Abstract
Phosphorus dynamics are notoriously complex in most aquatic systems, yet can be central to a good understanding of eutrophication and dissolved oxygen phenomena. Most plant-growth simulation models employ a lumped- or single-species approach and thus are relatively crude predictive tools. Few attempt to incorporate the growth patterns of multiple species. One of these is ECOL, a plant-growth model originally developed as a subroutine of the Grand River Simulation Model (GRSM) in the late 1970s. ECOL predicts the biomass, phosphorus uptake and oxgyen production of three types of aquatic plants: the attached alga Cladophora, the rooted aquatic plant Potamogeton, and periphyton. GRSM and ECOL were subsequently used in planning water management strategies for the Grand River Basin (Ontario) and its nine major municipalities in the early 1980s.
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