Roy S. Sonenshein
2001
Levee 30 Water Level Daily Values
text files
http://sofia.usgs.gov/exchange/sonenshein/sonensheinelev.html
This data set contains daily maximum water level elevation in feet below mean sea level(feet msl) for 21 groundwater wells and daily mean stage in feet msl for 2 surface water stations for 1996 along a transect, approximately 1,000 feet long that is perpendicular to and bisected by Levee 30.
Determining the volume of water seeping from the water-conservation areas to the underlying aquifers is important in managing water levels in the conservation areas and freshwater deliveries to Everglades National Park. An accurate water budget to meet the competing natural and anthropogenic needs cannot be determined without this information. From Water Conservation Area 3B, water seeps into the Biscayne aquifer, which is about 80 feet thick directly beneath Levee 30 and thickens to the east, and flows relatively fast (due to high permeability of the aquifer) toward the urban and agricultural areas to the east. Water is also discharged to the canal along the eastern part of Levee 30. The rate of discharge is controlled by structures at the northern and southern ends of the canal. This seepage to the aquifer and canal discharge of water are critical for water-supply wells to the east and for preventing the inland movement of saltwater from the coast. However, lowering of ground-water levels to the east has resulted in higher ground-water seepage and canal discharge, reducing flows to the south in the water-conservation area. As a result, Levees 67A and 67C were constructed to direct water southward toward the central region of Everglades National Park. This water-management scheme has been effective in delivering water to the southwest; however, it reduced the flow to the southeast (northeastern part of Everglades National Park). The altering of historical flow directions and water-level durations has caused significant adverse effects to parts of the Everglades ecosystem. Water managers want to restore predevelopment flow conditions for the Everglades to survive, while also taking into consideration the urban and agricultural needs.
The objective of this project was to evaluate approaches for quantifying ground-water seepage beneath Levee 30. The accounting of all significant hydrologic inflows and outflows to the Everglades ecosystem of the south Florida mainland is a key element of the South Florida Ecosystem Program.
This project ended in 1999.
199602
199612
ground condition
none planned
-80.49
-80.48
25.86
25.86
none
groundwater
hydrology
numerical flow models
seepage
stage
surface water
water level
ISO 19115 Topic Category
environment
geoscientificInformation
inlandWaters
007
008
012
Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions, Federal Information Processing Standard (FIPS) 10-4, Washington, DC, National Institute of Standards and Technology
United States
US
U.S. Department of Commerce, 1987, Codes for the identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard 5-2): Washington, DC, NIST
Florida
FL
Department of Commerce, 1990, Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas, FIPS 6-3, Washington, DC, National Institute of Standards and Technology
Miami-Dade County
USGS Geographic Names Information System
Everglades National Park
Levee 30
none
South East Coast
Water Conservation Area 3B
WCA3B
None.
none
Roy Sonenshein
U.S. Geological Survey
mailing and physical address
3110 SW 9th Avenue
Ft. Lauderdale
FL
33315
USA
954 377-5924
sunshine@usgs.gov
http://sofia.usgs.gov/exchange/sonenshein/locationelev.html
water level parameter data location map
GIF
Station location and description, and period of record data are stored for each sampling location in the USGS NWIS database
Sonenshein, R. S.
2001
Methods to Quantify Seepage beneath Levee 30, Miami-Dade County, Florida
report
USGS Water-Resources Investigations Report
WRIR 01-4074
Tallahassee, Fl
U.S. Geological Survey
http://fl.water.usgs.gov/Abstracts/wri01_4074_sonenshein.html
not applicable
not available
Ground-water flow models were developed to calculate a water budget, including seepage losses, for a transect perpendicular to Levee 30. Twenty-one continuous recording, ground-water-level monitor wells were installed along the transect, running about 500 feet both east and west of Levee 30. The wells are located in six different clusters where each cluster has two to five wells, with depths ranging from 10 to 80 feet below land surface. Continuous surface-water-level (stage) recorders were also installed along the transect, one in Water Conservation Area 3B and one in the Levee 30 canal. Data were collected for about 1 year to obtain information for both wet- and dry-season conditions. The data were used to select boundary conditions for the ground-water flow models and to calibrate the models. Data collection began in February 1996 and ended in December 1996.
A continuous geologic core from land surface to a depth of 78 feet was obtained during the drilling of a monitor well completed in February 1995. Permeability and porosity tests were performed on 10 plugs from the core. Of particular interest was a thin, very hard, impermeable limestone layer at 7 feet below land surface with a very low porosity (less than 5 percent) and very low permeability (less than 0.001 millidarcy). This layer is believed to be areally extensive and, therefore, would constitute a semiconfining layer retarding the seepage of water from Water Conservation Area 3B into the underlying Biscayne aquifer.
Geophysical logs were obtained from two monitor wells using electro- magnetic induction and natural gamma tools. The resulting logs are useful for determining changes in rock types and water quality.
Discharge measurements were made in the Levee 30 canal under various hydrologic conditions at three locations: at the transect, 1 mile south of the transect, and 1 mile north of the transect. The differences in flow rates at these three sections are used to determine the rate at which water is seeping into or out of the canal from the aquifer, a critical input requirement for the ground-water flow models.
At two sites in the wetlands, seepage meters were used to directly measure the flux of water across the water-sediment interface. Measurements were made under varying hydrologic conditions.
2001
Roy Sonenshein
U.S. Geological Survey
mailing and physical address
3110 SW 9th Avenue
Ft. Lauderdale
FL
33315
USA
954 377-5924
sunshine@usgs.gov
Levee 30
Heather S.Henkel
U.S. Geological Survey
mailing address
600 Fourth St. South
St. Petersburg
FL
33701
USA
727 803-8747 ext 3028
727 803-2030
hhenkel@usgs.gov
Levee 30 daily values
The data have no implied or explicit guarantees
ASCII
tab-delimited text file
0.04
http://sofia.usgs.gov/exchange/sonenshein/sonensheinelev.html
Data may be downloaded from the SOFIA website.
None
20070228
Heather Henkel
U.S. Geological Survey
mailing and physical address
600 Fourth Street South
St. Petersburg
FL
33701
USA
727 803-8747 ext 3028
727 803-2030
sofia-metadata@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998