The effects, intentional or unintentional, beneficial or harmful, direct or indirect, which human activities have upon the environment and living things.
Environmental effects of historical mining in the Animas River watershed, southwestern Colorado [ More info] History and summary maps showing metal concentrations downstream of the mining area.
Environmental processes that affect mineral deposits in the Eastern United States [ More info] Studies in Eastern United States on massive sulfide deposits in Maine, Vermont, Great Smoky Mountains, and Virginia to assess potential environmental impacts.
Erosion in the Rio Puerco: geography and processes [ More info] Paper on the accelerated erosion of the Rio Puerco, a tributary of the Rio Grande in New Mexico, which has deepened and widened its channel, or arroyo, since the settlement of the region.
Evaluation of fecal contamination by human and ruminant sources in upper Fountain Creek, Colorado, 2007-2008, by using multiple lines of evidence: [ More info] Microbial source tracking analysis of water sampled supports the argument that birds are the primary source of fecal contamination during the warm season.
Examination of brine contamination risk to aquatic resources from petroleum development in the Williston Basin [ More info] Wetlands and oil wells shouldn't mix, but in some areas they do. This explains what problems may arise and how we study the effects of highly salty water produced by oil wells when it leaks into nearby wetlands and streams.
Fish passage through dams in large temperate floodplain rivers: an annotated bibliography [ More info] Report describes an electronic database of annotated citations relevant to fish passage through dams. Document may be searched using the search form or downloaded as an Endnote, Microsoft Word, or WordPerfect
Fluvial geomorphology studies in Kansas [ More info] Report of completed studies that have investigated the response of river and stream channels in Kansas to a variety of human-caused and natural disturbances.
Forecast Mekong [ More info] USGS works with the Department of State to share data and support local research efforts and elevate knowledge about this river and delta in maintaining food security and livelihoods in the region.
Fragile environments: San Francisco Bay wetlands [ More info] Overview with links to studies on the effects of human activity on the San Francisco estuary with loss of historic fresh and saltwater tidal marshes reducing habitats, introducing contaminants in waste, and creating dredging problems.
Framework for Assessing the Sustainability of Monitored Natural Attenuation [ More info] Research findings and examples of application to real problems--When can natural processes to reduce, or even destroy, contaminants at toxic waste sites be relied on?
Alphabetical Index of Topics
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