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Publications

Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

Filter Total Items: 175939

New insights on the origin of the Richardson-Richards equation New insights on the origin of the Richardson-Richards equation

The Richardson-Richards equation (RRE), despite known shortcomings especially in regard to preferential flow, provides the basis of the vast majority of unsaturated flow models in use today. L.F. Richardson published this equation in 1922, nine years before L.A. Richards. Whereas Richards approached this problem directly from the groundbreaking developments of Edgar Buckingham...
Authors
John R. Nimmo

Evaluation of an open earthquake early warning system in Mexico, and laboratory tests of their sensors Evaluation of an open earthquake early warning system in Mexico, and laboratory tests of their sensors

Microelectromechanical system (MEMS) accelerometers are useful for seismological and engineering applications because of their ability to record unsaturated large seismic signals. Recent advances in MEMS technologies enable the design of instruments with improved capabilities that also allow the recording of small signals. As a result, MEMS can be useful across a broad dynamic range and...
Authors
Vaclav Kuna, Adam T. Ringler, Diego Melgar

Dust in the Critical Zone: North American case studies Dust in the Critical Zone: North American case studies

The dust cycle facilitates the exchange of particles among Earth's major systems, enabling dust to traverse ecosystems, cross geographic boundaries, and even move uphill against the natural flow of gravity. Dust in the atmosphere is composed of a complex and ever-changing mixture that reflects the evolving human footprint on the landscape. The emission, transport, and deposition of dust...
Authors
Janice Brahney, Ruth C. Heindel, Thomas E. Gill, Gregory Carling, Juan M Gonzalez-Olalla, Jenny L. Hand, Derek V. Mallia, Jeffrey S. Munroe, Kevin Perry, Annie L. Putman, S. McKenzie Skiles, Brad R. Adams, Zachary T. Aanderud, Sarah M. Aarons, Daniela Aguirre, Karin Ardon-Dryer, Molly A. Blakowski, Jessie M. Creamean, Diego P. Fernandez, Hosein Foroutan, Cassandra J. Gaston, Maura Hahnenberger, Sebastian W. Hoch, Daniel K. Jones, Kerry E. Kelly, Otto I. Lang, Josh Lemonte, Richard L. Reynolds, Ramesh P. Singh, Mark Sweeney, Thorn K. Merrill

Implementation of controlled floods for sediment management on the Colorado River in Grand Canyon under aridification Implementation of controlled floods for sediment management on the Colorado River in Grand Canyon under aridification

In addition to supplying water for agriculture, cities, and industry, the Colorado River traverses the Colorado Plateau, including several of the most unique and valued National Parks and Recreation Areas in the United States. Although the water needs of these landscapes were not considered at the time water allocations were first negotiated, these needs were recognized in subsequent...
Authors
Paul E. Grams, David J. Topping, Gerard Lewis Salter, Katherine A. Chapman, Robert B. Tusso, Erich R. Mueller

Quantifying fine sediment infiltration in spawning gravel used by Chinook salmon (Oncorhynchus tshawytscha) in the Sauk River Basin, Washington, 2018–21 Quantifying fine sediment infiltration in spawning gravel used by Chinook salmon (Oncorhynchus tshawytscha) in the Sauk River Basin, Washington, 2018–21

Fine sediment can infiltrate into river substrate that salmonid fish species (Oncorhynchus spp.) use to spawn. High levels of sediment infiltration can increase egg-to-fry mortality, which corresponds to the period when salmonids are still residing in the subsurface gravels. This study quantifies fine sediment infiltration of Chinook salmon (Oncorhynchus tshawytscha) spawning habitat...
Authors
Kristin L. Jaeger, Scott W. Anderson, Anya C. Leach, Scott T. Morris

Boundary spanning increases knowledge and action on invasive species in a changing climate Boundary spanning increases knowledge and action on invasive species in a changing climate

Challenges associated with global change stressors on ecosystems have prompted calls to improve actionable science, including through boundary-spanning activities, which aim to build connections and communication between researchers and natural resource practitioners. By synthesizing and translating research and practitioner knowledge, boundary-spanning activities could support proactive...
Authors
Annette E. Evans, Eva M. Colberg, Jenica M. Allen, Evelyn M. Beaury, Carrie Jean Brown-Lima, Toni Lyn Morelli, Bethany A. Bradley
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