Accession Number:



Operational Draft Regional Guidebook for the Functional Assessment of High-Gradient Headwater Streams and Low-Gradient Perennial Streams in Appalachia

Descriptive Note:

Technical Report

Corporate Author:

U.S. Army Engineer Research and Development Center Vicksburg United States

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The HGM Approach is a method for developing functional indices and the protocols used to apply these indices to the assessment of ecosystem functions at a site-specific scale. This report uses the HGM Approach to develop a Regional Guidebook to a characterize high-gradient greater than four percent channel slope ephemeral and intermittent streams, known collectively as headwater streams, and wadeable, shadeable perennial streams with less than four percent slope, known as perennial streams, in the Appalachian region b provide the rationale used to select functions for the headwater and perennial stream subclasses c provide the rationale used to select assessment variables at the stream, riparianbuffer zone and watershed levels d provide the rationale used to develop assessment equations e provide data from reference streams and document their use in calibrating variables and assessment equations and f outline the necessary protocols for applying the functional indices to the assessment of stream functions. The rapid assessments provided in this guidebook utilize structural components of streams and their watershed and can be used in conjunction with assessment of water quality and biotic communities if desired.

Subject Categories:

  • Hydrology, Limnology and Potamology

Distribution Statement: