St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District
St. Johns River Water Management District - www.sjrwmd.com

www.sjrwmd.com

Publications and videos

Professional papers
1994 to 2014

Downloading or ordering published reports

Downloading some files from this page may take a long time with slower Internet connections, such as dial‑up. Look for the CD icon near files that are larger than 50 MB in size. Clicking this icon will take you to an order form to request the desired publication, which will be sent to you on CD-ROM at no charge.

To download any file, right click on the PDF icon of the desired document and select “Save Target As…” (or “Save Link As…”). Click “Save” in the next window to begin the download.

2014

PUB. NO.: SJ2014-PP1

By: Douglas Munch, P.G.

Title:
Groundwater Withdrawals for Public Supply Use in the Central Florida Coordination Area (CFCA) and Vicinity, 1945–2010

The data presented in this paper are from a variety of sources and were used to develop historical estimates and reported quantities of public supply utility groundwater withdrawals during the period 1945 to 2010 in the central Florida region.

PUB. NO.: SJ2014-PP2

By: Douglas Munch, Jeffrey Davis, James Lemine and David Toth

Title:
Source of Water Discharged from Green Cove Spring, Clay County, Florida

An investigation by the St. Johns River Water Management District was undertaken to determine the source of the water that discharges from Green Cove Spring in Clay County, Florida.

2013

None.

2012

None.

2011

PUB. NO.: SJ2011-PP1

By: W.L. Osburn, P.G.

Title:
Evaluation of discharge data for Blue Spring, Volusia County, Florida, for the period 1932–2006

St. Johns River Water Management District established minimum flows and levels (MFLs) for Blue Spring, Volusia County, in 2006 as a minimum flow regime (MFR). An evaluation of available spring discharge data, for the period March 1932 to June 2006, was conducted, the summary of which is presented here. This paper finalizes the draft information presented in an earlier report, SJ2007-SP17: Analysis of Blue Spring discharge data to determine a minimum flow regime.

2010

None.

2009

PUB. NO.: SJ2009-PP1

By: Robert A. Mattson

Title:
Relationships between benthic algae and benthic macroinvertebrate communities in Florida spring-run streams

Existing data from published studies of benthic algae and macroinvertebrates were analyzed to evaluate the existence of relationships of how changes in algal communities may affect the fauna of springs and spring-run streams.

PUB. NO.: SJ2009-PP2

By: Dean R. Dobberfuhl, Ph.D. and Courtney E. Hart

Title:
Distribution of submerged aquatic vegetation in the Lower St. Johns River: 2006 Atlas

This atlas contains Lower St. Johns River Basin submerged aquatic vegetation (SAV) data for 2006. Ground-truthing transects and ground-truthing polygons from field-collected data were mapped and assessed, and hyperspectral imagery was collected and analyzed.

2008

None.

2007

PUB. NO.: SJ2007-PP1

By: R.A. Mattson, M. Lehmensick, E.F. Lowe

Title:
Nitrate toxicity in Florida springs and spring-run streams: A review of the literature and its implications

Human activity has increased the amounts of nitrogen going into surface waters and groundwater in the last century. This report documents the emerging body of research data that suggests that there are toxic effects of nitrogen enrichment on aquatic fauna.

2006

PUB. NO.: SJ2006-PP1

By: P. Kinser, M. Minno, S. Brown and C. Denizman

Title:
Estimating the likelihood of harm to lakes from groundwater withdrawals in the St. Johns River Water Management District for the year 2025

A geographic information systems-based model was developed to predict the likelihood of harm to lakes in the St. Johns River Water Management District from future groundwater withdrawals. Six spatial data layers were combined to produce a map of lake susceptibility to groundwater withdrawals.

PUB. NO.: SJ2006-PP2

By: D. Dobberfuhl, J. White, K. Cayse, and J. Jaeger

Title:
Littoral sediment characteristics: Comparisons with channel sediments and association with submerged vegetation cover

Sediment samples were taken to characterize littoral sediments, compare littoral sediments to pelagic sediments and explore associations among submersed aquatic vegetation and sediment quality.

PUB. NO.: SJ2006-PP3

By: D. Dobberfuhl and C. Hart

Title:
Distribution of submerged aquatic vegetation in the lower St. Johns River: 2004 Atlas

Mapping of submerged aquatic vegetation began in 1995 to evaluate the quality and distribution of estuarine and freshwater submerged habitats. The ongoing effort is designed to quantify ecosystem change in response to restoration efforts and to provide information necessary for the development of pollutant load reduction goals and total maximum daily loads.

2005

None.

2004

None.

2003

PUB. NO.: SJ2003-PP1

By: D. Dobberfuhl and N. Trahan

Title:
Distribution of submerged aquatic vegetation in the lower St. Johns River: 2001 atlas

This atlas shows results of submerged aquatic vegetation (SAV) monitoring for 2001. Two methods were used to monitor SAV: (1) aerial photography followed by interpretation and (2) groundtruthing transects.

