Table C - 1. Water Quality (WQ) Parameter by WQ Library: Temperature Simulation Module, Nutrient Simulation Module I (NSMI), and General Constituent Simulation Module (GCSM). The Parameters are identified by the group, the name or definition, and the units. Each parameter includes the default base value (or default method selection) and theta (Ѳ). Theta (Ѳ) indicates that the parameter is a temperature-dependent coefficient (specified at 20 degrees Celsius).

WQ Library

Parameter



Base Value



Group

Name

Units

(Default) Value

Ѳ

GCSM

General Constituent 1

0-order decay rate

mg L⁻¹ day⁻¹

0.0

1.0

GCSM

General Constituent 1

1st-order decay rate

mg L⁻¹ day⁻¹

0.0

1.0

GCSM

General Constituent 1

Sediment release rate

g m⁻² day⁻¹

0.0

1.0

GCSM

General Constituent 1

Settling velocity

m day⁻¹

0.0


NSMI

Algae

Algal Biomass (Dry Weight) Stoichiometry

mg-Dry weight

100


NSMI

Algae

Algal Carbon Stoichiometry

mg-C

40


NSMI

Algae

Algal Nitrogen Stoichiometry

mg-N

7.2


NSMI

Algae

Algal Phosphorus Stoichiometry

mg-P

1.0


NSMI

Algae

Algal Chla Stoichiometry

µg-Chla

1000


NSMI

Algae

Maximum Algal Growth Rate

d⁻¹

1.0

1.047

NSMI

Algae

Algal Respiration Rate

d⁻¹

0.2

1.047

NSMI

Algae

Algal Mortality Rate

d⁻¹

0.15

1.047

NSMI

Algae

Algal Settling Velocity

m d⁻¹

0.15


NSMI

Algae

Light Limiting Constant for Algal Growth

W m⁻²

10


NSMI

Algae

Half-saturation N Limiting Constant for Algal Growth

mg-N L⁻²

0.04


NSMI

Algae

Half-saturation P Limiting Constant for Algal Growth

mg-P L⁻²

0.0012


NSMI

Algae

NH4 Preference Factor for Algal Growth


0.5


NSMI

Algae

Fraction of Algal Mortality into POC


0.9


NSMI

Algae

Ap growth


Multiplicative


NSMI

Algae

Ap light


Half & Saturation


NSMI

Benthic Algae

Benthic Algae Biomass (Dry Weight) Stoichiometry

mg-Dry weight

100


NSMI

Benthic Algae

Benthic Algae Carbon Stoichiometry

mg-C

40


NSMI

Benthic Algae

Benthic Algae Nitrogen Stoichiometry

mg-N

7.2


NSMI

Benthic Algae

Benthic Algae Phosphorus Stoichiometry

mg-P

1.0


NSMI

Benthic Algae

Benthic Algae Chla Stoichiometry

µg-Chla

5000


NSMI

Benthic Algae

Maximum Benthic Algal Growth Rate

d⁻¹

0.4

1.047

NSMI

Benthic Algae

Benthic Algae Respiration Rate

d⁻¹

0.2

1.06

NSMI

Benthic Algae

Benthic Algae Mortality Rate

d⁻¹

0.3

1.047

NSMI

Benthic Algae

Light Limiting Constant for Benthic Algae Growth

W m⁻²

10


NSMI

Benthic Algae

Half-saturation N Limiting Constant for Benthic Algae Growth

mg-N L⁻¹

0.25


NSMI

Benthic Algae

Half-saturation P Limiting Constant for Benthic Algae Growth

mg-P L⁻¹

0.125


NSMI

Benthic Algae

Half-saturation Density Constant for Benthic Algae Growth

g-Dry mass m⁻²

10


NSMI

Benthic Algae

NH4 Preference Factor for Benthic Algae Growth


0.5


NSMI

Benthic Algae

Fraction of Benthic Algae Mortality into POC


0.9


NSMI

Benthic Algae

Fraction of Bottom Area for Benthic Algae


0.9


NSMI

Benthic Algae

Fraction of Benthic Algae Mortality into Water


0.9


NSMI

Benthic Algae

Ab growth


Multiplicative


NSMI

Benthic Algae

Ab light


Half & Saturation


NSMI

Carbon Cycle

POC Hydrolysis Rate

d⁻¹

0.005

1.047

