Table 1 Parameters, symbols and units used in the model
From: Developing a system dynamics model for prediction of phosphorus in facultative stabilization ponds
Variable name | Symbol | Unit |
|---|---|---|
Algae | A | mgChl-a/m3 |
Ratio of phosphorus to carbon | Apc | mgPgC−1 |
Ratio of phosphorus to chlorophyll | Apa | mgPchla |
Solar radiation | I | Lyd−1 |
Volume | V | m3 |
Combined decline of respiration and excretion | kra | d−1 |
Half-saturation constant for precedence of ammonium | kam | d−1 |
Decline rate | Kd−1 | d−1 |
Ammoniums’ nitrogen | na | mgNm−3 |
Nitrate nitrogen | ni | mgNm−3 |
Soluble reactive phosphorus | SRP | mgPm−3 |
Time | Time | d |
Carbon hydrolysis rate | Kh | d−1 |
Decline caused by herbivorous zooplanktons | Krh | d−1 |
Carnivorous zooplanktons | Zc | mgCm−3 |
Herbivorous zooplankton | Zh | mgCm−3 |
Soluble reactive phosphorus | Ps | mgPm−3 |
Soluble inorganic carbon | Cd | gCm−3 |