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## Primary tabs

#### Vollenweider model

Simple mass balance model for lakes, based on the Vollenweider equation:

dMw/dt = Min - sMw - Mout

The model was first used in the 1960s to determine the phosphorus concentration in lakes and reservoirs, for eutrophication assessment.
• 1 week 4 days ago

#### Mortality curve (trivial model)

This model illustrates why 100% mortality per year does not result in zero animals by the the end of the year.
It implements the trivial differential equation:
dn/dt = mn
Where :
n - number of animalst - timem - annual mortality rate
• 2 months 2 weeks ago

#### Estuarine salinity 1D model

This model implements the one-dimensional version of the advection-dispersion equation for an estuary. The equation is:

dS/dt = (1/A)d(QS)/dx - (1/A)d(EA)/dx(dS/dx) (Eq. 1)
• 1 year 3 months ago

#### Phytoplankton model URI

Simple model to illustrate an annual cycle for phytoplankton biomass in temperate waters.
Potential primary production uses Steele's equation and a Michaelis-Menten (or Monod) function for nutrient limitation. Respiratory losses are only a function of biomass.
• 1 year 3 months ago

#### Vollenweider model with primary production

Simple mass balance model for lakes, based on the Vollenweider equation:

dMw/dt = Min - sMw - Mout

The model was first used in the 1960s to determine the phosphorus concentration in lakes and reservoirs, for eutrophication assessment.
• 1 year 3 months ago

#### WOW - fish Welfare and Oxygen in Water

WOW - fish Welfare and Oxygen in Water
A simple model for oxygen balance in a salmon farm.
Development notes:
Initial DO in mg L-1 (=g m-3)

Cage volume in m3 therefore DO mass per cage is in g m-3 DO X m3 = g DO
• 1 year 9 months ago

#### Vollenweider model with diagenesis

Simple mass balance model for lakes, based on the Vollenweider equation:

dMw/dt = Min - sMw - Mout

The model was first used in the 1960s to determine the phosphorus concentration in lakes and reservoirs for eutrophication assessment.
• 1 year 9 months ago

#### Mercury pollution model with diagenesis

Simple mass balance model for lakes based on the Vollenweider equation:

dMw/dt = Min - sMw + pMs - Mout

The model was first used in the 1960s to determine the phosphorus concentration in lakes and reservoirs for eutrophication assessment.
• 1 year 10 months ago

#### CREEK - Carrying Capacity of Oysters

This model implements a very simple shellfish carrying capacity simulation for tidal creeks with freshwater input.

Physics

The model implements the one-dimensional version of the advection-dispersion equation for an estuary. The equation is:
• 2 years 2 months ago

#### Phyto 1 - PI curve for phytoplankton

Simple model to illustrate Steele's equation for primary production of phytoplankton.

The equation is:

Ppot = Pmax I/Iopt exp(1-I/Iopt)

Where:

Ppot: Potential production (e.g. d-1, or mg C m-2 d-1)
Pmax: Maximum production (same units as Ppot)
• 2 years 3 months ago

#### Estuarine salinity 1D volume model

This model implements the one-dimensional version of the advection-dispersion equation for an estuary.

It develops the basic 1D model by simulating the mass of salt rather than the concentration. This makes it straightforward to deal with multiple boxes of different volume.
• 2 years 8 months ago