Methods for Characterizing Stream Habitat as Part of the National Water-Quality Assessment Program PDF Download
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Author:
Publisher:
ISBN:
Category : Freshwater ecology
Languages : en
Pages : 56
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Book Description
Author:
Publisher:
ISBN:
Category : Freshwater ecology
Languages : en
Pages : 56
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Book Description
Author:
Publisher:
ISBN:
Category : Stream ecology
Languages : en
Pages : 82
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Book Description
Stream habitat is characterized in the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program as part of an integrated physical, chemical, and biological assessment of the Nation's water quality. The goal of stream habitat characterization is to relate habitat to other physical, chemical, and biological factors that describe water-quality conditions. To accomplish this goal, environmental settings are described at sites selected for water-quality assessment. In addition, spatial and temporal patterns in habitat are examined at local, regional, and national scales. This habitat protocol contains updated methods for evaluating habitat in NAWQA Study Units. Revisions are based on lessons learned after 6 years of applying the original NAWQA habitat protocol to NAWQA Study Unit ecological surveys. Similar to the original protocol, these revised methods for evaluating stream habitat are based on a spatially hierarchical framework that incorporates habitat data at basin, segment, reach, and microhabitat scales. This framework provides a basis for national consistency in collection techniques while allowing flexibility in habitat assessment within individual Study Units. Procedures are described for collecting habitat data at basin and segment scales; these procedures include use of geographic information system data bases, topographic maps, and aerial photographs. Data collected at the reach scale include channel, bank, and riparian characteristics.
Author: Jeffrey R. Deacon
Publisher:
ISBN:
Category : Colorado River Watershed (Colo.-Mexico)
Languages : en
Pages : 92
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Author: Robert J. Gilliom
Publisher:
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Category : Water quality
Languages : en
Pages : 42
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Book Description
Author: Denis F. Healy
Publisher:
ISBN:
Category : Dam retirement
Languages : en
Pages : 70
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Book Description
Author: Anne M. Brasher
Publisher:
ISBN:
Category : Biological monitoring
Languages : en
Pages : 62
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Author:
Publisher:
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Category : Hydrology
Languages : en
Pages : 60
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Book Description
Author: Shabeg S. Sandhu
Publisher: Springer Science & Business Media
ISBN: 9401143439
Category : Science
Languages : en
Pages : 466
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Book Description
The monitoring of point sources by the Environmental Protection Agency (EPA), the states, and the tribes has documented and helped reduce the levels of chemical stressors affecting our ecosystems. With the controls on point sources reducing chemical contamination, new environmental challenges associated with nonpoint sources have emerged. To adequately deal with these new problems, EPA's Office of Research and Development recognized the need to develop an overall under standing of the condition of our ecological resources, the trends in their condition, and the stressors affecting these systems on a broad scale. Toward this end, the En vironmental Monitoring and Assessment Program (EMAP) was established by EPA and has been strategically developing the scientific tools and techniques to monitor and assess the status and trends of aquatic ecosystems. EMAP scientists have developed new indicators and probability-based de signs to fill data gaps in the development of regional-scale assessments of our aquatic resources, as required in the Clean Water Act. We have a scientifically de fensible approach that allows: 100 percent coverage of the aquatic resources within broad geographic areas and the formulation of reference 'conditions for es tablishing the health of these resources. The use of these indicators and designs were successfully demonstrated in the landscapes, streams, and estuaries of the mid-Atlantic states as part of the Mid-Atlantic Integrated Assessment (MAlA).
Author: Michael D. Bilger
Publisher:
ISBN:
Category : Fish communities
Languages : en
Pages : 48
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Author: Anne M. Brasher
Publisher:
ISBN:
Category : Biological monitoring
Languages : en
Pages : 116
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Book Description
