2019
PUB. NO.: SJ2019-1
Title:
North Florida Southeast Georgia Groundwater Model (NFSEG v1.1)
The North Florida Southeast Georgia Groundwater Model was developed through a collaborative effort among the St. Johns River Water Management District, Suwannee River Water Management District, South Florida Water Management District and stakeholders to evaluate inter-district and inter-state groundwater pumping effects. The model simulates the regional effects of pumping on groundwater levels, stream baseflows and spring flows.
PUB. NO.: SJ2019-2
Title:
Synoptic Biological Survey of 14 Spring-Run Streams in North and Central Florida: 1. Submerged Aquatic Vegetation Communities – Macrophytes
This report documents a study conducted by the St. Johns River Water Management District as part of a broader initiative to better understand, manage and restore the springs of the St. Johns River. The report presents the submerged macrophyte cover and standing crop data and analyses from the springs synoptic sampling effort.
2018
PUB. NO.: SJ2018-1
Title:
Minimum Levels Determination for Lochloosa Lake, Alachua County, Florida
This report documents the minimum levels determination for Lochloosa Lake in Alachua County, Florida.
2017
PUB. NO.: SJ2017-1
Title:
Ecology and Management of Carolina Willow (Salix caroliniana): A compendium of knowledge
The objectives of compiling this compendium of knowledge was to increase understanding of the environmental conditions that are most favorable to the establishment and persistence of Carolina willow and to provide a useful reference for managing Carolina willow with effective techniques to prevent and control its invasion into herbaceous marsh communities while minimizing undesirable off-target effects.
PUB. NO.: SJ2017-2
Title:
Minimum Flows Determination for Silver Springs, Marion County, Florida
This report describes the minimum flows for Silver Springs and the methods used to determine those flows.
PUB. NO.: SJ2017-3
Title:
Minimum Flows Determination for Alexander Springs, Lake County, Florida
This report describes the minimum flows for Alexander Springs and the methods used to determine those flows.
PUB. NO.: SJ2017-4
Title:
Determination of Minimum Flows for Silver Glen Springs, Marion and Lake Counties, Florida
This report describes the minimum flows for Silver Glen Springs and the methods used to determine those flows.
PUB. NO.: SJ2017-5
Title:
Determination of Minimum Flows for Gemini Springs, Volusia County, Florida
This report describes the minimum flows for Gemini Springs and the methods used to determine those flows.
2016
PUB. NO.: SJ2016-1
Title:
Effects on Lower St. Johns River Nutrient Supply and TMDL Target Compliance from the Restoration of a Free-Flowing Ocklawaha River
This report details the results of analyses performed by the St. Johns River Water Management District about the possible downstream effects of restoring of the lower Ocklawaha River to a free-flowing condition, using additional data and improved modeling capabilities available since an initial report was prepared in 1994.
Erratum: In October 2021, an error was detected in Figure 11 in this report. The bottom three panels of Figure 11 were erroneously duplicated from Figure 10. Figure 11 has been corrected with the appropriate panels. This correction does not affect any calculations, analyses, or conclusions in this report.
PUB. NO.: SJ2016-2
Title:
Potential Environmental Effects of Water Withdrawals from the St. Johns River — Ichthyoplankton Entrainment
This report discusses potential effects of water withdrawals on St. Johns River fish populations.
PUB. NO.: SJ2016-3
Title:
Determination of Minimum Flows for De Leon Springs, Volusia County, Florida
This report describes the district’s minimum flows and levels (MFLs) determination for De Leon Springs in Volusia County. MFLs are reviewed periodically and revised as needed under Florida Statutes. The MFL was adopted by the district governing board in December 2016.
PUB. NO.: SJ2016-4
Title:
Minimum Levels Reevaluation for Cowpen Lake, Putnam County, Florida
The original minimum flow and level for this lake was set in 1998. This report documents the reevaluation process and results. The new MFL was adopted by the district governing board in December 2016.
