Accession Number : ADA299645

Title :   Evaluation of the Effect of Benthic Barrier Placement on Sediment Physical and Chemical Conditions.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS

Personal Author(s) : Eakin, Harry L. ; Barko, John W.

PDF Url : ADA299645

Report Date : AUG 1995

Pagination or Media Count : 46

Abstract : Investigations examining the effects of benthic barrier placement on sediment physical and chemical conditions, interstitial water, and surficial water were conducted in Eau Galle Reservoir, Wisconsin, and Lake Guntersville, Alabama. Long-term physical and chemical effects were minimal when barriers were placed on relatively coarse-textured sediments. On fine-textured sediments, however, physical effects were more pronounced and evidenced by decreases in sediment moisture content, increases in sediment density, and decreases in sediment organic matter content. The most pronounced effects of barrier placement were an increase in ammonium-nitrogen and a decrease in iron concentrations in the interstitial water of fine-textured sediments. Anoxic conditions were found in the surficial water beneath placements at all study sites. No significant differences were evident in the growth of aquatic plants on sediments following long-term barrier placements.

Descriptors :   *SEDIMENTS, *AQUATIC PLANTS, DENSITY, SAND, MOISTURE CONTENT, IRON, ENVIRONMENTAL IMPACT, SEASONAL VARIATIONS, ORGANIC MATERIALS, SURFACE WATERS, PLANT GROWTH, BARRIERS, AMMONIUM COMPOUNDS, VEGETATION, WATER RESOURCES, ALABAMA, LAKES, CONCENTRATION(CHEMISTRY), RESERVOIRS, BENTHONIC ZONES, PHOSPHATES, WISCONSIN, ANOXIA, SILT, WATER CHEMISTRY, CORE SAMPLING, NUTRIENT ANALYSIS.

Subject Categories : Biological Oceanography
      Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE