Conference Papers
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 almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
Filter Total Items: 5599
Water-quality monitoring and process understanding in support of environmental policy and management Water-quality monitoring and process understanding in support of environmental policy and management
The quantity and quality of freshwater at any point on the landscape reflect the combined effects of many processes operating along hydrological pathways within a drainage basin/watershed/catchment. Primary drivers for the availability of water are landscape changes and patterns, and the processes affecting the timing, magnitude, and intensity of precipitation, including global climate...
Authors
N.E. Peters
Cross-borehole flow tests and insights into hydraulic connections in fractured mudstone and sandstone Cross-borehole flow tests and insights into hydraulic connections in fractured mudstone and sandstone
Cross-borehole flow tests provided insights into hydraulic connections in fractured and dipping mudstone and sandstone that were consistent with the lithostratigraphic and structural framework of a VOCcontaminated bedrock research site in west-central New Jersey. Two cross-borehole flow tests were completed. Each test involved measurement and analysis of transient flow in a newly...
Authors
John H. Williams, Pierre Lacombe, Carole D. Johnson, Frederick L. Paillet
New SHRIMP-RG U-Pb zircon ages and Sm-Nd analyses of Proterozoic metamorphic rocks of the San Gabriel basement terrane: Keys for Laurentian crustal reconstruction New SHRIMP-RG U-Pb zircon ages and Sm-Nd analyses of Proterozoic metamorphic rocks of the San Gabriel basement terrane: Keys for Laurentian crustal reconstruction
No abstract available.
Authors
Wayne R. Premo, Jonathan A. Nourse, Pedro Castineiras, Karl S. Kellogg
Impacts of climate change on wintertime precipitation, snowmelt regime, surface runoff, and infiltration in the northeastern USA during the 21st century Impacts of climate change on wintertime precipitation, snowmelt regime, surface runoff, and infiltration in the northeastern USA during the 21st century
No abstract available.
Authors
Thomas G. Huntington, J. Sheffield, K. Hayhoe
Holocene reworking of a sand sheet in the Merrimack Embayment, Western Gulf of Maine Holocene reworking of a sand sheet in the Merrimack Embayment, Western Gulf of Maine
Recent bathymetric, backscatter, and seafloor sediment samples demonstrate that a large sand sheet was formed in the inner shelf by the reworking of the Merrimack River lowstand delta (deposited 12 kya; currently at 45 m depth) and braid plain during the Holocene transgression. Asymmetric bedforms and distinct grain size distributions suggest the sand sheet is actively being reworked by...
Authors
C.J. Hein, D. M. FitzGerald, W. Barnhardt
Overview: The Chemehuevi Formation along the lower Colorado River Overview: The Chemehuevi Formation along the lower Colorado River
A distinctive set of fine-grained deposits occurs throughout the lower Colorado River Valley, extending from just below the mouth of Grand Canyon to well into the river delta below Yuma, AZ (Figure 1), an along-channel distance of over 700 km. Upstream of Parker, Arizona, the deposits consist of scattered erosional remnants up to 150 m above the modern floodplain. Below Parker, they...
Authors
Daniel V. Malmon, Keith A. Howard
Stratigraphy of Colorado River deposits in lower Mohave Valley, Arizona and California Stratigraphy of Colorado River deposits in lower Mohave Valley, Arizona and California
Deposits in lower Mohave Valley and upper Topock Gorge near Topock, Arizona and Park Moabi, California record a succession of depositional and erosional events since late Miocene time that relate to the development of the Colorado River. Upper Miocene alluvial fans were deposited toward a depocenter east of the present valley bottom, indicating there was no valley outlet then through the...
Authors
Keith A. Howard, D.V. Malmon
Wild, scenic and rapid trip down the Colorado River trough: Desert Symposium field trip Wild, scenic and rapid trip down the Colorado River trough: Desert Symposium field trip
This rapid trip will explore wild fluvial and tectonic events resulting in scenic and rugged topography. The extreme differences in elevation caused valleys to be choked by alluvium and incised by the Colorado River drainage system.
Authors
R. E. Reynolds, J. Faulds, P.K. House, Keith A. Howard, Daniel V. Malmon, C. F. Miller, P. A. Pearthree
Integrating image and GIS processing to map a complex landscape with national vegetation classification system protocols and high spatial resolution image data Integrating image and GIS processing to map a complex landscape with national vegetation classification system protocols and high spatial resolution image data
No abstract available.
Authors
Amina Rangoonwala, Elijah Ramsey
Sources of seasonal water-supply forecast skill in the western US Sources of seasonal water-supply forecast skill in the western US
Many water supplies in the western US depend on water that is stored in snowpacks and reservoirs during the cool, wet seasons for release and use in the following warm seasons. Managers of these water supplies must decide each winter how much water will be available in subsequent seasons so that they can proactively capture and store water and can make reliable commitments for later...
Authors
Michael Dettinger
Two middle Pleistocene glacial-interglacial cycles from the Valle Grande, Jemez Mountains, northern New Mexico Two middle Pleistocene glacial-interglacial cycles from the Valle Grande, Jemez Mountains, northern New Mexico
A long-lived middle Pleistocene lake formed in the Valle Grande, a large moat valley of the Valles caldera innorthern New Mexico, when a post-caldera eruption (South Mountain rhyolite) dammed the drainage out of the caldera. Thedeposits of this lake were cored in May 2004 (GLAD5 project, hole VC-3) and 81 m of mostly lacustrine silty mud wererecovered. A tentative chronology has been...
Authors
Peter J. Fawcett, Jeff Heikoop, Fraser Goff, R. Scott Anderson, L. Donohoo-Hurley, John William Geissman, Giday WoldeGabriel, Craig D. Allen, Catrina M. Johnson, Susan J. Smith, Julianna Fessenden-Rahn