EFDC Model Training

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EFDC Model Training

• Overview of the EFDC Model
• Model Documentation
• Model Software
• Model Files and Configuration
• Armand Bayou and Arroyo Colorado Applications
• Additional Topics

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EFDC OVERVIEW

• Development History
• Capabilities
• Hydrodynamics
• Water Quality-Eutrophication
• Sediment-Toxic Transport and Fate
• Near Field Mixing
• Previous Applications
• Water Quality Application

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ENVIRONMENTAL FLUID DYNAMICS CODE

• The EFDC Model Is a Public Domain Surface Water
  Modeling System Incorporating Fully Integrated
  Hydrodynamic, Water Quality and
  Sediment-Contaminant Simulation Capabilities
• EFDC Is Extremely Versatile and Can Be Used for
  1, 2, or 3-Dimensional Simulation of Rivers,
  Lakes, Estuaries, Coastal Regions and Wetlands
• The Single Source Code Implementation Eliminates
  the Need for Linking Multiple Models to Arrive at
  an Effective Modeling Solution

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EFDC DEVELOPMENT HISTORY

• Developed at Virginia Institute of Marine Science
  with Primary Support from State of Virginia
• Additional Support from EPA and NOAA
• Presently Maintained by Tetra Tech, Inc.
• Currently used by Federal, State and Local
  Agencies, Consultants and Universities
• US EPA Currently Supporting Development of
  EFDC-Based Surface Water Modeling Toolkit

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EFDC CAPABILITIES

• Three-Dimensional Hydrodynamics with Coupled
  Salinity and Temperature Transport
• Directly Coupled Water Quality-Eutrophication
  Model
• Directly Coupled Toxic Contaminated Sediment
  Transport and Fate Model
• Integrated Near-field Mixing Zone Model
• Preprocessing Software for Grid Generation and
  Input File Creation
• Postprocessing Software for Analysis, Graphic and
  Visualization

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EFDC HYDRODYNAMICS

• Fully Three-Dimensional with 2-D and 1-D Options
• Boundary Fitted Curvilinear Grid
• Includes Turbulence Closure Model
• Highly Efficient Semi-Implicit Solution
• Functionally Equivalent to POM/ECOM CH3D-WES and
  TRIMM

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Additional Hydro Capabilities

• 1-D Channel Network Option Using HEC Type Cross
  Section Data
• Hydraulic Control Structures
• Wave Boundary Layers and Wave Induced Currents

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EFDC WATER QUALITY-EUTROPHICATION

• Directly Coupled to Hydrodynamics
• Based on CE-QUAL-IC (Chesapeake Bay WQ Model)
  Kinetics
• 21 Water Column State Variables Including
  Multiple Classes of Algae and Organic Carbon,
  Nitrogen and Phosphorous
• Includes 27 State Variable Sediment Diagenesis
  Sub-model
• Reduced Number of State Variable Version
  Equivalent to WASP5

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EFDC WQ State Variables

• 1) cyanobacteria
• 2) diatom algae
• 3) green algae
• 4) refractory particulate organic carbon
• 5) labile particulate organic carbon
• 6) dissolved carbon
• 7) refractory part. organic phosphorus
• 8) labile particulate organic phosphorus
• 9) dissolved organic phosphorus
• 10) total phosphate
• 11) refractory part. organic nitrogen

• 12) labile part. organic nitrogen
• 13) dissolved organic nitrogen
• 14) ammonia nitrogen
• 15) nitrate nitrogen
• 16) particulate biogenic silica
• 17) dissolved available silica
• 18) chemical oxygen demand
• 19) dissolved oxygen
• 20) total active metal
• 21) fecal coliform bacteria
• 22) macroalgae

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EFDC Water Quality Schematic
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EFDC SEDIMENT DIAGENESIS MODEL

• Developed by DiToro Fitzpatrick for Chesapeake
  Bay Model
• 27 state variables and fluxes
• Three basic processes
• Depositional flux of POM from water column
• Diagenesis (decay) of POM in sediments
• Flux of substances produced by diagenesis
• Benthic sediments represented by 2 layers
• Upper layer can be oxic or anoxic
• Lower layer is always anoxic

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Sediment DiagensisModel Schematic
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EFDC SEDIMENT AND TOXICS TRANSPORT

• Multiple Size Class Cohesive and Noncohesive
  Sediment Transport
• Includes Sediment Bed Geomechanics with
  Consolidation
• Coupled with Spectral Wave Model for Wave Induced
  Resuspension
• Simulates Water Column and Bed Heavy Metal and
  Toxic Organic Compounds
• Equilibrium Partitioning and Reactions

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EFDC NEAR-FIELD MIXING

• Embedded Near-field Mixing Submodel
• Represents Outfalls as Buoyant Jets
• Capabilities Similar to CORMIX
• Updates Multiple Sources Under Varying Ambient
  Conditions
• Directly Coupled to Far Field WQ and
  Sediment-Toxics Submodels

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EFDC APPLICATIONS

• Rivers - Blackstone (MA), Ohio (WVA), Duwamish
  (WA), Christina River (DE), Yazoo River (MS),
  Housatonic (MA), Chattahoochee (GA)
• Lakes - Lake Okeechobee (FL), Conowingo (MD), Ten
  Killer (OK)
• Wetlands - South Florida Water Conservation
  Areas, Everglades Stormwater Treatment Areas
• Estuaries - Chesapeake Bay, James River (VA),
  York River (VA), Potomac River (MD), Peconic Bay
  (NY), Indian River Lagoon (FL), Puget Sound, San
  Francisco Bay, Morro Bay (CA), Mobile Bay (AL),
  Neuse River (NC), Cape Fear (NC)

