SURFACE WATER QUALITY MODELS APPLIED IN THE TAMPA BAY BASIN
Model Name
(date
developed)
Agency/
Source
TBEP Watershed
loading model –
“Best estimate”
Tampa Bay
Estuary
Program
Waterbody
Applied to
Model Purpose and
Use
Tampa Bay
Empirical data used for
gaged areas. Model used
for ungaged areas to
estimate monthly and
annual average loadings of
TN as input to empirical
WQ model.
Used in both urban and
non-urban basins.
Statistical
(regression) for
hydrologic loading;
spreadsheet for TN
concentration
(1994)
TBEP Watershed
loading model –
“Model based”
Model Type
(Spreadsheet,
process model,
statistical
approach)
Tampa Bay
Estuary
Program
Tampa Bay
To estimate monthly and
annual average loadings of
TN from jurisdictions and
sub-basins for load
apportionment .
Urban & non-urban basins
Statistical
(regression) for
hydrologic loading;
spreadsheet for TN
concentration
TBEP
Tampa Bay
Estimating chlorophyll a
concentrations by bay
segment on a monthly and
annual time scale
Statistical/box model
approach that
accounts for water
and nitrogen
movement among
segments
(1994)
Tampa Bay
Empirical Model
1996
Processes
simulated,
if
applicable
N/A
2/15/2016
Scale (baywide,
bay segment,
stream or lake
segment, etc)
Basins defined by
Foose polygons in
ungaged areas.
Major basins
17 to 675 sq mi
N/A
Sub-basins in
ungaged areas:
0.05 to 101 sq mi
Basins defined by
Foose polygons.
Major basins
17 to 675 sq mi
Sub-basins:
0.05 to 101 sq mi
Bay segment
Required input
including time scale.
1
Model output
including
time scale
Model
calibrated
and
validated?
(Y/N)
Rainfall
Dryfall/Wetfall AD
USGS streamflow & WQ
Soil series and EMCs for
21 categories of land use in
ungaged basins;
Monthly avg. point source
loads in ungaged basins
Monthly average
hydrologic loads;
Monthly and
annual average
loading estimates
for TN, TP, TSS
from major basins.
Yes
Rainfall
Dryfall/Wetfall AD
Soil series and EMCs for
21 categories of land use in
all basins;
Monthly avg. point source
loads
Monthly average
hydrologic loads;
Monthly and
annual average
loading estimates
for TN, TP, TSS
for Foose
polygons subbasins.
Monthly
chlorophyll a
concentrations
Yes, in gaged
basins
1)
2)
3)
Nitrogen loading on a
monthly time scale
Salinity and
chlorophyll a
concentration data by
bay segment on a
monthly time scale
Bay bathymetric data
CWM NPS
Pollutant
Screening
SWFWMD
??????
This is an ArcView toolset used to develop a NPS
pollutant-load-surface,
evaluate potential pollutant
load levels on a subwatershed basis and
evaluate the pollutant load
reduction of various BMPs
Spreadsheet
implemented in
ArcView (Avenue
script)
N/A
Can use basins of any
size for evaluation;
however, underlying
USEPA Simple
Method Model works
best on small
individual (< 640
acre) basins
Rainfall for wet and dry
period, SWFWMD
landuse, soils, defined
basins, EMC and BMP
tables
Watershed
Management
Model (WMM)
FDEP/CDM
???
Urban and non-urban
basins
Simple Model for
nutrient and metal
loads
N/A
Small to large
WAM View
FDEP/
SWET
????
Urban and non-urban
basins
GIS based process
model for flow and
pollutant loads
Flow routing,
pollutant
attenuation
Small to large
Annual rainfall, annual
baseflow, EMCs, 12 land
use types, soil types,
pervious/impervious area
Daily rainfall, land use,
soils, topography,
hydrography including
channel morphology, point
sources
Validation-Yes
Can output on any
time scale based
on the rainfall
period used,
runoff volume,
area of calculation
cell, gross
pollution load
based on input
EMC table, net
pollution load if
BMC is used.
