Components of the phosphorus
budget
¥
Watershed land use
Ð
Coefficient
Ð
Land area
¥
Septic systems
Ð
Soil retention
Ð
Occupancy rates
¥
Internal recycling and
sediment release
Ð
Anoxia
Ð
Water quality
The external sources of phosphorus consist of the different land uses and other factors such as septic systems.
The model also includes internal sources such as sediment release.