2015
PUB. NO.: SJ2015-1
Title:
Minimum Levels Reevaluation: Lake Melrose, Putnam County, Florida
This report describes the St. Johns River Water Management District’s minimum flows and levels (MFLs) reevaluation for Lake Melrose in Putnam County. MFLs are reviewed periodically and revised as needed under Florida Statutes. The district’s Governing Board adopted the MFL in November 2014.
2014
PUB. NO.: SJ2014-1
Title:
Minimum Levels Reevaluation: Indian Lake, Volusia County, Florida
This report describes the St. Johns River Water Management District’s minimum flows and levels (MFLs) reevaluation for Indian Lake in Volusia County. MFLs are reviewed periodically and revised as needed under Florida Statutes.
PUB. NO.: SJ2014-2
Title:
Indian Lake System Minimum Flows and Levels Hydrologic Methods Report
This report documents the task in analyzing changes to the Indian Lake hydrologic system (Indian Lake, Scoggin Lake and Coon Pond) to quantify those changes and assess their acceptability. Modeling results provide the framework needed to implement minimum flows and levels for the Indian Lake system.
2013
None.
2012
PUB. NO.: SJ2012-1
Title:
St. Johns River Water Supply Impact Study
The four-year study has tremendously advanced the science of the river, providing a body of advanced science and engineering knowledge, methodologies and analyses to evaluate future permit applications seeking water withdrawals from the river. The impact study does not authorize water withdrawals, nor does it set an absolute amount of water that can or will be withdrawn from the St. Johns River. The study was peer reviewed by the National Academy of Sciences — National Resource Council.
- Chapter 1. Executive Summary (3.3 MB)
- Chapter 2. Comprehensive Integrated Assessment (2.5 MB)
- Chapter 3. Watershed Hydrology (23.5 MB)
- Appendix 3-A. Land Use Classification/Grouping (0.1 MB)
- Appendix 3-B. HSPF Common Logic for SJRWMD (0.1 MB)
- Appendix 3-C. USJR Post-Processing of Simulated Flows and Stages (0.1 MB)
- Appendix 3-D. Evaluation of Model Uncertainty (0.1 MB)
- Appendix 3-E. Calibration and Simulation for Water Quality: Case Study (0.8 MB)
- Appendix 3-F. Climate Change Evaluation (0.5 MB)
- Appendix 3-G. St. Johns River Watershed Water Supply Impact Study Model Review by Intera (1.1 MB)
- Appendix 3-H. Explanation of Plots and Tables (0.1 MB)
- Appendix 3-I. 06-Upper St. Johns River Calibration (12.6 MB)
- Appendix 3-J. 04-Middle St. Johns River Calibration (12.7 MB)
- Appendix 3-K. 05-Lake George Calibration (1.2 MB)
- Appendix 3-L. 07-Ocklawaha River Calibration (8.4 MB)
- Appendix 3-M. 03-Lower St. Johns River Calibration (14.2 MB)
- Chapter 4. Groundwater Hydrology (5.4 MB)
- Chapter 5. River Hydrodynamics Calibration (23.4 MB)
- Chapter 6. River Hydrodynamics Results (12.0 MB)
- Chapter 7. Biogeochemistry (3.5 MB)
- Appendix 7-A. Synoptic Soil Survey Maps, Data, and Summary (1.8 MB)
- Appendix 7-B. Identification of Methods for Sample Analysis (0.1 MB)
- Appendix 7-C. Wetland Constituent Release Model (0.7 MB)
- Appendix 7-D. Wetland Constituent Reduction Model (0.1 MB)
- Appendix 7-E. Blue Cypress Soil Release Calculations and Model Simulations (0.2 MB)
- References for appendices (0.1 MB)
- Chapter 8. Plankton (3.9 MB)
- Appendix 8-A. Relationships of Water Flows with Plankton and Water Quality (0.2 MB)
- Appendix 8-B. Effect of Water Withdrawal on Phytoplankton Biomass in Lake Poinsett (1.3 MB)
- Appendix 8-C. Empirical Regression Models and Goodness-of-Fit Diagnostics (1.1 MB)
- Appendix 8-D. Ce-Qual-Icm Setup, Calibration and Withdrawal Scenario Results (2.9 MB)
- Appendix 8-E. Nitrogen and Phosphorus Concentrations, Fluxes, and Loads in the St. Johns River (0.1 MB)
- Appendix 8-F. Dominant Phytoplankton Taxa at Lake George and Racy Point and Dinoflagellate Taxa in the Lower St. Johns River (0.1 MB)
- Chapter 9. Submersed Aquatic Vegetation (1.2 MB)
- Appendix 9-A. Submerged Aquatic Vegetation Patterns in the Lower St. Johns River Basin (0.6 MB)
- Appendix 9-B. Submerged Aquatic Vegetation (SAV) in the Lower St. Johns River and the Influences of Water Quality Factors on SAV (0.3 MB)
- Appendix 9-C. Salinity-Induced Enzymatic Stress Response in Vallisneria Americana (0.9 MB)
- Appendix 9-D. Intensive Submerged Aquatic Vegetation Monitoring in the Lower St. Johns River Basin (1.0 MB)
- Appendix 9-E. Response of Vallisneria Americana Following Repeated Exposure to Different Salinity Regimes (2.6 MB)
- Appendix 9-F. Surface Salinity Partial-Duration Frequency Analyses (0.7 MB)
- Appendix 9-G. Potential for Replacement of Vallisneria Americana by Ruppia Maritima (0.6 MB)
- Appendix 9-H. Predicted Changes in Vallisneria AmericanaHabitat Suitability Indices Using Modeled Salinity and Light Conditions in the Lower St. Johns River, Florida (2.7 MB)
- Chapter 10. Wetland Vegetation (6.5 MB)
- Appendix 10-A. Description of Method for Hist-Delta and Simulated Stages at Ungauged River Transect Locations (0.3 MB)
- Appendix 10-B. Wetland and Soil Types in the Floodplain of the St. Johns River, Florida (0.3 MB)
- Appendix 10-C. Appendix 4 Estimation of Salinity in Ortega River, Florida (0.5 MB)
- Appendix 10-D. Hydroperiod Tool analysis of St. Johns River Segment 7 (6.6 MB)
- Chapter 11. Benthic Macroinvertebrates (2.9 MB)
- Appendix 11-A. Description of Benthic Communities of the St. Johns River (0.1 MB)
- Appendix 11-B. Geographic Coordinates of the Sites Sampled in the 2009 Field Study (0.1 MB)
- Appendix 11-C. Minitab Plots of Metrics Calculated from the Data of the 2009 Field Study (0.2 MB)
- Appendix 11-D. Merritt and Cummins Final Report from 2009 Field Study (2.0 MB)
- Appendix 11-E. GIS Analysis of Changes in Wetlands in Lake Poinsett Where Benthic Sampling Was Conducted in 2009 Field Study (3.2 MB)
- Appendix 11-F. Literature Review of Hydrologic and Habitat Requirements of Crayfish and Apple Snail (0.1 MB)
- Appendix 11-G. Frequency Analysis of Hydrologic and Salinity Changes Due to Withdrawals (1.0 MB)
- Appendix 11-H. Literature Review of Salinity and Freshwater Inflow Effects on Blue Crab and Penaeid Shrimp (0.2 MB)
- Chapter 12. Fish (2.1 MB)
- Appendix 12-A. Fishes of the St. Johns River System (0.2 MB)
- Appendix 12-B. Ichthyoplankton Sampling Methods (0.7 MB)
- Appendix 12-C. Potential Withdrawal Effects on Anadromous Herrings (0.1 MB)
- Appendix 12-D. Potential Withdrawal Effects on the Large Sunfishes Assemblage (0.2 MB)
- Appendix 12-E. Potential Withdrawal Effects on the Littoral Zone, Marsh and Floodplain Small Fishes Assemblage (0.3 MB)
- Appendix 12-F. Summary of Regression Analyses Relating Freshwater Inflow to Distribution, Monthly Abundance, and Annual Abundance Derived from the FIM’s Dataset 2001–2011 (0.3 MB)
- Appendix 12-G. Summary of Predicted Changes in Pseudo-Species Distribution, Monthly Abundance and Annual Abundance for Six Modeled Withdrawal Scenarios Compared to Base1995NN (0.5 MB)
- Appendix 12-H. Potential Effects of Riverine Flow Reduction on the Fisheries Oceanography of the South Atlantic Bight (0.1 MB)
- Chapter 13. Floodplain Wildlife (0.9 MB)
- Appendix 13-A. Wildlife of the St. Johns River Floodplain (0.2 MB)
- Appendix 13-B. Taxonomic Wildlife List (0.2 MB)
- Appendix 13-C. Wildlife Species of Conservation Concern for the St. Johns River Floodplain (0.2 MB)
- Appendix 13-D. Supporting Information and Glossary for the Hydrologic Wildlife Model (0.6 MB)
- Appendix 13-E. Wildlife Species and Their Hydrologic Requirements (0.5 MB)
- Appendix 13-F. Waterfowl Population Summary (0.2 MB)
PUB. NO.: SJ2012-2
Title:
Methodology for estimating historical agricultural groundwater use in the Central Florida Coordination Area (CFCA) 1957–2010
This document presents the data and methods used to estimate, allocate, and distribute historical groundwater use for spatial non-citrus agriculture (ag), citrus, and golf course uses for the Central Florida Coordination Area (CFCA) in Florida. Irrigation practices for improved pasturelands within the CFCA it is not addressed. The final data set is in feature class format (ArcGIS 9.3) with monthly time-series groundwater use data (units in average gallons of groundwater per day, by month) from 1957–2010, available from the district library.
2011
None.
2010
PUB. NO.: SJ2010-1
Title:
Pollutant load reduction goals for Newnans Lake
Presents restoration target concentrations of total nitrogen and total phosphorus for Newnans Lake, as a requirement for determining total maximum daily loads and in setting pollutant load reduction goals for the lake.
PUB. NO.: SJ2010-2
Title:
Development of a functional, best management practice program in the tri-county agricultural area of northeast Florida
Annual agricultural production in the tri-county agricultural area is concurrent with the advent of freshwater algal blooms. This report discusses recent findings and best management practices that may be effective in preventing the conveyance of sediment and nutrient-enriched agricultural runoff that drains to the receiving waters of the St. Johns River.
2009
PUB. NO.: SJ2009-1
Title:
Minimum levels reevaluation for Shaw Lake, Volusia County, FL
The report describes the district’s minimum flows and levels (MFLs) reevaluation for Shaw Lake in Volusia County, Florida.
PUB. NO.: SJ2009-2
Title:
Minimum levels reevaluation for Lake Dias, Volusia County, FL
The report outlines the district’s minimum flows and levels (MFLs) reevaluation for Lake Dias in Volusia County, Florida.
PUB. NO.: SJ2009-3
Title:
Minimum levels reevaluation: Gore Lake, Flagler County, Florida
The report describes the St. Johns River Water Management District’s minimum flows and levels reevaluation for Gore Lake in Flagler County.
PUB. NO.: SJ2009-4
Title:
Minimum levels reevaluation: Lake Ashby, Volusia County, Florida
The report describes the St. Johns River Water Management District’s minimum flows and levels reevaluation for Lake Ashby in Volusia County.
PUB. NO.: SJ2009-5
Title:
Extended abstract: Preliminary evaluation of potential weir sites for wetland conservation in Tiger Bay and Bennett Swamp,Volusia County, Florida, Phase II
Volusia County and the St. Johns River Water Management District have investigated potential weir sites in the Tiger Bay watershed for wetland mitigation and recharge potential. Phase II of the investigation, which is documented by this report, was to improve hydrologic analysis by using better topographic data, identifying other possible weir sites, and preparing preliminary designs of recommended weirs.
PUB. NO.: SJ2009-6
Title:
Deep Creek West Regional Stormwater Treatment Facility: Treatment wetland design and monitoring — tri-county agricultural area, Lower St. Johns River Basin
Water quality and hydrological monitoring stations were established throughout the treatment system to collect monthly ambient water quality data, storm event water quality data, and stage, flow, and rainfall data—to improve water quality within the tri-county watershed and assist in meeting total maximum daily load allocations. This first (2006 data) report emphasizes the design and monitoring of the treatment wetland.