Annual load for
nutrients and
metals
No
Daily time series
of flows and
pollutants
Yes, in gaged
basins
Yes, in gaged
basins
SURFACE WATER QUALITY MODELS APPLIED IN THE TAMPA BAY BASIN
Model Name
(date
developed)
Agency/
Source
Waterbody
Applied to
Model Purpose and
Use
Model Type
(Spreadsheet,
process model,
statistical
approach)
Hillsborough
Co. Basins
To estimate annual and
seasonal pollutant loads for
12 parameters. Both urban
and non-urban basins
Spreadsheet model
developed for
Hillsborough County
by Parsons
N/A
17 watersheds, 0.8 sq
miles to 279 square
miles
EMCs, seasonal data,
BMPs, coverage of BMPs,
rainfall, soils, and landuse
IHM is a part of Tampa
Bay Water’s Optimizated
Regional Operations
Program used to manage
ground water production
facilities; model captures
short-term response of the
hydrologic system to
changes in stress under
dry, normal, and wet
conditions. Includes urban
and non-urban areas.
Integrated watershed
and groundwater
hydrology, simulated
with HSPF and
MODFLOW
HSPF: runoff,
infiltration,
recharge,surfac
e ET, storage.
MODFLOW:
water levels,
flow directions
and velocities
and GW-ET
HSPF: 172 basins,
320K landuse
polygons, 172 nonconnected reaches;
163 connected
reaches
MODFLOW: 1/8 to 1
mi grid cells, 150,000
river reaches, 3
aquifer levels
At present it is only a
water budget model and
cannot be used directly as a
loading model. However,
since it provides time
series of discharges to the
bay, a loading factor can
be assigned (estimated by
monitoring water quality)
to calculate loadings to the
bay (rough estimates!)
This model is an
application of
SWFWMD’s CWM model
described above.
Continuous simulation in
SWMM used to establish
runoff coefficients
Estimating chlorophyll a
and DO concentrations and
salinity in response to
discharges from Piney
Point
Spreadsheet
implemented in
ArcView
N/A
Sub-basins <1 to
1,000 acres
Rainfall, land use, soils,
basins, EMC and BMP
tables
CE-QUAL-ICM
Process model
Nutrient uptake,
algal growth
and
metabolism,
mineralization,
nitrification,
denitrification,
sediment
interactions,
grazing
Hourly estimates for
assessment
Hydrodynamic model
output, nutrient and BOD
loading, ambient initial
conditions, meteorology
Estimating chlorophyll a
and DO concentrations and
salinity in response to
discharges from TBC,
point sources, and ungaged
NPS, and atmospheric
deposition; evaluate
potential impacts due to
Downstream
Augmentation Project
CE-QUAL-ICM
Process model
Nutrient uptake,
algal growth
and
metabolism,
mineralization,
nitrification,
denitrification,
sediment
interactions,
grazing
Hourly estimates for
assessment
Hydrodynamic model
output, nutrient and BOD
loading, ambient initial
conditions, meteorology
Hillsborough
County pollutant
loading model
(Based on
SWMM??)
Hillsborough
County
Integrated
Hydrologic
Model
Tampa Bay
Water
Alafia Watershed
NPS Model
(2003)
Tampa Bay
Water
Alafia River
Watershed
Bishop Harbor
Water Quality
Model
DEP
Bishop Harbor
McKay BayPalm River
Water Quality
Model
Tampa Bay
Water
2/15/2016
McKay
Bay/Palm River
Processes
simulated,
if
applicable
Scale (baywide,
bay segment,
stream or lake
segment, etc)
Required input
including time scale.
2
Model output
including
time scale
Model
calibrated
and
validated?
(Y/N)
Seasonal, and
annual gross and
net loads for TSS,
TN, TKN,
NO3+NO2, TDP,
TP, BOD, O&G,
Cd, Pb, Zn
Time series of
surface water
discharges and
groundwater
levels, soil
moisture profiles
and various fluxes
(ET, recharge,
etc). Model extent
is about 4000 mi2,
covering most of
Tampa Bay
watershed.
Seasonal, and
annual gross and
net loads for TSS,
TN, TKN, NO3
+NO2, TDP, TP,
BOD, O&G, Cd,
Pb, Zn
Hourly
No
Hourly
Yes/Yes
Completed for
Northern TB
WUCA?
Yes, for flow
volume
Yes/Yes
SURFACE WATER QUALITY MODELS APPLIED IN THE TAMPA BAY BASIN
Model Name
(date
developed)
Model Type
(Spreadsheet,
process model,
statistical
approach)
Processes
simulated,
if
applicable
2/15/2016
Scale (baywide,
bay segment,
stream or lake
segment, etc)
Agency/
Source
Waterbody
Applied to
Model Purpose and
Use
Required input
including time scale.
Load Duration
Curve
(2004)
Florida DEP
Delaney Creek,
Blackwater
Creek
Spreadsheet Percent
Load Reduction
Analysis
Stream segment
Fecal coliform counts, total
coliform counts, stream
flow
Empirical Water
Quality Model
(2004)
Florida DEP
Thirty Mile
Creek
Spreadsheet
Regression Analysis
Stream segment
DO, temp, chl a,
NO3+NO2-N, TKN, Flow,
point source data for
discharge flow and
nutrients
Empirical Water
Quality Model
(2004)
Florida DEP
Lake Hunter
Identify loads needed to
achieve coliform bacterial
surface water criteria; used
for TMDL for coliform
bacteria
Identify total nitrogen
concentration needed to
achieve Chl. A threshold
target and DO surface
water criteria; used for
TMDL for DO and
nutrients
Identify total nitrogen and
total phosphorus loads
needed to achieve TSI
threshold target; use for
TMDL for nutrients
Spreadsheet
Regression Analyses
Watershed runoff and
whole lake analysis
EUTROMOD:
Watershed and
Lake Modeling
Procedure (1996)
SWFWMD
Lake
Thonotosassa
Spreadsheet nutrient
loading and lake
response model
Watershed runoff and
whole lake analysis
QUAL2E: the
Enhanced Stream
Water Quality
Model (1997)
Florida DEP
Ichepackesassa
Creek
Identify total nitrogen and
total phosphorus loads
needed to achieve TSI
target; TMDL and PLRG
for nutrients
Identify CBOD and
NBOD loads needed to
achieve DO surface water
criteria; used for WQBEL
for DO
Steady state
mathematical process
model
DO-BOD
Interactions
WASP: Water
Quality Analysis
Simulation
Program (2004)
EPA/Florida
DEP
Streams in
Hillsborough
River basin
Identify CBOD, nitrogen
and phosphorus loads
needed to achieve Do and
Chl a threshold targets;
used for TMDL for DO
and nutrients
Time varying
(dynamic)
mathematical process
model
WASP-EUTRO
TBEP/
SWFWMD
Tampa Bay
Simulate and quantify
relationships among
external nutrient loadings,
phytoplankton kinetics,
internal nutrient cycling
and Chl a concentrations
Time varying
(dynamic)
mathematical process
model
3
Model output
including
time scale
Model
calibrated
and
validated?
(Y/N)
Sampling event
percent load
reduction needed
to meet coliform
bacteria criteria
Monthly total
nitrogen
concentration
N/A
Chl a, NO3+NO2-N, TKN,
Ortho-P, Total P, secchi
disk depth, flow, lake
level, rainfall, land use,
EMCs, lake surface area
and mean depth
NO3+NO2-N, TKN, Total
P, stream flow, lake mean
depth, lake surface area
Annual lake
concentrations
Yes
Stream segment
DO, temp,
CBOD5/CBODu, NH3-N,
TKN, stream flow,
sediment oxygen demand,
channel cross section
dimensions, point source
data
Single event water
quality
concentrations
under critical flow
conditions
Yes/yes
DO-BOD and
nutrientsphytoplankton
interactions
Tributary streams of
Hillsborough River
DO, temp,
CBOD5/CBODu, Chl a,
NO3+NO2, NH3-N, TKN,
Ortho-P, Total P, stream
flow, sediment oxygen
demand, control structure
water level, rainfall, land
use, point source data, flow
transfer data, channel cross
section dimensions
Hourly water
quality
concentrations
Yes, calibrated
Phytoplankton
kinetics,
phosphorus &
nitrogen
cycling,
dissolved
oxygen
Main bay segments
of Tampa Bay
DO, temp, CBOD5/
CBODu, Chl a, NO3+
NO2, NH3-N, TKN,OrthoP, Total P, FW inflow,
sediment O demand,
rainfall, land use, point
source data, atmospheric
deposition, bathymetry
Hourly water
quality
concentrations
Yes, calibrated
N/A
Annual lake
concentrations
SURFACE WATER QUALITY MODELS APPLIED IN THE TAMPA BAY BASIN
Model Name
(date
developed)
Agency/
Source
Waterbody
Applied to
Model Purpose and
Use
Determine changes in
salinity associated with
operation of desalination
plant adjacent to Big Bend
Power Station
Developed as part of the
NOAA PORT System.
