Computer Simulation of Phosphorus Cycling in the Sediment-Water System of Eutrophic Lakes

摘要

It has become increasingly evident that the release of phosphorus from the sediments of eutrophic lakes is a major factor in the excessive productivity of these lakes. Using the diagenic partial differential equations which model the sediment processes of lakes and oceans, a computer simulation model has been developed to study the P dynamics in lake sediments. The model allows both time and depth variation of the key equation parameters. The model clearly shows that the upper 10 cm of sediment is the main region of activity. The model generates summary tables and 3D plots of key variables over a year's simulation. Data from L. Sebasticook, Newport, Maine are used to test the model.