Example Data Values

Diffusion

Form of coefficient

Constant

Value

10 (or 0 if no diffusion)

Coliforms

Boundary/source values

Any values, eg 10

Day-time T₉₀:

10

Night-time T₉₀

50

Decaying Pollutants

Boundary/source values

Any values, eg 100

Day-time decay rate

0.2

Night-time decay rate

0.2

Salt

Mode

Constant

Value

10

Conservative Pollutant

Boundary or source values

Any values, eg 1000

Temperature

Mode

Constant

Value

20

Dissolved Oxygen

Reaeration

Reaeration coefficient

0.04

Temperature factor

16

BOD₅

Rate constant

0.23

Temperature coef

4.7

Slow/fast decay

0.2

Organic nitrogen

Rate constant

0.23

Temperature coef

4.7

Slow/fast decay

0.2

Ammonia oxidation

Rate constant

0.26

Temperature coef

4.7

Slow/fast decay

0.2

Nitrite-n to nitrate-n

Rate constant

1

Temperature coef

5

Sediment

Boundary or source values

100

Critical deposition stress

0.1

Fluffy bed

Critical erosion stress

0.2

Max. thickness

3

Dry density

Consolidated mud

Critical erosion stress

0.3

Max. thickness

0.001

Dry density

300

Settling velocity, fresh water

0.1

Settling velocity, saline water

0.5

Phytoplankton

Half saturation constant

nitrate-n

0.1

orthophosphate

0.014

silicate

0

Nitrogen to carbon

0.16

Phosphorus to carbon

0.024

Silicon to carbon

0.01

Maximum productivity

Gradient below Tc

0.017

Intercept below Tc

-0.025

Gradient above Tc

0.037

Intercept above Tc

-1.564

Tcrit

25

Solar radiation

100

Light extinction

0.85

Respiration

0.02

Q₁₀

2.2

Mortality rate constant

0.1

Detrital carbon

Decay constant

0.046

Temperature factor

4.7

0.001

Solar Radiation

Mode

Constant

Value

100

Adsorbed Phosphorous

Adsorption rate constant

25

Temperature factor

0

Orthophosphate/mud ratio

0.05

Half-saturation constant

0.5

Benthic Algae

Half saturation constant

nitrate-n

0.1

orthophosphate

0.014

0

Nitrogen to carbon

0.16

Phosphorus to carbon

0.024

Silicon to carbon

0

Solar radiation

100

Respiration

0.02

Q₁₀

2.2

Mortality rate constant

0.2

Macrophytes

Half saturation constant

nitrogen

0.1

orthophosphate

0.014

silicate

0

Nitrogen to carbon

0.16

Phosphorus to carbon

0.024

Silicon to carbon

0

Productivity rate

0.5

Q₁₀

2.2

Solar radiation

100

Proportion lost by

Leaching

0.1

Exudation

0.1

Seed concentration

0

Mortality rate constant

0.05

pH

Boundary or Source value

7