Physical integrity: the missing link in biological monitoring and TMDLs
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Physical integrity: the missing link in biological monitoring and TMDLs
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2009-01-14
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Abstract
The Clean Water Act mandates that the
chemical, physical, and biological integrity of our
nation’s waters be maintained and restored. Physical
integrity has often been defined as physical
habitat integrity, and as such, data collected during
biological monitoring programs focus primarily on
habitat quality. However, we argue that channel
stability is a more appropriate measure of physical
integrity and that channel stability is a foundational
element of physical habitat integrity in
low-gradient alluvial streams.We highlight assessment tools that could supplement stream assessments
and the Total Maximum Daily Load stressor
identification process: field surveys of bankfull
cross-sections; longitudinal thalweg profiles; particle
size distribution; and regionally calibrated,
visual, stream stability assessments. Benefits of
measuring channel stability include a more informed
selection of reference or best attainable
stream condition for an Index of Biotic
Integrity, establishment of a baseline for monitoring
changes in present and future condition, and
indication of channel stability for investigations
of chemical and biological impairments associated
with sediment discontinuity and loss of habitat
quality.
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Asmus, Brenda; Magner, Joseph, A.; Vondracek, Bruce; Perry, Jim. (2009). Physical integrity: the missing link in biological monitoring and TMDLs. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/183536.
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