environmental time functions & segment parameters

Environmental Time FunctionsEnvironmental Time Functions&&

Segment ParametersSegment Parameters

Watershed & Water Quality Modeling Technical Support CenterWatershed & Water Quality Modeling Technical Support Center

Environmental Time FunctionsEnvironmental Time Functions

• Varies Conditions over Simulation PeriodVaries Conditions over Simulation Period• Environmental properties with multiple time Environmental properties with multiple time

functions:functions:– Temperature– Water velocity– Light extinction

• Time Functions can have their own intervalsTime Functions can have their own intervals


Segment ParametersSegment Parameters

• Varies Environmental Conditions SpatiallyVaries Environmental Conditions Spatially

• Scales Environmental Conditions for Scales Environmental Conditions for Individual Segments.Individual Segments.


Working TogetherWorking Together

• Segment parameters can point to Segment parameters can point to individual time functionsindividual time functions– User can specify up to 4 temperature

functions.– User can specify segment temperature by

point to 1 of the 4


0

5

10

15

20

25

30

0 5 10

Temp 1

Temp 2

Seg 1

Seg 2

Temperature Function 1Temperature Scale 1Temperature Time Series used is 1

Temperature Function 2Temperature Scale 1Temperature Time Series used is 2


EUTRO Module Time FunctionsEUTRO Module Time Functions

• Water temperature (4) (degrees C)Water temperature (4) (degrees C)• Water velocity (4) (m/sec)Water velocity (4) (m/sec)• Light intensity (langleys)Light intensity (langleys)• Fraction of daylight (fraction)Fraction of daylight (fraction)• Wind speed at 10 meters (m/sec)Wind speed at 10 meters (m/sec)• Light extinction coefficient (5) (per meter)Light extinction coefficient (5) (per meter)• Ammonia & phosphorus benthic flux (mg/m2-day)Ammonia & phosphorus benthic flux (mg/m2-day)• ZooplanktonZooplankton• Ice cover (fraction)Ice cover (fraction)• Air Temperature (degrees C)Air Temperature (degrees C)• Reaeration rate constant (per day)Reaeration rate constant (per day)


EUTRO Module Segment ParametersEUTRO Module Segment Parameters

• Water velocity time function pointerWater velocity time function pointer• Water temperature (time function pointer and multiplier)Water temperature (time function pointer and multiplier)• Reaeration rate multiplierReaeration rate multiplier• Incoming solar radiation multiplierIncoming solar radiation multiplier• Light extinction (time function pointer and multiplier)Light extinction (time function pointer and multiplier)• Fraction of light intercepted by canopy (fraction)Fraction of light intercepted by canopy (fraction)• Ammonia & phosphorus flux multipliersAmmonia & phosphorus flux multipliers• Sediment oxygen demand, SOD (g/m2-day)Sediment oxygen demand, SOD (g/m2-day)• SOD temperature correction factorSOD temperature correction factor• ZooplanktonZooplankton


Additional EUTRO Module Additional EUTRO Module Parameters Parameters

• CBOD deoxygenation rate constant scale CBOD deoxygenation rate constant scale factors (3)factors (3)

• Tsivoglou reaeration escape coefficientTsivoglou reaeration escape coefficient• Dam elevation (m)Dam elevation (m)• Dam pool water quality coefficientDam pool water quality coefficient• Dam type coefficientDam type coefficient• Fraction of bottom area covered by benthic Fraction of bottom area covered by benthic

algaealgae


SOD - EUTRO Module Parameters –SOD - EUTRO Module Parameters – (to be implemented) (to be implemented)

• Particulate Organic Nitrogen (3 types) mg N/gParticulate Organic Nitrogen (3 types) mg N/g

• Dissolved NHDissolved NH33 (3 types) mg N/L (3 types) mg N/L

• NONO22, mg N/L, mg N/L

• NONO33, mg N/L, mg N/L

• Particulate Organic Phosphorus (3 types), mg P/gParticulate Organic Phosphorus (3 types), mg P/g

• Dissolved PODissolved PO44, mg P/L, mg P/L

• Particulate Organic Carbon (3 types), mg OParticulate Organic Carbon (3 types), mg O22/g/g


