Effect of Sewage Outfall on a Stream Ecosystem
Human activity has affected profoundly streams and lakes in all parts of the world. Streams have been subjected to additions of gross amounts of domestic sewage, industrial effluents (e.g., wastes from tanneries, pulp mills, creameries, steel mills, and chemical factories), agricultural wastes, oil spills, mining wastes, urban runoff, radioactive materials, pesticides, waste heat, and numerous other pollutants, often because it was considered expedient and economical to have the unwanted materials carried away (“out of sight”) by the flowing water. Likewise, under the guise of “progress,” streams have been channelized, stabilized, dewatered (for irrigation), and super-watered (artificially increased flow for drinking and power plant needs). In most cases, the effects on the aquatic biota are insidiously cumulative. In some cases, the effects are readily apparent [e.g., acid mine drainage; see Parsons (1968)], but in others the effects accumulate more slowly [e.g., accumulations of trace metals; see Whitton and Say (1975)]. In all cases, a longitudinal gradient develops below the point of insult and, given enough time (distance) without further insult, the stream ecosystem generally recovers to a state of well-being.
KeywordsAcid Mine Drainage Domestic Sewage American Public Health Association Pulp Mill Coliform Bacterium
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- American Public Health Association. 1989. Standard Methods for the Examination of Water and Wastewater. 17th Ed. Amer. Public Health Assoc., Inc., New York. 1550 pp.Google Scholar
- Bertucci, J.J., C. Lue-Hing, D. Zenz, and S.J. Sedita. 1977. Inactivation of viruses during anaerobic sludge digestion. J. Water Poll. Control. Fed. 49: 1642–1651.Google Scholar
- Bolton, R.L. and L. Klein. 1971. Sewage Treatment-Basic Principles and Trends. Ann Arbor Publ. Michigan. 256 pp.Google Scholar
- Borchardt, J.A., J.K. Cleland, W.J. Redman, and G. Oliver (eds). 1977. Viruses and Trace Contaminants in Water and Wastewater. Ann Arbor Sci. Publ., Michigan. 249 pp. Hammer, D.A. (ed). 1989.Google Scholar
- Constructed Wetlands for Wastewater Treatment. Municipal, Industrial and Agricultural. Lewis Publ., Chelsea, MI. 831 pp.Google Scholar
- Hanes, N.B., G.A. Delaney, and C.J. O’Leary. 1965. Relationship between Escherichia coli, Type I, coliform and enterococci in water. J. Boston Soc. Civil Engrs. 52:129–140.Google Scholar
- Hynes, H.B.N. 1963. The Biology of Polluted Waters. Liverpool Univ. Press. 202 pp. Likens, G.E. (ed). 1972. Nutrients and Eutrophication. Special Symposia, Vol. I., Amer. Soc. Limnol. Oceanogr., Allen Press, Lawrence, KS. 328 pp.Google Scholar
- Parsons, J.D. 1968. The effects of acid strip-mine effluents on the ecology of a stream. Arch. Hydrobiol. 65:25–50.Google Scholar
- Rodina, A.G. 1972. Methods in Aquatic Microbiology. Translated and revised by R.R. Colwell and M.S. Zambruski. Univ. Park Press, Baltimore. 461 pp.Google Scholar
- Rohlich, G.A. and P.D. Uttormark. 1972. Wastewater treatment and eutrophication. pp. 231245. In: G.E. Likens, Editor. Nutrients and Eutrophication. Special Symposia, Vol. I. Amer. Soc. Limnol. Oceanogr. Allen Press, Lawrence, KS.Google Scholar
- Whitton, B.A. and P.J. Say. 1975. Heavy metals. pp. 286–311. In: B.A. Whitton, Editor. River Ecology. Univ. of California Press, Berkeley.Google Scholar