Book Chapters
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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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Nowcasting recreational water quality
Advances in molecular techniques may soon provide new opportunities to provide more timely information on whether recreational beaches are free from fecal contamination. However, an alternative approach is the use of predictive models. This chapter presents a summary of these developing efforts. First, we describe documented physical, chemical, and biological factors that have been demonstrated by
Authors
Alexandria B. Boehm, Richard L. Whitman, Meredith Nevers, Deyi Hou, Stephen B. Weisberg
Atlantic salmon genetics: Past, present and what's in the future?
No abstract available
Authors
Jennifer L. Nielsen
Macroinvertebrates as Biotic Indicators of Environmental Quality
No abstract available.
Authors
James L. Carter, Vincent H. Resh, Morgan J. Hannaford, Marilyn J. Myers
Chapter 7 Magmatic-hydrothermal fluid interaction and mineralization in alkali-syenite nodules from the Breccia Museo pyroclastic deposit, Naples, Italy
The Breccia Museo, a pyroclastic flow that crops out in the Campi Flegrei volcanic complex (Naples, Italy), contains alkali-syenite (trachyte) nodules with enrichment in Cl and incompatible elements (e.g., U, Zr, Th, and rare-earth elements). Zircon was dated at ≈52 ka, by U-Th isotope systematics using a SHRIMP. Scanning electron microscope and electron microprobe analysis of the constituent phas
Authors
Luca Fedele, Maurizio Tarzia, Harvey E. Belkin, Benedetto De Vivo, Annamaria Lima, Jacob Lowenstern
Measuring thoron (220Rn) in natural waters
No abstract available.
Authors
W. C. Burnett, Natasha T. Dimova, Henrieta Dulaiova, Derek Lane-Smith, Bahman Parsa, Zoltan Szabo
Interferometric synthetic-aperature radar (InSAR): Chapter 5
Geodesists are, for the most part, a patient and hardworking lot. A day spent hiking to a distant peak, hours spent waiting for clouds to clear a line-of-sight between observation points, weeks spent moving methodically along a level line – such is the normal pulse of the geodetic profession. The fruits of such labors are all the more precious because they are so scarce. A good day spent with an e
Authors
Daniel Dzurisin, Zhong Lu
Selection for salt tolerance in tidal freshwater swamp species: Advances using baldcypress as a model for restoration: Chapter 14
Worldwide, the intrusion of salinity into irrigated and natural landscapes has major economic and cultural impacts and has resulted in large reductions in crop yields (Epstein et al. 1980; Flowers 2003). Losses have prompted wide-scale programs to improve the salt tolerance of many agronomic species or to identify crop species that can tolerate lands affected by low levels of salinity. Few histori
Authors
Ken W. Krauss, Jim L. Chambers, David L. Creech
Ecology of tidal freshwater forests in coastal deltaic Louisiana and northeastern South Carolina: Chapter 9
Tidal freshwater swamps in the southeastern United States are subjected to tidal hydroperiods ranging in amplitude from microtidal (<0.1 m) to mesotidal (2-4 m), both having different susceptibilities to anthropogenic change. Small alterations in flood patterns, for example, can switch historically microtidal swamps to permanently flooded forests, scrub-shrub stands, marsh, or open water but are l
Authors
William H. Conner, Ken W. Krauss, Thomas W. Doyle
Tidal freshwater forested wetlands: Future research needs and an overview of restoration: Chapter 17
Studies of tidal freshwater forested wetlands are few in contrast to the diversity of conditions and information needs that exist for this ecosystem type. Basic information is lacking on the physiological ecology of major wetland tree species under natural settings, the structure and dynamics of pure and mixed species communities, soil-plant interactions, biogeochemistry, hydrology, soils, wildlif
Authors
William H. Conner, Courtney T. Hackney, Ken W. Krauss, John W. Jr. Day
The role of fault zone drilling
The objective of fault-zone drilling projects is to directly study the physical and chemical processes that control deformation and earthquake generation within active fault zones. An enormous amount of field, laboratory, and theoretical work has been directed toward the mechanical and hydrological behavior of faults over the past several decades. Nonetheless, it is currently impossible to differe
Authors
M.D. Zoback, Stephen H. Hickman, William L. Ellsworth