Influences of Submersed Aquatic Macrophytes on Zonation of Sediment Accretion and Composition, Eau Galle Reservoir, Wisconsin
Abstract
Sediment accretion and composition were examined in vegetated and nonvegetated regions across all depths in Eau Galle Reservoir, Wisconsin. Within riverine areas, delta formation was observed. In the lacustrine area of the reservoir (i.e., nonriverine), both sediment accretion and moisture content decreased while sediment density increased, along a gradient of decreasing depth between 9 and 2.5 m. However, accretion again increased at shallower depths (<2. 5 m) occupied by submersed macrophytes. Based on differences in sediment accretion and composition, four zones of sediment accretion were distinguished in the lacustrine area: an accumulation zone (>6 m), a transport zone (3.5 to 6 m), a transport zone (3.5 to 6 m), an erosional zone (2.5 to 3.5 m), and a vegetated littoral zone (<2.5 m). Low-density sediments with relatively high organic materials and nutrient concentrations were found in both the littoral zones and accumulation zones, while high-density sediments with low organic materials and nutrient concentrations were found in the erosional zone.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1991
- Accession Number
- ADA236604
Entities
People
- John W. Barko
- William F. James