James A Smith
James A Smith is a Geophysicist with the Earthquake Hazards Program.
Science and Products
Filter Total Items: 88
U.S. Geological Survey National Strong-Motion Project strategic plan, 2017–22 U.S. Geological Survey National Strong-Motion Project strategic plan, 2017–22
The mission of the National Strong-Motion Project is to provide measurements of how the ground and built environment behave during earthquake shaking to the earthquake engineering community, the scientific community, emergency managers, public agencies, industry, media, and other users for the following purposes: Improving engineering evaluations and design methods for facilities and...
Authors
Brad Aagaard, Mehmet Celebi, Lind Gee, Robert Graves, Kishor Jaiswal, Erol Kalkan, Keith Knudsen, Nico Luco, James Smith, Jamison Steidl, Christopher Stephens
What role do hurricanes play in sediment delivery to subsiding river deltas? What role do hurricanes play in sediment delivery to subsiding river deltas?
The Mississippi River Delta (MRD) has undergone tremendous land loss over the past century due to natural and anthropogenic influences, a fate shared by many river deltas globally. A globally unprecedented effort to restore and sustain the remaining subaerial portions of the delta is now underway, an endeavor that is expected to cost $50–100B over the next 50 yr. Success of this effort...
Authors
James Smith, Samuel J. Bentley, Gregg Snedden, Crawford White
Transforming ecosystems: When, where, and how to restore contaminated sites Transforming ecosystems: When, where, and how to restore contaminated sites
Chemical contamination has impaired ecosystems, reducing biodiversity and the provisioning of functions and services. This has spurred a movement to restore contaminated ecosystems and develop and implement national and international regulations that require it. Nevertheless, ecological restoration remains a young and rapidly growing discipline and its intersection with toxicology is...
Authors
Jason Rohr, Aida Farag, Marc Cadotte, William Clements, James Smith, Cheryl Ulrich, Richard Woods
Database for the geologic map of upper Eocene to Holocene volcanic and related rocks in the Cascade Range, Washington Database for the geologic map of upper Eocene to Holocene volcanic and related rocks in the Cascade Range, Washington
This geospatial database for a geologic map of the Cascades Range in Washington state is one of a series of maps that shows Cascade Range geology by fitting published and unpublished mapping into a province-wide scheme of lithostratigraphic units. Geologic maps of the Eocene to Holocene Cascade Range in California and Oregon complete the series, providing a comprehensive geologic map of...
Authors
Andrew Barron, David Ramsey, James Smith
Geochronology of plutonic rocks and their tectonic terranes in Glacier Bay National Park and Preserve, southeast Alaska Geochronology of plutonic rocks and their tectonic terranes in Glacier Bay National Park and Preserve, southeast Alaska
We have identified six major belts and two nonbelt occurrences of plutonic rocks in Glacier Bay National Park and Preserve and characterized them on the basis of geologic mapping, igneous petrology, geochemistry, and isotopic dating. The six plutonic belts and two other occurrences are, from oldest to youngest: (1) Jurassic (201.6–145.5 Ma) diorite and gabbro of the Lituya belt; (2) Late...
Authors
David Brew, Kathleen Tellier, Marvin Lanphere, Diane Nielsen, James G. Smith, Ronald Sonnevil
Annual fluxes of sediment-associated trace/major elements, carbon, nutrients, and sulfur from US coastal rivers Annual fluxes of sediment-associated trace/major elements, carbon, nutrients, and sulfur from US coastal rivers
About 260–270 Mt of suspended sediment are discharged annually from the conterminous USA; approximately 69% derives from Gulf rivers (n = 36), 24% from Pacific rivers (n = 42), and 7% from Atlantic rivers (n = 54). Elevated sediment-associated chemical concentrations relative to baseline levels occur in the reverse order of sediment discharges: Atlantic rivers (49%) > Pacific rivers (40%...