Hindcast, nowcast, and
forecast physical
oceanographic parameters.
POM
EPCHC/Hyd
roqual
Hillsborough
Bay
ECOM-3D
USF/Luther
Tampa Bay
EFDC
USF/Luther
Tampa Bay
EFDCHillsborough Bay
Janicki
Environment
al Inc./USF
Hillsborough
Bay
FVCOM
USF/Weisbe
rg
Tampa
Bay/Adjacent
GOM
Enhance water quality
model estimates coupled to
Luther’s circulation model
for Tampa Bay
Better predict water quality
associated with future
management scenarios
(e.g., FW diversions,
MFLs, TMDL
requirements)
Improve available bay
circulation models and
couple outputs with
regional Gulf of Mexico
circulation models
Model Type
(Spreadsheet,
process model,
statistical
approach)
2/15/2016
Processes
simulated,
if
applicable
Scale (baywide,
bay segment,
stream or lake
segment, etc)
3-d, densitydependent circulation
model
Physical
oceanographic
parameters
Hillsborough and
Middle Tampa Bay
3-d, densitydependent circulation
model
Physical
oceanographic
parameters
Baywide
3-d, hydrodynamic
3-d, hydrodynamic
3-d,
density-dependent,
finite volume coastal
ocean model
(FVCOM)
Simulate
circulation and
transport of
materials
Simulate
circulation and
transport of
materials
Baywide
Physical
oceanographic
parameters
Baywide and
adjacent Gulf of
Mexico
Hillsborough Bay
including
Hillsborough River,
TBC/McKay Bay, &
Alafia Rivers
Required input
including time scale.
Salinity, temp, tidal
velocity, sea level, FW
inputs, Wind (speed,
direction), air pressure,
bathymetry/topography
Salinity, temp, tidal
velocity, sea level, FW
inputs, Wind (speed,
direction), air pressure,
bathymetry/topography
Hourly observations
(meterological)
Constituent loads, fw
inflows, physical wq
parameters, bathymetry,
atmospheric conditions
Constituent loads, fw
inflows, physical wq
parameters, bathymetry,
atmospheric conditions
Salinity, temp, tidal
velocity, sea level, FW
inputs, Wind (speed,
direction), air pressure,
bathymetry/topography
Hourly Observations
(meteorological)
Alafia River
Hydrodynamic
Model (HSPF)
Hillsborough
River
Hydrodynamic
Model (HSPF?)
SWFWMD/
Chen
Alafia River
SWFWMD/
Chen
Hillsborough
River
Aid in the development of
Minimum Flows and
Levels
Aid in the development of
Minimum Flows and
Levels
Salinity, flow,
river level
Alafia River Channel
Salinity, flow,
river level
Hillsborough River
Channel
G:\SWFWMD Old Tampa Bay -FY2010-2011\Subject Matter Expert\TB_Known_Model_Availability.doc
4
Model output
including
time scale
Model
calibrated
and
validated?
(Y/N)
Hourly physical
oceanographic
parameters
Yes,
Calibrated and
validated?
Hourly transport
fields for water
quality
constituents
Hourly transport
fields for water
quality
constituents
Unknown
Hourly physical
oceanographic
parameters
Yes,
Calibrated and
validated?
Unknown