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Environmental Time Functions & Segment Parameters

Environmental Time Functions & Segment Parameters. Environmental Time Functions. Varies Conditions over Simulation Period Environmental properties with multiple time functions: Temperature Water velocity Light extinction Time Functions can have their own intervals. Segment Parameters.

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Environmental Time Functions & Segment Parameters

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  1. Environmental Time Functions&Segment Parameters

  2. Environmental Time Functions • Varies Conditions over Simulation Period • Environmental properties with multiple time functions: • Temperature • Water velocity • Light extinction • Time Functions can have their own intervals

  3. Segment Parameters • Varies Environmental Conditions Spatially • Scales Environmental Conditions for Individual Segments.

  4. Working Together • Segment parameters can point to individual time functions • User can specify up to 4 temperature functions. • User can specify segment temperature by point to 1 of the 4

  5. Seg 1 Temperature Function 1 Temperature Scale 1 Temperature Time Series used is 1 Temperature Function 2 Temperature Scale 1 Temperature Time Series used is 2 Seg 2

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

  7. EUTRO Module Segment Parameters • Water velocity time function pointer • Water temperature (time function pointer and multiplier) • Reaeration rate multiplier • Incoming solar radiation multiplier • Light extinction (time function pointer and multiplier) • Fraction of light intercepted by canopy (fraction) • Ammonia & phosphorus flux multipliers • Sediment oxygen demand, SOD (g/m2-day) • SOD temperature correction factor • Zooplankton

  8. Additional EUTRO Module Parameters • CBOD deoxygenation rate constant scale factors (3) • Tsivoglou reaeration escape coefficient • Dam elevation (m) • Dam pool water quality coefficient • Dam type coefficient • Fraction of bottom area covered by benthic algae

  9. SOD - EUTRO Module Parameters – (to be implemented) • Particulate Organic Nitrogen (3 types) mg N/g • Dissolved NH3 (3 types) mg N/L • NO2, mg N/L • NO3, mg N/L • Particulate Organic Phosphorus (3 types), mg P/g • Dissolved PO4, mg P/L • Particulate Organic Carbon (3 types), mg O2/g

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

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

  12. MERC Module Time Functions • Water temperature (4) (degrees C) • Normalized light intensity (photolysis option 2) • Wind speed at 10 meters (m/sec)

  13. MERC Module Segment Parameters • Water temperature (time function pointer and multiplier) • Wind speed multiplier • Dissolved organic carbon, DOC (mg/L) • Light extinction coefficient (per meter) • Oxidation rate constant (per day) • Methylation rate constant (per day) • Bacterial demethylation rate constant (per day)

  14. HEAT Module Time Functions • Cloud cover (4) (percent) • Wind speed at 10 meters (4) (m/sec) • Air temperature (4) (degrees C) • Dew point (3) (degrees C) • Light extinction coefficient (4) (per meter) • Wind sheltering function (unitless)

  15. HEAT Module Segment Parameters • Cloud cover pointer and multiplier • Wind speed pointer and multiplier • Air temperature pointer and multiplier • Dew point pointer and multiplier • Light extinction pointer and multiplier • Wind sheltering pointer and multiplier

  16. Kinetic Time Functions Steps to specify time 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

  17. Segment Properties - Parameters • Steps to specify parameters: • Press “Parameters” to enter screen • Highlight and edit parameter values for rows • Press “OK” and save

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