USGS: Science Topics: field methods

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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)

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Results 51 - 60 of 617 listed by similarity [list alphabetically]

Assessing the vulnerability of public-supply wells to contamination--Edwards aquifer near San Antonio, Texas [More info]: Well vulnerability results from the young age of groundwater. Karst features permit contaminants to move into the aquifer easily, leading to a well mixed aquifer; geochemical processes do not degrade contaminants quickly.
Assessment of aquatic macroinvertebrate communities in the Autauga Creek watershed, Autauga County, Alabama, 2009 [More info]: Previous analysis showed this area to have reduced macroinvertebrate biodiversity, an important measure of ecosystem health. New observations indicate that conditions have improved; report includes methods and results of sampling.
Atlantic margin offshore sediments: cooperative database and GIS development website [More info]: This site is designed to provide information on federal interagency and cooperative developments related to coastal sand and gravel resources and management issues along the Atlantic continental margin.
Atmospheric Deposition Program of the U.S. Geological Survey [More info]: Document on the federally supported interagency National Acid Precipitation Assessment Program (NAPAP) covering research on causes and effects of acid precipitation with the USGS as the lead agency for monitoring wet acid deposition.
Avian influenza news and disease information [More info]: News regarding US efforts to monitor the spread of highly pathogenic avian influenza, with links to bulletins, FAQ list, field guides, and other resources.
Avian Influenza: Information and on-going research at the USGS Alaska Science Center [More info]: Maps and information about potential spread of avian influenza in migratory birds in Alaska. Includes descriptions and photos of the waterfowl that are being monitored.
Bat research in California [More info]: Brief review of bat research in the San Francisco Bay area and southern California providing land managers with information on the occurrence and status of bat species with links to bat inventories for California and related material.
Bats of Ouray National Wildlife Refuge [More info]: Detailed information on capture-and-release surveying as well as acoustic monitoring of bats indicates prevalence of various species and, for the captured specimens, physiological characteristics.
Bedrock and soil geochemistry from Voyageurs National Park, Minnesota [More info]: Maps and text (Word or PDF format) and database (Excel or HTML format) for bedrock, forest floor, and mineral soil sampling in Voyageurs National Park, Minnesota to establish the background and baseline geochemistry and terrestrial mercury sources.
Bemidji crude-oil research project (toxic substances) [More info]: Home page contains information, data, maps, and images relating to hydrologic research that has been conducted at the Bemidji research site.

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