressions in the potentiometric surface. Ground-water withdrawals locally have lowered the potentiometric surface. Ground water in the Upper Floridan aquifer generally flows from potentiometric highs to potentiometric lows in a direction perpendicular to the contours.

Summary of Hydrologic Conditions:

Measured values of the potentiometric surface ranged from 9 feet below NGVD29 near Fernandina Beach, Florida, to 124 feet above NGVD29 near Polk County, Florida. The average water level of the network in May 2007 was about 4 feet lower than the average in September 2006 following below-average rainfall during the dry season of 2006-07. Seasonal differences in network average water levels generally range from 4 to 6 feet. For 532 wells with previous measurements, May 2007 levels ranged from about 26 feet below to about 8 feet above September 2006 water levels. Water levels decreased 20 feet or more from September 2006 to May 2007 in 6 of the 48 wells measured in Polk County and the 2 wells measured in Hardee County. The average water level of the network in May 2007 was about 3 feet lower than the average in May 2006. For 535 wells with previous measurements, May 2007 levels ranged from about 21 feet below to about 5 feet above May 2005 water levels.

[Summary provided by the USGS.]

Related URL
Link: View Related Information
Description: Get report and data on the Potentiometric Surface of the Upper Floridan Aquifer in the St. Johns River Water Management District and Vicinity, Florida, May 2007.

Geographic Coverage
 N: 32.0 S: 26.0  E: -80.0  W: -83.0

Data Set Citation
Dataset Creator: Sandra L. Kinnaman and Joann F. Dixon
Dataset Title: Potentiometric Surface of the Upper Floridan Aquifer in the St. Johns River Water Management District and Vicinity, Florida, May 2007
Dataset Series Name: Open File Report
Dataset Release Date: 2007-01-01T00:00:00.000Z
Dataset Publisher: U.S. Geological Survey
Version: Not provided
Issue Identification: 2007-1371
Online Resource: http://pubs.usgs.gov/of/2007/1371/


Temporal Coverage
Start Date: 1970-01-01


Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > FLORIDA


Science Keywords
TERRESTRIAL HYDROSPHERE >GROUND WATER >GROUND WATER FEATURES >AQUIFERS    [Definition]
TERRESTRIAL HYDROSPHERE >GROUND WATER >GROUND WATER FEATURES >WATER TABLE    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION


Keywords
OFR
Open File Report
Aquifer
Potentiometric Surface
Wells
Water Levels


Data Set Progress
COMPLETE


Data Center
Open File Services Section, Publications Warehouse, Eastern Region, Publications, U.S. Geological Survey, U.S. Department of the Interior    [Information]
Data Center URL: http://pubs.usgs.gov/of/

Data Center Personnel
Name: ASK USGS
Phone: 1-888-275-8747
Email: ask at usgs.gov
Contact Address:
U.S. Geological Survey
12201 Sunrise Valley Drive
City: Reston
Province or State: Virginia
Postal Code: 20192
Country: USA


Personnel
SANDRA KINNAMAN
Role: INVESTIGATOR
Role: TECHNICAL CONTACT
Phone: (407) 865-7575 ext. 128
Fax: (407) 865-6733
Email: kinnaman at usgs.gov
Contact Address:
U.S. Geological Survey
224 W. Central Parkway
City: Altamonte Spring
Province or State: FL
Postal Code: 32714
Country: USA


Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2007-12-03
Last DIF Revision Date: 2018-07-02



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