Utilizing Sediment Modeling to assess the connections between Sediment Phosphorus Dynamics and Harmful Algal Blooms in an Eutrophic Lake

Abstract

In this study, the Aquasim model was applied and developed to describe processes in sediments and to link sediment P dynamics with harmful algal blooms for a eutrophic system, the Bay of Quinte, Canađa. The results indicate spatial and temporal heterogeneity in P burial across the three basins of the Bay, depending on historical data of sedimentation rates, P forms, topography, and past land use characteristics within the basins. In recent times, P burial has decreased in the two shallow sites (B and N), which may increase the amount of P released from the sediment. Meanwhile, in the deeper HB site, P burial remains high and relatively stable, corresponding to low and nearly constant P release from the sediment. This leads to high P levels in the bay and the growth of algae.