Water Quality Parameters by WQ Library

Table C - 1. Water Quality (WQ) Parameter by WQ Library: Temperature Simulation Module, Nutrient Simulation Module I (NSM1), 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
NSM1	Algae	Algal Biomass (Dry Weight) Stoichiometry	mg-Dry weight	100
NSM1	Algae	Algal Carbon Stoichiometry	mg-C	40
NSM1	Algae	Algal Nitrogen Stoichiometry	mg-N	7.2
NSM1	Algae	Algal Phosphorus Stoichiometry	mg-P	1.0
NSM1	Algae	Algal Chla Stoichiometry	µg-Chla	1000
NSM1	Algae	Maximum Algal Growth Rate	d⁻¹	1.0	1.047
NSM1	Algae	Algal Respiration Rate	d⁻¹	0.2	1.047
NSM1	Algae	Algal Mortality Rate	d⁻¹	0.15	1.047
NSM1	Algae	Algal Settling Velocity	m d⁻¹	0.15
NSM1	Algae	Light Limiting Constant for Algal Growth	W m⁻²	10
NSM1	Algae	Half-saturation N Limiting Constant for Algal Growth	mg-N L⁻²	0.04
NSM1	Algae	Half-saturation P Limiting Constant for Algal Growth	mg-P L⁻²	0.0012
NSM1	Algae	NH4 Preference Factor for Algal Growth		0.5
NSM1	Algae	Fraction of Algal Mortality into POC		0.9
NSM1	Algae	Ap growth		Multiplicative
NSM1	Algae	Ap light		Half & Saturation
NSM1	Benthic Algae	Benthic Algae Biomass (Dry Weight) Stoichiometry	mg-Dry weight	100
NSM1	Benthic Algae	Benthic Algae Carbon Stoichiometry	mg-C	40
NSM1	Benthic Algae	Benthic Algae Nitrogen Stoichiometry	mg-N	7.2
NSM1	Benthic Algae	Benthic Algae Phosphorus Stoichiometry	mg-P	1.0
NSM1	Benthic Algae	Benthic Algae Chla Stoichiometry	µg-Chla	5000
NSM1	Benthic Algae	Maximum Benthic Algal Growth Rate	d⁻¹	0.4	1.047
NSM1	Benthic Algae	Benthic Algae Respiration Rate	d⁻¹	0.2	1.06
NSM1	Benthic Algae	Benthic Algae Mortality Rate	d⁻¹	0.3	1.047
NSM1	Benthic Algae	Light Limiting Constant for Benthic Algae Growth	W m⁻²	10
NSM1	Benthic Algae	Half-saturation N Limiting Constant for Benthic Algae Growth	mg-N L⁻¹	0.25
NSM1	Benthic Algae	Half-saturation P Limiting Constant for Benthic Algae Growth	mg-P L⁻¹	0.125
NSM1	Benthic Algae	Half-saturation Density Constant for Benthic Algae Growth	g-Dry mass m⁻²	10
NSM1	Benthic Algae	NH4 Preference Factor for Benthic Algae Growth		0.5
NSM1	Benthic Algae	Fraction of Benthic Algae Mortality into POC		0.9
NSM1	Benthic Algae	Fraction of Bottom Area for Benthic Algae		0.9
NSM1	Benthic Algae	Fraction of Benthic Algae Mortality into Water		0.9
NSM1	Benthic Algae	Ab growth		Multiplicative
NSM1	Benthic Algae	Ab light		Half & Saturation
NSM1	Carbon Cycle	POC Hydrolysis Rate	d⁻¹	0.005	1.047
NSM1	Carbon Cycle	DOC Oxidation Rate	d⁻¹	0.01	1.047
NSM1	Carbon Cycle	Half-saturation Oxygen Attenuation Constant for DOC Oxidation	mg-O² L⁻¹	1.0
NSM1	Carbon Cycle	Fraction of CO2 in Total Inorganic Carbon		0.2
NSM1	Carbon Cycle	Partial Pressure of CO2	ppm	383
NSM1	CBOD 1	CBOD oxidation rate	d⁻¹	0.12	1.047
NSM1	CBOD 1	Half-saturation oxygen attenuation constant for CBOD oxidation	mg-O² L⁻¹	0.5
NSM1	CBOD 1	CBOD sedimentation rate	m d⁻¹	0	1.024
NSM1	Nitrogen Cycle	Organic N Hydrolysis Rate	d⁻¹	0.1	1.047
NSM1	Nitrogen Cycle	Nitrification Rate	d⁻¹	0.1	1.083
NSM1	Nitrogen Cycle	Sediment Release Rate of NH4	g-N m⁻² d⁻¹	0	1.074
NSM1	Nitrogen Cycle	Denitrification Rate	d⁻¹	0.002	1.045
NSM1	Nitrogen Cycle	Half-saturation Oxygen Attenuation Constant for Denitrification	mg-O² L⁻¹	0.1
NSM1	Nitrogen Cycle	Sediment Denitrification Velocity	m d⁻¹	0	1.08
NSM1	NSM1 Global	Background Light Attenuation	m⁻¹	0.02
NSM1	NSM1 Global	Organic Matter Light Attenuation	L mg⁻¹ m⁻¹	0.174
NSM1	NSM1 Global	Linear Algal Light Attenuation	m⁻¹ (µg-Chla/L)⁻¹	0.0088
NSM1	NSM1 Global	Nonlinear Algal Light Attenuation	m⁻¹ (µg-Chla/L)⁻⅔	0.054
NSM1	NSM1 Global	Partitioning Coefficient of Inorganic P	L kg⁻¹	0
NSM1	NSM1 Global	Solids Settling Velocity	m day⁻¹	1
NSM1	NSM1 Global	Organic N Settling Velocity	m day⁻¹	0.01
NSM1	NSM1 Global	Organic P Settling Velocity	m day⁻¹	0.01
NSM1	NSM1 Global	POC Settling Velocity	m day⁻¹	0.01
NSM1	NSM1 Global	Sediment Oxygen Demand	g-O² m⁻² d⁻¹	0.2	1.06
NSM1	NSM1 Global	Half saturation oxygen Attenuation Constant for SOD	mg-O² L⁻¹	1
NSM1	NSM1 Global	Hydraulic O2 Reaeration Rate	d⁻¹	1	1.024
NSM1	NSM1 Global	Wind O2 Reaeration Velocity	m d⁻¹	0	1.024
NSM1	NSM1 Global	Hydraulic O2 reaeration		User Defined
NSM1	NSM1 Global	Wind O2 reaeration		User Defined
NSM1	NSM1 Global	pH solution		NewtonRaphson
NSM1	Particulate Organic Matter	POM Settling Velocity	m d⁻¹	0.1
NSM1	Particulate Organic Matter	POM Dissolution Rate	d⁻¹	0.01	1.047
NSM1	Pathogen	Pathogen Death Rate	d⁻¹	0.8	1.07
NSM1	Pathogen	Light Efficiency Factor for Pathogen Decay		1
NSM1	Pathogen	Pathogen Settling Velocity	m d⁻¹	1
NSM1	Phosphorus Cycle	Organic P Hydrolysis Rate	d⁻¹	0.1	1.047
NSM1	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