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EFDC APPLICATIONS

• Coastal Regions - Atlantic Shelf (NC), Vero Beach
  (FL), Western Australian Shelf, Nan Wan Bay
  (Taiwan), Arabian Gulf, Wadden Sea (Germany), St.
  Louis Bay (MS)

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EFDC Documentation

• Hydro Theory - (Hamrick, 1992)
• Eutrophication Theory - (Park, 1995)
• Hydro Users Manual - (Hamrick, 1996)
• Short Eutro Theory - (Tt, 1998)
• Numerical Schemes - (Hamrick Wu)
• Sediment-Toxics - (Tt, 1999)

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EFDC Software

• EFDC.F - F77 Source Code
• EFDC.COM - Common Block Include File
• EFDC.PAR - Parameter Statement Include File

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EFDC Support Software

• GEFDC.F - Grid Generator
• SIEFDC.F - Spatial Initialization
• LSHS.F - Scalar Harmonic Analysis
• LSHU.F - Vector Harmonic Analysis
• BCEFDC.F - Open Boundary Condition Identification

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EFDC Support Software

• ATEFDC.F - Time Series Analysis
• PROCONH.F - Scalar Contouring and Images
• PROVELH.F - Vector Plotting

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EFDC Graphics Support

• Noesys
• MATLAB
• Tecplot
• GRADS

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Model Configuration

• Data Structure
• Input Data Files
• Examples

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EFDC Data Structure

• Spatial Variables
• A(I,J,K) -gt A(L,K)
• I pseudo x
• J pseudo y
• K stretched vertical layer
• LL(I,J) single index in horizontal

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Spatial Input Files

• cell.inp - cell type file
• celllt.inp - auxillary cell type file
• dxdy.inp - horizontal cell dimensions, depth,
  bottom elevation, roughness
• lxly.inp - horizontal cell center coordinates and
  cell orientation
• gcellmap.inp - graphics mapping file

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Creating Spatial Files

• cell.inp - conceptualization of horizontal grid
• dxdy.inp - custom, gefdc.f, or toolkit grid
  generator
• lxly.inp - same as dxdy.inp
• gcellmap.inp - gefdc.f

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Other Spatial Files

• mask. inp - inserts thin barriers
• mappgns.inp - specifies period grids along
  north-south or breaks in grid in north-south (J)
  direction
• moddxdy.inp - modifies cell dimensions orginally
  specified in dxdy.inp
• amap.inp wmap.inp - atmospheric and wind map
  files

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Initial Condition Files

• Salt.inp
• temp.inp
• dye.inp
• sedw.inp
• sndw.inp
• toxw.inp
• sedb.inp
• sndb.inp

• Toxb.inp
• wqwcrst.inp
• wqsdrst.inp
• All can be created with SIEFDC.F

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Time Series Input Files

• Aser.inp - atmos.
• Wser.inp - wind
• qser.inp - flow
• sser.inp -salt
• tser.inp - temp
• dser.inp - dye
• sdser.inp - coh sed
• snser.inp - noncoh

• Txser.inp - toxics
• cwqsr.inp - water quality variables
• wqpsl.inp - water quality sources
• Cut and Paste Creation

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Processes Files

• Qctl.inp - hydraulic control structures
• gwater.inp - groundwater interaction
• vege.inp - vegetation resistance
• wavebl.inp - wave-current boundary layers
• wavesx.inp - wave induced currents

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Run Control Files

• Efdc.inp - master input file
• wq3dwc.inp - water quality input
• wq3dsd.inp - sediment diagensis
• restart.inp - hydrodynamic restart
• wqwcrst.inp - water quality restart
• wqsdrst.inp - sediment diagensis restart file

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Model Setup

• Construct Spatial Files
• Construct Time Series Files
• Configure efdc.inp File
• Test Hydrodynamics
• Configure wq3dwc.inp and wq3dsd.inp Files
• Test Water Quality

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EFDC Output Options

• Full 3D Spatial Dump of Selected Variables at
  Specified Time Intervals
• Horizontal Plane Scalar and Vector Plotting
  Output Files
• Vertical Plane Scalar and Vector Output Files
• Time Series and Grab Sample Files

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3D Spatial Output

• Files - NAM3d.asc or NAM3d.bin
• NAM - Variable Name ie sal or uuu
• asc - ascii text file
• bin - binary file
• output can be scaled
• integer or floating point

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Horizontal Plane Graphic

• XXXconh.out - scalar contouring or image
  generation data for variable XXX
• velvech.out - vector plot data
• both file are ascii column data
• proconh.f and provelh.f process these file to
  generate sequential snapshots for importing into
  2D graphics

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Time Series Output

• XXXts.out - time series of variable XXX
• Can be directly plotted using xy plotting
  software or a spreadsheet

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EFDC SURFACE WATER MODELING TOOLKIT

• Presently Under Development
• WINDOWS Interface
• GIS Based Data Management System
• User Friendly Model Setup, Execution, and
  Simulation Evaluation
• Will Be Compatible With BASINS

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SurfGraphs

• Surface Water Modeling Graphics System
• Defines Shape File for Model Cell in Horizontal
  and Along Vertical Slices
• Model Data Output as BMD Files
• Designed for Use with CE-QUAL-W2, EFDC, and WASP