Accession Number : ADA244100

Title :   Water Quality Studies in the Upper Watershed of Steele Bayou, Mississippi.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB

Personal Author(s) : Ashby, Steven L. ; Sturgis, Thomas C. ; Price, Cynthia B. ; Brannon, James M. ; Pennington, Judith C.

Report Date : NOV 1991

Pagination or Media Count : 85

Abstract : Sediment and water quality sampling was conducted during a 1-year period at several locations in the watershed of Steele Bayou, Mississippi, to describe spatial and temporal trends. Physicochemical and biological water quality parameters displayed dynamic distribution patterns that were attributed to influences of hydrologic event, channel morphometry, hydrology, and local land use. Influences of hydrologic events were most obvious, with elevated concentrations of suspended material coincident with precipitation and runoff events. Pronounced material transport was suggested by relatively high values of total solids, total suspended solids, and total nutrients. Diel variations of dissolved oxygen concentrations and seasonally high concentrations of nutrients and chlorophyll a suggested a highly productive system, particularly in the downstream regions of Main Canal, Black Bayou, and Steele Bayou. An organic-rich system was indicated by relatively high dissolved organic carbon concentrations. Highly variable distribution of parameter concentrations during the summer low-flow period suggested that local conditions markedly influence water quality. Local influences of riparian vegetation were most apparent in evaluation of the phytoplankton community. In the canopied reach near Leroy Percy State Park, Phytoplankton productivity was lower, and chlorophyll a concentrations were higher when compared to open reaches.

Descriptors :   BANKS(WATERWAYS), CANALS, CHANNELS, CHLOROPHYLLS, COMMUNITIES, CONCENTRATION(CHEMISTRY), CONCENTRATION(COMPOSITION), DISPERSIONS, DISSOLVING, DISTRIBUTION, FLOW, HIGH RATE, HYDROLOGY, LAND USE, MATERIALS, MISSISSIPPI, MORPHOLOGY, NUTRIENTS, OXYGEN, PHYTOPLANKTON, PRECIPITATION, PRODUCTIVITY, REGIONS, RUNOFF, SAMPLING, SEDIMENTS, SOLIDS, SUMMER, TRANSPORT, VARIABLES, VEGETATION, WATER QUALITY, WATERSHEDS.

Subject Categories : Hydrology, Limnology and Potamology
      Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE