Accession Number : AD0769514

Title :   An Investigation of the Physical Impact of Sewage Outflow on a River-Estuarine Environment.

Descriptive Note : Research rept.,

Corporate Author : NAVAL ACADEMY ANNAPOLIS MD

Personal Author(s) : Wagner,David D.

Report Date : 21 MAY 1973

Pagination or Media Count : 72

Abstract : The impact of the sewage outflow from the treatment plant in Annapolis, Eastport, Maryland into the Severn River is explored. A buoyant plume model of the behavior of the sewage upon introduction to the receiving water is presented which indicates dilution to a 3% sewage concentration by the time the waste reaches the surface. Bottom currents are investigated and compared with surface flows to assess their effect on dispersion of the contaminants. Finally, a tidal flushing model is constructed that predicts a uniform sewage pollution excess over the conditions of the Chesapeake Bay of approximately .05% throughout the Severn River. The effects of various environmental changes on the system are discussed as predicted by modification of the numerical model. Under present circumstances, no detrimental physical impact on the environment can be shown to exist. (Author)

Descriptors :   (*Estuaries, *Water pollution), (*Water flow, *Sewage), Chesapeake Bay, Maryland, River currents, Quantitative analysis, Effluents, Diffusion, Plumes, Mathematical models, Salinity, Density, Impact

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE