This numerical simulation explores how Zooplankton and Algae populations are impacted by a variety of factors describing the conditions of a lake. Also examined is the oxygen concentration and amount of organic carbon present within the lake.
The user is able to modify oxygen, light, temperature, wind speed, nitrogen, phosphorus, and other simulation factors to observe different scenarios.
The application also serves as an experiment with Three.JS, Flot, and running numerical simulations entirely in JavaScript.
The complete source for the application is unminified in a single file and available:
Source Code
A list of the simulation parameters has been provided below:
(Hovering over the parameter labels in the display will also show this information)
| Gmax | (day) | Max Algae Growth Rate at Optimal Light & Nutrients per Day |
| T | (C) | Temperature of Lake |
| f | CONSTANT Used in Determining Light | |
| Ke | (m^-1) | Light Extinction Coefficient |
| H | (m) | Lake Depth |
| Ia | (Ly/day) | Maximum Light Intensity per Day |
| Is | (Ly/day) | Saturating Light Intensity per Day |
| N | (µg/L) | Nitrogen Concentration |
| KmN | (µg/L) | Nitrogen Half-Saturation Constant |
| P | (µg/L) | Phosphorus Concentration |
| KmP | (µg/L) | Phosphorus Half-Saturation Constant |
| uR | Algae Endogenous Respiration CONSTANT | |
| Cg | Grazing Rate per Unit Mass of Zooplankton | |
| Dz | Death Rate of Zooplankton | |
| k | (day) | Organic Carbon Growth CONSTANT |
| rog | Complex Organic Molecule | |
| u | (m/s) | Wind Speed |
| A | (µgChl/L) | Initial Algae Population |
| Z | (mgC/L) | Initial Zooplankton Population |
| OC | (mgOC/L) | Initial Organic Carbon |
| O | (mgDO/L) | Initial Dissolved Oxygen |
| days | (day) | Days to Simulate |