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A Simple Stream Monitoring Technique Based on Measurements of Semiconservative Propertiesof Water

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  • ARTHUR J. STEWART

    (Environmental Sciences Division, Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, Tennessee 37831-6036, USA)

Abstract

Correlative relationships exist among conductivity, alkalinity, and hardness in streams due to natural geological and climatological controls, but the relationships among these three water-quality factors can be altered strongly by inputs of ion-rich wastewaters. The degree of alteration can be monitored conveniently by use of a simple chemical perturbation index, computed by subtracting the sum of rank pairwise correlations among the conductivity, alkalinity, and hardness (for observations on each of these variables, measured through time) from 3.0. The chemical perturbation index can be used to document or characterize spatiotemporal changes in stream water quality. This study explains the development of the index's concept and provides examples of its application in an extensive stream monitoring program used to assess ecological conditions in streams on the Department of Energy's Oak Ridge Reservation in east Tennessee, USA. The chemical perturbation index technique may be particularly useful in community-based stream monitoring programs because to its simplicity and low cost.

Suggested Citation

  • Arthur J. Stewart, 2001. "A Simple Stream Monitoring Technique Based on Measurements of Semiconservative Propertiesof Water," Environmental Management, Springer, vol. 27(1), pages 37-46, January.
    • Handle: RePEc:spr:envman:v:27:y:2001:i:1:d:10.1007_s002670010132
    DOI: 10.1007/s002670010132
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