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Jeremy D. Decker, PhD

Jeremy D. Decker is a hydrologist with the U.S Geological Survey Caribbean-Florida Water Science Center and is currently working on the development of groundwater/surface-water models to study the effects of changing climate and sea-level on coastal environments.

Dr. Decker is a hydrologist with the U.S. Geological Survey Caribbean-Florida Water Science Center located in Lutz, Florida.  He completed his B.S. and M.Eng in Mechanical Engineering at the University of Louisville and received his PhD in Mechanical Engineering from the University of Miami.  He has experience with the development of numerical models of groundwater/surface-water flow for a variety of environments.  His work has included numerical code development, data processing and parameter determination as well as future scenario development and testing involving projected climate and sea level. His most recent projects have focused on the potential effects on drainage infrastructure and the increased potential for inundation due to changing sea level and precipitation within southeastern Florida.

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Example 1 of typical canal habitat were non-native fishes occur in the Plantation/Davie area of Broward County, FL

Potential for Increased Inundation in Flood-Prone Regions of Southeast Florida in Response to Climate and Sea-Level Changes in Broward County, Florida, 2060–69

The U.S. Geological Survey, in cooperation with Broward County Environmental Planning and Resilience Division, has developed county-scale and local-scale groundwater/surface-water models to study the potential for increased inundation and flooding in eastern Broward County that are due to changes in future climate and sea-level rise. The purpose is to provide information that can be used to help...
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Caribbean-Florida Water Science Center (CFWSC)
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Potential for Increased Inundation in Flood-Prone Regions of Southeast Florida in Response to Climate and Sea-Level Changes in Broward County, Florida, 2060–69

The U.S. Geological Survey, in cooperation with Broward County Environmental Planning and Resilience Division, has developed county-scale and local-scale groundwater/surface-water models to study the potential for increased inundation and flooding in eastern Broward County that are due to changes in future climate and sea-level rise. The purpose is to provide information that can be used to help...
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Drainage infrastructure and groundwater system response to changes in sea level and precipitation, Broward County, Florida

Executive SummarySoutheast Florida is highly susceptible to flooding because of its low topography and porous, highly permeable Biscayne aquifer. Rising seas will likely result in increased groundwater levels in parts of Broward County, Florida, that will reduce available soil storage and therefore increase the likelihood of inundation and flooding from precipitation events. Moreover, rising seas
By
Caribbean-Florida Water Science Center (CFWSC)

Potential for increased inundation in flood-prone regions of southeast Florida in response to climate and sea-level changes in Broward County, Florida, 2060–69

The U.S. Geological Survey, in cooperation with Broward County Environmental Planning and Resilience Division, has developed county-scale and local-scale groundwater/surface-water models to study the potential for increased inundation and flooding in eastern Broward County that are due to changes in future climate and sea-level rise. These models were constructed by using MODFLOW 2005, with the su
Authors
Jeremy D. Decker, Joseph D. Hughes, Eric D. Swain
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Caribbean-Florida Water Science Center (CFWSC)

Hydrologic conditions and simulation of groundwater and surface water in the Great Dismal Swamp of Virginia and North Carolina

The U.S. Geological Survey (USGS), in cooperation with the U.S Fish and Wildlife Service, has investigated the hydrology of the Great Dismal Swamp (Swamp) National Wildlife Refuge (Refuge) in Virginia and North Carolina and developed a three-dimensional numerical model to simulate groundwater and surface-water hydrology. The model was developed with MODFLOW-NWT, a USGS numerical groundwater flow m
Authors
Jack R. Eggleston, Jeremy D. Decker, Jason S. Finkelstein, Frederic C. Wurster, Paul E. Misut, Luke P. Sturtevant, Gary K. Speiran
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Water Resources Mission Area, Virginia and West Virginia Water Science Center, Wildland Fire Science

Distribution of effluent injected into the Boulder Zone of the Floridan aquifer system at the North District Wastewater Treatment Plant, southeastern Florida, 1997–2011

Nonhazardous, secondarily treated, domestic wastewater (effluent) has been injected about 1 kilometer below land surface into the Boulder Zone of the Floridan aquifer system at the North District Wastewater Treatment Plant in southeastern Florida. The Boulder Zone contains saline, nonpotable water. Effluent transport out of the injection zone is a risk of underground effluent injection. At the Nor
Authors
Jeffrey N. King, Jeremy D. Decker
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Caribbean-Florida Water Science Center (CFWSC)

Utilizing dimensional analysis with observed data to determine the significance of hydrodynamic solutions in coastal hydrology

In this paper, the authors present an analysis of the magnitude of the temporal and spatial acceleration (inertial) terms in the surface-water flow equations and determine the conditions under which these inertial terms have sufficient magnitude to be required in the computations. Data from two South Florida field sites are examined and the relative magnitudes of temporal acceleration, spatial acc
Authors
Eric D. Swain, Jeremy D. Decker, Joseph D. Hughes
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Water Resources Mission Area, Caribbean-Florida Water Science Center (CFWSC)

