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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 5,500 book chapters authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Source scaling telationships of microearthquakes at Parkfield, CA, determined using the SAFOD pilot hole seismic array Source scaling telationships of microearthquakes at Parkfield, CA, determined using the SAFOD pilot hole seismic array
Weestimate thesourceparametersof34microearthquakes at Parkfield,CA,ranginginsizefromM-0.2 toM2.1, byanalyzingseismogramsrecorded bythe32-level, 3-componentseismic arrayinstalled in theSAFODPilotHole. Wesucceeded in obtainingstablespectral ratios by stacking theratioscalculatedfromthemovingwindowstakenalongtherecordfollowingthedirectwaves.Thesespectral ratios were modeledtodetermine...
Authors
Kazutoshi Imanishi, William L. Ellsworth
Groundwater modeling Groundwater modeling
No abstract available.
Authors
Leonard F. Konikow, Thomas E. Reilly, Paul M. Barlow, Clifford I. Voss
Earthquake Trail, Sanborn County Park: A geology hike along the San Andreas fault Earthquake Trail, Sanborn County Park: A geology hike along the San Andreas fault
On the southern part of the San Francisco Peninsula, the San Andreas fault traverses the actively uplifting Santa Cruz Mountains. The field guide is comprised of a hiking tour along the fault in Sanborn County fault, a visit to a winery and vineyards traversed by the fault, and visits to two wineries that provide vistas of the San Andreas Rift Valley and surroundings.
Authors
Philip W. Stoffer
Models of groundwater ages and residence times Models of groundwater ages and residence times
No abstract available.
Authors
D. K. Solomon, L.N. Plummer, Eurybiades Busenberg, P.G. Cook
Practical application of CFCs in hydrological investigations Practical application of CFCs in hydrological investigations
No abstract available.
Authors
D. K. Solomon, L.N. Plummer, Eurybiades Busenberg, P.G. Cook
Attention of arsenic in Bangladesh sediments: Implications for ground-water development Attention of arsenic in Bangladesh sediments: Implications for ground-water development
No abstract available.
Authors
A. H. Welch, Kenneth G. Stollenwerk, George N. Breit, A. L. Foster, J. C. Yount, J.W. Whitney, M.N. Uddin, A.M. Alam
A broadscale fish-habitat model development process: Genesee Basin, New York A broadscale fish-habitat model development process: Genesee Basin, New York
We describe a methodology for developing species-habitat models using available fish and stream habitat data from New York State, focusing on the Genesee basin. Electrofishing data from the New York Department of Environmental Conservation were standardized and used for model development and testing. Four types of predictive models (multiple linear regression, stepwise multiple linear...
Authors
James E. McKenna, Richard R. McDonald, Chris Castiglione, Sandy S. Morrison, Kurt P. Kowalski, Dora R. May Passino
A spatially explicit approach for evaluating relationships among coastal cutthroat trout, habitat, and disturbance in small Oregon streams A spatially explicit approach for evaluating relationships among coastal cutthroat trout, habitat, and disturbance in small Oregon streams
Abstract has not been submitted
Authors
R. E. Gresswell, C.E. Torgersen, D.S. Bateman, T.J. Guy, S.R. Hendricks, J. E. B. Wofford
A unified strategy for monitoring changes in abundance of birds associated with North American tidal marshes A unified strategy for monitoring changes in abundance of birds associated with North American tidal marshes
An effective approach to species conservation involves efforts to prevent species from becoming threatened with extinction before they become listed as endangered. Standardized monitoring efforts provide the data necessary to estimate population trajectories of many species so that management agencies can identify declining species before they reach the point of endangerment. Species...
Authors
C.J. Conway, Sam Droege
Adaptive harvest management of North American waterfowl populations - recent successes and future prospects Adaptive harvest management of North American waterfowl populations - recent successes and future prospects
The history of North American waterfowl harvest management has been characterized by attempts to use population monitoring data to make informed harvest management decisions. Early attempts can be characterized as intuitive decision processes, and later efforts were guided increasingly by population models and associated predictions. In 1995, a formal adaptive management process was...
Authors
J.D. Nichols, M.C. Runge, Fred A. Johnson, B. Kenneth Williams
Applied historical ecology: Using the past to manage for the future Applied historical ecology: Using the past to manage for the future
No abstract available.
Authors
Thomas W. Swetnam, Craig D. Allen, Julio L. Betancourt
Atlantic Seaduck Project Atlantic Seaduck Project
Atlantic Seaduck Project is being conducted to learn more about the breeding and moulting areas of seaducks in northern Canada and more about their feeding ecology on wintering areas, especially Chesapeake Bay. Satellite telemetry is being used to track surf scoters wintering in Chesapeake Bay, Maryland and black scoters on migrational staging areas in New Brunswick, Canada to breeding...
Authors
Matthew C. Perry