Authors
Arthur Horowitz, Verlon Stephens, Kent Elrick, James Smith
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 88
U.S. Geological Survey National Strong-Motion Project strategic plan, 2017–22 U.S. Geological Survey National Strong-Motion Project strategic plan, 2017–22
The mission of the National Strong-Motion Project is to provide measurements of how the ground and built environment behave during earthquake shaking to the earthquake engineering community, the scientific community, emergency managers, public agencies, industry, media, and other users for the following purposes: Improving engineering evaluations and design methods for facilities and...
Authors
Brad Aagaard, Mehmet Celebi, Lind Gee, Robert Graves, Kishor Jaiswal, Erol Kalkan, Keith Knudsen, Nico Luco, James Smith, Jamison Steidl, Christopher Stephens
What role do hurricanes play in sediment delivery to subsiding river deltas? What role do hurricanes play in sediment delivery to subsiding river deltas?
The Mississippi River Delta (MRD) has undergone tremendous land loss over the past century due to natural and anthropogenic influences, a fate shared by many river deltas globally. A globally unprecedented effort to restore and sustain the remaining subaerial portions of the delta is now underway, an endeavor that is expected to cost $50–100B over the next 50 yr. Success of this effort...
Authors
James Smith, Samuel J. Bentley, Gregg Snedden, Crawford White
Transforming ecosystems: When, where, and how to restore contaminated sites Transforming ecosystems: When, where, and how to restore contaminated sites
Chemical contamination has impaired ecosystems, reducing biodiversity and the provisioning of functions and services. This has spurred a movement to restore contaminated ecosystems and develop and implement national and international regulations that require it. Nevertheless, ecological restoration remains a young and rapidly growing discipline and its intersection with toxicology is...
Authors
Jason Rohr, Aida Farag, Marc Cadotte, William Clements, James Smith, Cheryl Ulrich, Richard Woods
Database for the geologic map of upper Eocene to Holocene volcanic and related rocks in the Cascade Range, Washington Database for the geologic map of upper Eocene to Holocene volcanic and related rocks in the Cascade Range, Washington
This geospatial database for a geologic map of the Cascades Range in Washington state is one of a series of maps that shows Cascade Range geology by fitting published and unpublished mapping into a province-wide scheme of lithostratigraphic units. Geologic maps of the Eocene to Holocene Cascade Range in California and Oregon complete the series, providing a comprehensive geologic map of...
Authors
Andrew Barron, David Ramsey, James Smith
Geochronology of plutonic rocks and their tectonic terranes in Glacier Bay National Park and Preserve, southeast Alaska Geochronology of plutonic rocks and their tectonic terranes in Glacier Bay National Park and Preserve, southeast Alaska
We have identified six major belts and two nonbelt occurrences of plutonic rocks in Glacier Bay National Park and Preserve and characterized them on the basis of geologic mapping, igneous petrology, geochemistry, and isotopic dating. The six plutonic belts and two other occurrences are, from oldest to youngest: (1) Jurassic (201.6–145.5 Ma) diorite and gabbro of the Lituya belt; (2) Late...
Authors
David Brew, Kathleen Tellier, Marvin Lanphere, Diane Nielsen, James G. Smith, Ronald Sonnevil
Annual fluxes of sediment-associated trace/major elements, carbon, nutrients, and sulfur from US coastal rivers Annual fluxes of sediment-associated trace/major elements, carbon, nutrients, and sulfur from US coastal rivers
About 260–270 Mt of suspended sediment are discharged annually from the conterminous USA; approximately 69% derives from Gulf rivers (n = 36), 24% from Pacific rivers (n = 42), and 7% from Atlantic rivers (n = 54). Elevated sediment-associated chemical concentrations relative to baseline levels occur in the reverse order of sediment discharges: Atlantic rivers (49%) > Pacific rivers (40%...
Authors
Arthur Horowitz, Verlon Stephens, Kent Elrick, James Smith
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.