Urban runoff (URO) process for MODFLOW 2005: simulation of sub-grid scale urban hydrologic processes in Broward County, FL

Climate change and sea-level rise could cause substantial changes in urban runoff and flooding in low-lying coast landscapes. A major challenge for local government officials and decision makers is to translate the potential global effects of climate change into actionable and cost-effective adaptation and mitigation strategies at county and municipal scales. A MODFLOW process is used to represent
Authors
Jeremy D. Decker, J.D. Hughes

Internet-based Modeling, Mapping, and Analysis for the Greater Everglades (IMMAGE; Version 1.0): web-based tools to assess the impact of sea level rise in south Florida

South Florida's Greater Everglades area is particularly vulnerable to sea level rise, due to its rich endowment of animal and plant species and its heavily populated urban areas along the coast. Rising sea levels are expected to have substantial impacts on inland flooding, the depth and extent of surge from coastal storms, the degradation of water supplies by saltwater intrusion, and the integrity
Authors
Paul Hearn, David Strong, Eric Swain, Jeremy Decker

Assessing factors affecting the thermal properties of a passive thermal refuge using three-dimensional hydrodynamic flow and transport modeling

Everglades restoration activities may cause changes to temperature and salinity stratification at the Port of the Islands (POI) marina, which could affect its suitability as a cold weather refuge for manatees. To better understand how the Picayune Strand Restoration Project (PSRP) may alter this important resource in Collier County in southwestern Florida, the USGS has developed a three-dimensiona
Authors
Jeremy D. Decker, Eric D. Swain, Bradley Stith, Catherine A. Langtimm
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Water Resources Mission Area, Caribbean-Florida Water Science Center (CFWSC)

Use of upscaled elevation and surface roughness data in two-dimensional surface water models

In this paper, we present an approach that uses a combination of cell-block- and cell-face-averaging of high-resolution cell elevation and roughness data to upscale hydraulic parameters and accurately simulate surface water flow in relatively low-resolution numerical models. The method developed allows channelized features that preferentially connect large-scale grid cells at cell interfaces to be
Authors
J.D. Hughes, J.D. Decker, C.D. Langevin
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Water Resources Mission Area, Caribbean-Florida Water Science Center (CFWSC)

Measurement-derived heat-budget approaches for simulating coastal wetland temperature with a hydrodynamic model

Numerical modeling is needed to predict environmental temperatures, which affect a number of biota in southern Florida, U.S.A., such as the West Indian manatee (Trichechus manatus), which uses thermal basins for refuge from lethal winter cold fronts. To numerically simulate heat-transport through a dynamic coastal wetland region, an algorithm was developed for the FTLOADDS coupled hydrodynamic sur
Authors
Eric Swain, Jeremy Decker
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Water Resources Mission Area, Caribbean-Florida Water Science Center (CFWSC)

Temperature inverted haloclines provide winter warm-water refugia for manatees in southwest Florida

Florida manatees (Trichechus manatus latirostris) overwintering in the Ten Thousand Islands and western Everglades have no access to power plants or major artesian springs that provide warm-water refugia in other parts of Florida. Instead, hundreds of manatees aggregate at artificial canals, basins, and natural deep water sites that act as passive thermal refugia (PTR). Monitoring at two canal sit
Authors
Bradley Stith, James P. Reid, Catherine A. Langtimm, Eric D. Swain, Terry J. Doyle, Daniel H. Slone, Jeremy D. Decker, Lars E. Soderqvist
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Water Resources Mission Area, Ecosystems Mission Area, Wetland and Aquatic Research Center , Caribbean-Florida Water Science Center (CFWSC)

Development, Testing, and Application of a Coupled Hydrodynamic Surface-Water/Groundwater Model (FTLOADDS) with Heat and Salinity Transport in the Ten Thousand Islands/Picayune Strand Restoration Project Area, Florida

A numerical model application was developed for the coastal area inland of the Ten Thousand Islands (TTI) in southwestern Florida using the Flow and Transport in a Linked Overland/Aquifer Density-Dependent System (FTLOADDS) model. This model couples a two-dimensional dynamic surface-water model with a three-dimensional groundwater model, and has been applied to several locations in southern Florid
Authors
Eric D. Swain, Jeremy D. Decker
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Water Resources Mission Area, Caribbean-Florida Water Science Center (CFWSC)

Non-USGS Publications**

Swain, E. D., Lohmann, Melinda, and Decker, J. D.,2008, Hydrologic Simulations of Water-Management Scenarios in Support of the Comprehensive Everglades Restoration Plan, In The Role of Hydrology in Water Resources Management, IAHS Red Book Series, UNESCO/IAHS Symposium, October 2008, Isle of Capri, Napoli, Italy.
Swain, E. D. and Decker, J. D., 2007, Developing a Heat-Transport Formulation for a Two-Dimensional Hydrodynamic Model of Coastal Wetlands, Second National Conference on Ecosystem Restoration, April 23-27, 2007, Kansas City Missouri p. 340.

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

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