TOXI Module Time FunctionsTOXI Module Time Functions

• Water temperature (4) (degrees C)Water temperature (4) (degrees C)• Water velocity (4) (m/sec)Water velocity (4) (m/sec)• pH of water column & benthic segmentspH of water column & benthic segments• Normalized light intensity (photolysis option 2)Normalized light intensity (photolysis option 2)• Wind speed at 10 meters (m/sec)Wind speed at 10 meters (m/sec)• Bacteria population (Water & Benthos)Bacteria population (Water & Benthos)• Air temperature (degrees C)Air temperature (degrees C)• Reaeration rate constant (per day)Reaeration rate constant (per day)• Chlorophyll-a (mg/L)Chlorophyll-a (mg/L)


TOXI Module Segment ParametersTOXI Module Segment Parameters

• Water velocity time function pointerWater velocity time function pointer• Water temperature (time function pointer and multiplier)Water temperature (time function pointer and multiplier)• Wind speed multiplierWind speed multiplier• Reaeration rate multiplierReaeration rate multiplier• Dissolved organic carbon, DOC (mg/L)Dissolved organic carbon, DOC (mg/L)• Fraction organic carbon for solids 1, 2, 3 (fraction)Fraction organic carbon for solids 1, 2, 3 (fraction)• Chlorophyll a concentration (mg/L)Chlorophyll a concentration (mg/L)• pHpH• Light extinction coefficient (per meter)Light extinction coefficient (per meter)• Oxidative radical concentration (moles/L)Oxidative radical concentration (moles/L)• Bacteria Population (cells/100 mL)Bacteria Population (cells/100 mL)• Extra environmental propertyExtra environmental property• Overall decay rate constant for chemicals 1, 2, 3 (per day)Overall decay rate constant for chemicals 1, 2, 3 (per day)


MERC Module Time FunctionsMERC Module Time Functions

• Water temperature (4) (degrees C)Water temperature (4) (degrees C)

• Normalized light intensity (photolysis Normalized light intensity (photolysis option 2)option 2)

• Wind speed at 10 meters (m/sec)Wind speed at 10 meters (m/sec)


MERC Module Segment ParametersMERC Module Segment Parameters

• Water temperature (time function pointer and Water temperature (time function pointer and multiplier)multiplier)

• Wind speed multiplierWind speed multiplier• Dissolved organic carbon, DOC (mg/L)Dissolved organic carbon, DOC (mg/L)• Light extinction coefficient (per meter)Light extinction coefficient (per meter)• Oxidation rate constant (per day)Oxidation rate constant (per day)• Methylation rate constant (per day)Methylation rate constant (per day)• Bacterial demethylation rate constant (per day)Bacterial demethylation rate constant (per day)


HEAT Module Time FunctionsHEAT Module Time Functions

• Cloud cover (4) (percent)Cloud cover (4) (percent)

• Wind speed at 10 meters (4) (m/sec)Wind speed at 10 meters (4) (m/sec)

• Air temperature (4) (degrees C)Air temperature (4) (degrees C)

• Dew point (3) (degrees C)Dew point (3) (degrees C)

• Light extinction coefficient (4) (per meter)Light extinction coefficient (4) (per meter)

• Wind sheltering function (unitless)Wind sheltering function (unitless)


HEAT Module Segment HEAT Module Segment ParametersParameters

• Cloud cover pointer and multiplierCloud cover pointer and multiplier

• Wind speed pointer and multiplierWind speed pointer and multiplier

• Air temperature pointer and multiplierAir temperature pointer and multiplier

• Dew point pointer and multiplierDew point pointer and multiplier

• Light extinction pointer and multiplierLight extinction pointer and multiplier

• Wind sheltering pointer and multiplierWind sheltering pointer and multiplier


Kinetic Time FunctionsKinetic Time Functions

Steps to specify time Steps to specify time functions:functions:

• Point and click on “Used” field to select or de-select time functions

• Highlight Time Function• In bottom window, fill in time

function values for beginning and ending times

• As needed, add time rows by

pressing “+ Insert” and edit Date, Time, and Value

• Continue selecting time functions and entering data

• Press “OK” and save


Segment Properties - ParametersSegment Properties - Parameters

• Steps to specify parameters:Steps to specify parameters:• Press “Parameters” to enter screen

• Highlight and edit parameter values for rows• Press “OK” and save

environmental time functions & segment parameters

Documents

temperature functions

temperature time series

segment temperature

temperature scale

degrees c water velocity

degrees cwater temperature

multiple time functions

individual time functions