PUB. NO.: SJ2003-PP2

By: A. Steinmetz, M. Jeansonne, E. Gordon, and J. Burns, Jr.

Title:
An evaluation of glass prisms in boat docks to reduce shading of submersed aquatic vegetation in the lower St. Johns River, Florida

The effectiveness of glass prisms in boat docks was assessed to determine if shading impacts to submersed aquatic vegetation (SAV) were reduced. Six experimental docks with and without prisms were constructed in the lower St. Johns River. SAV percent coverage, canopy height, and photosynthetically active radiation were monitored under each dock and in an adjacent control area with no docks.

PUB. NO.: SJ2003-PP3

By: P. Kinser, M. Minno, P.Burger, and S. Brown

Title:
Modification of modeling criteria for application in the 2025 assessment of likelihood of harm to native vegetation

Since 1995, a geographic information system model has been used to define areas of the St. Johns River Water Management District where wetlands vegetation is likely to be harmed from future groundwater withdrawals for agriculture, industry, and public water supply. For the 2025 likelihood of harm assessment, a set of detailed constraints was generalized to create a new drawdown scale. This revised scale, in conjunction with drawdown estimations for 2025, was tested in the likelihood of harm model for the east-central Florida area.

2002

PUB. NO.: SJ2002-PP1

By: D. Dobberfuhl

Title:
Distribution of submerged aquatic vegetation in the lower St. Johns River: 1998 atlas

Submerged aquatic vegetation (SAV) is an important food source and habitat for many organisms. This report compares three methods that were used to survey SAV distribution in the lower St. Johns River, Crescent Lake, Lake George, and Doctors Lake. Included are 37 aerial photographs.

2001

PUB. NO.: SJ2001-PP1

By: D. Toth

Title:
Projected 2020 aquifer drawdowns at the city of St. Augustine wellfield, St. Johns County, Florida

Two analytical models were used to simulate changes in the water table and the potentiometric surfaces of the surficial aquifer system and the Upper Floridan aquifer, based on 2010, 2015, and 2020 projected pumpages at the city of St. Augustine wellfield as a part of the water supply assessment performed by the St. Johns River Water Management District.

PUB. NO.: SJ2001-PP2

By: D. Toth

Title:
Projected 2020 aquifer drawdowns at the Tillman wellfield, St. Johns County, Florida

Two analytical models were used to simulate changes in the water table and the potentiometric surfaces of the surficial aquifer system and the Upper Floridan aquifer, based on 2020 projected pumpages at the Tillman wellfield as a part of the water supply assessment performed by the St. Johns River Water Management District.

PUB. NO.: SJ2001-PP3

By: D. Toth

Title:
Projected 2020 aquifer drawdowns at the city of Vero Beach and Indian River County wellfields

As part of requirements under Florida law, this report is part of a water supply assessment used to simulate changes in the water table and the potentiometric surfaces of the surficial aquifer system and the Upper Floridan aquifer, based on 2010, 2015, and 2020 projected pumpages at the city of Vero Beach and Indian River County wellfields.

2000

PUB. NO.: SJ2000-PP1

By: D. Durden

Title:
Approximation of relative contributions of various entities to the overall drawdown in the Upper Floridan aquifer of the potato-growing region in St. Johns and Putnam counties, Florida

This report shows how an analytical groundwater flow model was used to estimate the relative contributions of various water users to drawdowns in the potentimetric surface of the Upper Floridan aquifer of east Putnam and southwest St. Johns counties during the potato irrigation season (March 1-May 1).

1999

None.

1998

PUB. NO.: SJ98-PP1

By: M. Sterling and C. Padera

Title:
The Upper St. Johns River Basin Project: The environmental transformation of a public flood control project

Once a conventional and highly structured flood control project, the Upper St. Johns River Basin Project was transformed in the 1980s into a national model of modern floodplain management. This report shows how the current project is designed to balance the multiple uses of the St. Johns River and to provide for major environmental habitat restoration and water quality protection benefits while maintaining its primary mission of flood control.

1997

PUB. NO.: SJ97-PP1

By: P. Kinser, M. Lee, G. Dambek, M. Williams, K. Ponzio, and C. Adamus

Title:
Expansion of willow in the Blue Cypress Marsh Conservation Area, Upper St. Johns River Basin

Expansion of coastal plain willow was investigated in a relatively unimpacted, 8,400-acre area. Two remote-sensing approaches using color infrared aerial photographs were used to quantify the pattern and the rate of spread of willow.

