Reports
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 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
Filter Total Items: 85089
Historical methane hydrate project review Historical methane hydrate project review
In 1995, U.S. Geological Survey made the first systematic assessment of the volume of natural gas stored in the hydrate accumulations of the United States. That study, along with numerous other studies, has shown that the amount of gas stored as methane hydrates in the world greatly exceeds the volume of known conventional gas resources. However, gas hydrates represent both a scientific...
Authors
Timothy Collett, Jang-Jun Bahk, Matt Frye, Dave Goldberg, Jarle Husebo, Carolyn Koh, Mitch Malone, Craig Shipp, Marta Torres
Historical rock falls in Yosemite National Park, California (1857-2011) Historical rock falls in Yosemite National Park, California (1857-2011)
Inventories of rock falls and other types of landslides are valuable tools for improving understanding of these events. For example, detailed information on rock falls is critical for identifying mechanisms that trigger rock falls, for quantifying the susceptibility of different cliffs to rock falls, and for developing magnitude-frequency relations. Further, inventories can assist in...
Authors
Greg M. Stock, Brian D. Collins, David J. Santaniello, Valerie L. Zimmer, Gerald F. Wieczorek, James B. Snyder
Holocene core logs and site methods for modern reef and head-coral cores - Dry Tortugas National Park, Florida Holocene core logs and site methods for modern reef and head-coral cores - Dry Tortugas National Park, Florida
The Dry Tortugas are a series of islands, banks, and channels on a carbonate platform off the west end of the Florida Keys. Antecedent topography of the Dry Tortugas reflects carbonate accumulations of the last interglacial (marine isotope substage 5e, ~ 125,000 years ago, ka) when sea level was ~ 6 to 7 meters (m) higher than present (Schrag and others, 2002). The substage 5e surface...
Authors
Todd D. Hickey, Christopher D. Reich, Kristine L. DeLong, Richard Z. Poore, John Brock
Human effects on the hydrologic system of the Verde Valley, central Arizona, 1910–2005 and 2005–2110, using a regional groundwater flow model Human effects on the hydrologic system of the Verde Valley, central Arizona, 1910–2005 and 2005–2110, using a regional groundwater flow model
Water budgets were developed for the Verde Valley of central Arizona in order to evaluate the degree to which human stresses have affected the hydrologic system and might affect it in the future. The Verde Valley is a portion of central Arizona wherein concerns have been raised about water availability, particularly perennial base flow of the Verde River. The Northern Arizona Regional...
Authors
Bradley D. Garner, D. R. Pool, Fred D. Tillman, Brandon T. Forbes
Hurricane Irene and associated floods of August 27-30, 2011, in New Jersey Hurricane Irene and associated floods of August 27-30, 2011, in New Jersey
Intense rainfall from Hurricane Irene during August 27–30, 2011, inundated streams throughout New Jersey resulting in peak streamflows exceeding the 100-year recurrence interval at many streamgages and causing heavy property and road damage. The rain event affected the entire State. Some notably affected areas were the Passaic and Hackensack River Basins in northeastern New Jersey with...
Authors
Kara M. Watson, Jerilyn V. Collenburg, Robert G. Reiser
Hurricane Isaac: observations and analysis of coastal change Hurricane Isaac: observations and analysis of coastal change
Understanding storm-induced coastal change and forecasting these changes require knowledge of the physical processes associated with a storm and the geomorphology of the impacted coastline. The primary physical process of interest is sediment transport that is driven by waves, currents, and storm surge associated with storms. Storm surge, which is the rise in water level due to the wind
Authors
Kristy K. Guy, Hilary F. Stockdon, Nathaniel G. Plant, Kara S. Doran, Karen L.M. Morgan
Hurricane Sandy science plan: coastal impact assessments Hurricane Sandy science plan: coastal impact assessments
Hurricane Sandy devastated some of the most heavily populated eastern coastal areas of the Nation. With a storm surge peaking at more than 19 feet, the powerful landscape-altering destruction of Hurricane Sandy is a stark reminder of why the Nation must become more resilient to coastal hazards. In response to this natural disaster, the U.S. Geological Survey (USGS) received a total of...
Authors
Jakob M. Stronko
Hurricane Sandy science plan: coastal topographic and bathymetric data to support hurricane impact assessment and response Hurricane Sandy science plan: coastal topographic and bathymetric data to support hurricane impact assessment and response
Hurricane Sandy devastated some of the most heavily populated eastern coastal areas of the Nation. With a storm surge peaking at more than 19 feet, the powerful landscape-altering destruction of Hurricane Sandy is a stark reminder of why the Nation must become more resilient to coastal hazards. In response to this natural disaster, the U.S. Geological Survey (USGS) received a total of...
Authors
Jakob M. Stronko
Hurricane Sandy science plan: impacts of environmental quality and persisting contaminant exposure Hurricane Sandy science plan: impacts of environmental quality and persisting contaminant exposure
Hurricane Sandy devastated some of the most heavily populated eastern coastal areas of the Nation. With a storm surge peaking at more than 19 feet, the powerful landscape-altering destruction of Hurricane Sandy is a stark reminder of why the Nation must become more resilient to coastal hazards. In response to this natural disaster, the U.S. Geological Survey (USGS) received a total of...
Authors
Sarah A. Caskie
Hurricane Sandy science plan: impacts of storm surge, including disturbed estuarine and bay hydrology Hurricane Sandy science plan: impacts of storm surge, including disturbed estuarine and bay hydrology
Hurricane Sandy devastated some of the most heavily populated eastern coastal areas of the Nation. With a storm surge peaking at more than 19 feet, the powerful landscape-altering destruction of Hurricane Sandy is a stark reminder of why the Nation must become more resilient to coastal hazards. In response to this natural disaster, the U.S. Geological Survey (USGS) received a total of...
Authors
Sarah A. Caskie
Hurricane Sandy science plan: impacts to coastal ecosystems, habitats, and fish and wildlife Hurricane Sandy science plan: impacts to coastal ecosystems, habitats, and fish and wildlife
Hurricane Sandy devastated some of the most heavily populated eastern coastal areas of the Nation. With a storm surge peaking at more than 19 feet, the powerful landscape-altering destruction of Hurricane Sandy is a stark reminder of why the Nation must become more resilient to coastal hazards. In response to this natural disaster, the U.S. Geological Survey (USGS) received a total of...
Authors
Warren H. Campbell
Hurricane Sandy science plan: New York Hurricane Sandy science plan: New York
Hurricane Sandy is a stark reminder of why the Nation must become more resilient to coastal hazards. More than one-half of the U.S. population lives within 50 miles of a coast, and this number is increasing. The U.S. Geological Survey (USGS) is one of the largest providers of geologic and hydrologic information in the world. Federal, State, and local partners depend on the USGS science...
Authors
Clarice N. Ransom