NSMI

Carbon Cycle

DOC Oxidation Rate

d⁻¹

0.01

1.047

NSMI

Carbon Cycle

Half-saturation Oxygen Attenuation Constant for DOC Oxidation

mg-O² L⁻¹

1.0


NSMI

Carbon Cycle

Fraction of CO2 in Total Inorganic Carbon


0.2


NSMI

Carbon Cycle

Partial Pressure of CO2

ppm

383


NSMI

CBOD 1

CBOD oxidation rate

d⁻¹

0.12

1.047

NSMI

CBOD 1

Half-saturation oxygen attenuation constant for CBOD oxidation

mg-O² L⁻¹

0.5


NSMI

CBOD 1

CBOD sedimentation rate

m d⁻¹

0

1.024

NSMI

Nitrogen Cycle

Organic N Hydrolysis Rate

d⁻¹

0.1

1.047

NSMI

Nitrogen Cycle

Nitrification Rate

d⁻¹

0.1

1.083

NSMI

Nitrogen Cycle

Sediment Release Rate of NH4

g-N m⁻² d⁻¹

0

1.074

NSMI

Nitrogen Cycle

Denitrification Rate

d⁻¹

0.002

1.045

NSMI

Nitrogen Cycle

Half-saturation Oxygen Attenuation Constant for Denitrification

mg-O² L⁻¹

0.1


NSMI

Nitrogen Cycle

Sediment Denitrification Velocity

m d⁻¹

0

1.08

NSMI

NSMI Global

Background Light Attenuation

m⁻¹

0.02


NSMI

NSMI Global

Organic Matter Light Attenuation

L mg⁻¹ m⁻¹

0.174


NSMI

NSMI Global

Linear Algal Light Attenuation

m⁻¹ (µg-Chla/L)⁻¹

0.0088


NSMI

NSMI Global

Nonlinear Algal Light Attenuation

m⁻¹ (µg-Chla/L)⁻⅔

0.054


NSMI

NSMI Global

Partitioning Coefficient of Inorganic P

L kg⁻¹

0


NSMI

NSMI Global

Solids Settling Velocity

m day⁻¹

1


NSMI

NSMI Global

Organic N Settling Velocity

m day⁻¹

0.01


NSMI

NSMI Global

Organic P Settling Velocity

m day⁻¹

0.01


NSMI

NSMI Global

POC Settling Velocity

m day⁻¹

0.01


NSMI

NSMI Global

Sediment Oxygen Demand

g-O² m⁻² d⁻¹

0.2

1.06

NSMI

NSMI Global

Half saturation oxygen Attenuation Constant for SOD

mg-O² L⁻¹

1


NSMI

NSMI Global

Hydraulic O2 Reaeration Rate

d⁻¹

1

1.024

NSMI

NSMI Global

Wind O2 Reaeration Velocity

m d⁻¹

0

1.024

NSMI

NSMI Global

Hydraulic O2 reaeration


User Defined


NSMI

NSMI Global

Wind O2 reaeration


User Defined


NSMI

NSMI Global

pH solution


NewtonRaphson


NSMI

Particulate Organic Matter

POM Settling Velocity

m d⁻¹

0.1


NSMI

Particulate Organic Matter

POM Dissolution Rate

d⁻¹

0.01

1.047

NSMI

Pathogen

Pathogen Death Rate

d⁻¹

0.8

1.07

NSMI

Pathogen

Light Efficiency Factor for Pathogen Decay


1


NSMI

Pathogen

Pathogen Settling Velocity

m d⁻¹

1


NSMI

Phosphorus Cycle

Organic P Hydrolysis Rate

d⁻¹

0.1

1.047

NSMI

Phosphorus Cycle

Sediment Release Rate of DIP

g-P m⁻² d⁻¹

0

1.074

Temperature

Temperature

Coefficient a in Wind Function

10⁻⁹ mb⁻¹ m s⁻¹

1


Temperature

Temperature

Coefficient b in Wind Function

10⁻⁹ mb⁻¹

1


Temperature

Temperature

Coefficient c in Wind Function


1


Temperature

Temperature

Turbulent Diffusivity Ratio


1


Temperature

Temperature

Sediment Layer Thickness

m

0.1


Temperature

Temperature

Sediment Bulk Density

kg m⁻³

1600


Temperature

Temperature

Sediment Specific Heat Capacity

J kg⁻¹ m⁻³

1674.72


Temperature

Temperature

Sediment Thermal Diffusivity

m² day⁻¹

0.0432


Temperature

Temperature

Shortwave Radiation Bed Reflectivity


0.1


Temperature

Temperature

Background Light Attenuation

m⁻¹

0.02


Temperature

Temperature

Richardson Number Function Option


Use Ri