1996

PUB. NO.: SJ96-PP1

By: C. Huang

Title:
Projected aquifer drawdowns, Palm Coast Utility Corporation wellfields, Flagler County, Florida

Three linear analytical groundwater models, DRAWDOWN, MLTLAY, and SURFDOWN, were used in this study. The DRAWDOWN model calculated changes in the potentiometric surfaces of the water table in the surficial aquifer system and of the intermediate aquifer system, based on 1988 pumpage values and 2010 projected pumpages at the southwest wellfield of Palm Coast Utility Corp. The MLTLAY model calculated changes in the potentiometric surfaces of the intermediate aquifer system and the Floridan aquifer system, based on 1993 pumpage values and 2010 projected pumpages at the "LW" wellfield. The SURFDOWN model calculated the drawdown of the water table in the surficial aquifer system for the "LW" wellfield.

1995

PUB. NO.: SJ95-PP1

By: P. Fischl and G. Szell

Title:
Projected aquifer drawdowns, city of Leesburg wellfields, Lake County, Florida

Two linear analytical groundwater models, MLTLAY and DRAWDOWN, were used to simulate changes in the potentiometric surface of the surficial aquifer and Floridan aquifer systems, based on 1988 pumpage values and 2010 projected pumpages for the city of Leesburg.

PUB. NO.: SJ95-PP2

By: D. Toth

Title:
Water quality in the Floridan aquifer system, Crescent City Ridge, northeast Florida

Groundwater samples taken from 187 wells were used to determine concentrations of chloride, sulfate, and total dissolved solids in the Floridan aquifer system in the Crescent City Ridge area.

PUB. NO.: SJ95-PP3

By: P. Fischl

Title:
Predicting areas of future public water supply problems: A geographic information system approach

A geographic information system methodology was developed to ensure the adequate placement of the locations of current groundwater flow models used by the St. Johns River Water Management District and to delineate areas where new analyses should be performed.

1994

PUB. NO.: SJ94-PP1

By: P. Fischl

Title:
Projected aquifer drawdowns, city of Ocala wellfield, Marion County, Florida

A linear analytical groundwater model, DRAWDOWN, was used to simulate changes in the potentiometric surface of the Upper Floridan aquifer, based on 2010 projected pumpages at the city of Ocala wellfield. The model calculates the drawdown in a two-layered, coupled, leaky-artesian aquifer.

PUB. NO.: SJ94-PP2

By: P. Fischl

Title:
Projected aquifer drawdowns, Murphree wellfield, Gainesville Regional Utilities, Alachua County, Florida

A linear analytical groundwater model, DRAWDOWN, was used to simulate changes in the potentiometric surface of the Upper Floridan aquifer, based on 2010 projected pumpages at the Murphree wellfield.

PUB. NO.: SJ94-PP3

By: C. Huang

Title:
Revised spring conductance coefficients, Wekiva River Basin groundwater flow model

A numerical groundwater flow model for the Wekiva River Basin is used to predict groundwater levels and associated spring discharges within the basin. Spring discharge rates are totally dependent on spring conductance coefficients and head differences between the elevations of the potentiometric surface of the Floridan aquifer system and the pool elevations at the spring sites.

PUB. NO.: SJ94-PP4

By: D. Toth

Title:
Projected aquifer drawdowns, Tillman Ridge wellfield, St. Johns County, Florida

Two analytical models, MLTLAY and SURFDOWN, were used to simulate changes in the water table and the potentiometric surfaces of the surficial aquifer system and the Upper Floridan aquifer between 1988 and 2010 at the Tillman Ridge wellfield.

PUB. NO.: SJ94-PP5

By: D. Toth

Title:
Projected aquifer drawdowns, city of St. Augustine wellfield, St. Johns County, Florida

Two analytical models, MLTLAY and SURFDOWN, were used to simulate changes in the water table and the potentiometric surfaces of the surficial aquifer system and the Upper Floridan aquifer, based on 2010 projected pumpages at the city of St. Augustine wellfield.

PUB. NO.: SJ94-PP6

By: D. Toth

Title:
Projected aquifer drawdowns, City of Vero Beach and Indian River County wellfields, Indian River County, Florida

An analytical model, MLTLAY, was used to simulate changes in the potentiometric surfaces of the surficial aquifer system and the Floridan aquifer system, based on 2010 projected pumpages at the city of Vero Beach and Indian River County wellfields.

PUB. NO.: SJ94-PP7

By: D. Toth

Title:
Projected aquifer drawdowns, Palm Bay Utility Corporation wellfield, Brevard County, Florida

Two analytical models, MLTLAY and SURFDOWN, were used to simulate changes in the water table and the potentiometric surfaces of the surficial aquifer system and the Upper Floridan aquifer, based on 2010 projected pumpages at the Palm Bay Utility Corp. wellfield.

Careers

In this section
Highlights
More about
Careers

Search www.sjrwmd.com

Governing Board meetings
Please see agendas for specific meeting times, which may differ monthly.

Lobbyist registration requirements

Other district meetings and notices

Central Florida Water Initiative

Tell us how
we are doing.

Take our survey on
customer service.

By accessing this site, you agree to accept terms and conditions of the district’s liability disclaimer.

Employee Portal

St. Johns River Water Management District
4049 Reid Street, Palatka, FL 32177
(800) 725-5922