Accession Number:

ADA073032

Title:

Aquatic Rational Threshold Value (RTV) Concepts for Army Environmental Impact Assessment.

Descriptive Note:

Final rept.,

Corporate Author:

CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL

Personal Author(s):

• Riggins, Robert E.
• Smith, Edgar D.

Report Date:

1979-07-01

Pagination or Media Count:

41.0

Abstract:

This report presents the results of a study undertaken to develop practical techniques for evaluating the significance of predicted water quality impacts. Issues concerning the definition and use of the term significant are discussed at length. Existing aquatic ecosystem models are reviewed, potential criteria for measuring significance are examined, and a concept framework is presented. The result is a Rational Threshold Value RTV concept for measuring the significance of impacts on aquatic features. Initial development of an aquatic RTV involves determination of toxicity levels resulting from the introduction of pollutants into aquatic ecosystems, and expression of the effects of these toxicants on population levels of selected fish species. Author

Descriptors:

• *ENVIRONMENTAL IMPACT STATEMENTS
• PREDICTIONS
• MODELS
• TOXICITY
• POPULATION
• POLLUTANTS
• INDEXES
• EQUATIONS
• CORRELATION TECHNIQUES
• WATER QUALITY
• FISHES
• ECOLOGY
• ALGAE

Subject Categories:

• Ecology
• Hydrology, Limnology and Potamology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE