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Field methods
Research procedures and instrumental means to measure, collect data and samples, and observe in the natural areas where the materials, phenomena, structures, or species being studied occur.
Subtopics:
Field experiments (9 items)
Field inventory and monitoring (382 items)
Field sampling (141 items)
Geolocation measurement (39 items)
Real-time monitoring and reporting (174 items)


Results 131 - 140 of 618 listed by similarity [list alphabetically]
Elwha River dam removal -- Rebirth of a river [More info]
Overview of the USGS role in the largest dam removal project in U.S. history.
End-of-month hydrologic condition reports for New York State [More info]
Site to locate most recent or archive reports for end-of-the-month hydrologic conditions with descriptions, data, charts, and maps giving an overview of water conditions during the month for the state of New York.
Endocrine Disruption Found in Fish Exposed to Municipal Wastewater [More info]
Research findings and examples of application to real problems--cause and potential effects of wastewater on fish in streams is explored.
PDF Enhancement of USGS scientific investigations in Texas by using geophysical techniques, 2005-10 [More info]
Annotated bibliography describing the use of electromagnetic surveying to understand the characteristics of aquifers and how they work.
PDF Environmental Monitoring and Assessment Program Western Pilot Project - Conditions of North Dakota Perennial Streams for Water Chemistry and Mercury in Fish Tissue, 2000-2003 [More info]
Sixty-five sampling sites, selected by a statistical design to represent lengths of perennial streams in North Dakota, were chosen to be sampled for water chemistry and mercury in fish tissue to establish unbiased baseline data.
PDF Environmental Monitoring and Assessment Program Western Pilot Project - Information about selected fish and macroinvertebrates sampled from North Dakota perennial streams, 2000-2003 [More info]
Sixty-five sampling sites, selected by a statistical design to represent lengths of perennial streams in North Dakota, were chosen to be sampled for fish and aquatic insects (macroinvertebrates) to establish unbiased baseline data.
Environmental studies of the World Trade Center area after the September 11, 2001 attack [More info]
Report describing the results of an interdisciplinary environmental study of the World Trade Center (WTC) area after the attack on September 11, 2001. The investigations included imaging spectroscopy mapping and laboratory analysis.
PDF Epic Flooding in Georgia, 2009 [More info]
In September of 2009, flooding in parts of Georgia reached levels expected every 500 years. Specific measurements we made and other facts about these disasters described here should help people prepare for floods here and elsewhere.
PDF Eruptions of Hawaiian volcanoes - past, present, and future [More info]
Originally published in 1987, this general-interest booklet has been revised in anticipation of the Centennial of the Hawaiian Volcano Observatory (HVO) in January 2012.
Estimated freshwater withdrawals in Oklahoma [More info]
Freshwater withdrawal estimates for Oklahoma by source and category. Withdrawal data from ground water and surface water for domestic, commercial and agricultural use.
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