Sedimentation, sea-level rise and circulation in Florida Bay

Abstract

Issue Recent algal blooms and seagrass mortality have raised concerns about the water quality of Florida Bay, particularly its nutrient content (nitrogen and phosphorus), hypersalinity, and turbidity. Water quality is closely tied to sediment transport processes because resuspension of sediments increases turbidity, releases stored nutrients, and facilitates sediment export to the reef tract. Over decades to centuries, bathymetric changes due to erosion or sediment deposition affect water circulation and hypersalinity. The effect on circulation depends on the interplay between sediment accumulation and sea-level rise. The goal of this U. S. Geological Survey project is to document and quantify short- and long- term processes associated with sediment transport so that the influence of sediments on water quality can be better defined and later integrated with numerical modeling efforts conducted by cooperating agencies.