Michelle Sneed
Michelle Sneed is a hydrologist with the U.S. Geological Survey. She spent 25 years leading land subsidence research in the California Water Science Center and now serves as the Technical Support Coordinator for Groundwater Science in the Office of Quality Assurance.
Michelle received her BS and MS degrees in geology from California State University, Sacramento, where she subsequently taught geology classes for 10 years. While at the California Water Science Center, she published many studies of land subsidence related to fluid-pressure changes in areas throughout California and other areas in the Western U.S., which often had a focus on subsidence impacts to water-conveyance infrastructure. She is a member of the UNESCO Land Subsidence International Initiative, the recognized leader in promoting global land subsidence studies. At the Office of Quality Assurance, she serves as a technical-knowledge and point-of-contact resource to USGS scientists for all aspects of groundwater science. Michelle helps maintain and foster the exceptional quality of data and science for which the USGS is known and respected by helping scientists understand and comply with USGS and DOI policies, processes, and procedures, and by identifying and communicating technical advancements and risks.
Science and Products
Earthquakes-Rattling the Earth's Plumbing System
Optimal measurement of an ASR program to control land subsidence in Lancaster, California
Detection and measurement of land subsidence using global positioning system and Interferometric Synthetic Aperture Radar, Coachella Valley, California, 1998-2000
Houston-Galveston Bay area, Texas, from space; a new tool for mapping land subsidence
Hydraulic and mechanical properties affecting ground-water flow and aquifer-system compaction, San Joaquin Valley, California
Detection and measurement of land subsidence using Global Positioning System and interferometric synthetic aperture radar, Coachella Valley, California, 1996-98
Modeling residual aquifer-system compaction--Constraining the vertical hydraulic diffusivity of thick aquitards
Aquifer-system compaction and land subsidence: Measurements, analyses, and simulations – The Holly Site, Edwards Air Force Base, Antelope Valley, California
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Earthquakes-Rattling the Earth's Plumbing System
Hydrogeologic responses to earthquakes have been known for decades, and have occurred both close to, and thousands of miles from earthquake epicenters. Water wells have become turbid, dry or begun flowing, discharge of springs and ground water to streams has increased and new springs have formed, and well and surface-water quality have become degraded as a result of earthquakes. Earthquakes affectAuthorsMichelle Sneed, Devin L. Galloway, William L. CunninghamOptimal measurement of an ASR program to control land subsidence in Lancaster, California
No abstract available.AuthorsS.P. Phillips, Carl S. Carlson, L.F. Metzger, Michelle Sneed, Devin L. Galloway, Kenneth W. Hudnut, M. E. Ikehara, P.J. DillonDetection and measurement of land subsidence using global positioning system and Interferometric Synthetic Aperture Radar, Coachella Valley, California, 1998-2000
Land subsidence associated with ground-water-level declines has been recognized as a potential problem in Coachella Valley, California. Since the early 1920s, ground water has been a major source of agricultural, municipal, and domestic supply in the valley. Pumping of ground water resulted in water-level declines as large as 15 meters (50 feet) through the late 1940s. In 1949, the importation ofAuthorsMichelle Sneed, Sylvia V. Stork, Marti E. IkeharaHouston-Galveston Bay area, Texas, from space; a new tool for mapping land subsidence
Interferometric Synthetic Aperture Radar (InSAR) is a powerful new tool that uses radar signals to measure displacement (subsidence and uplift) of the Earth's crust at an unprecedented level of spatial detail and high degree of measurement resolution.The Houston-Galveston Bay area, possibly more than any other metropolitan area in the United States, has been adversely affected by land subsidence.AuthorsSylvia V. Stork, Michelle SneedHydraulic and mechanical properties affecting ground-water flow and aquifer-system compaction, San Joaquin Valley, California
This report summarizes hydraulic and mechanical properties affecting ground-water flow and aquifer-system compaction in the San Joaquin Valley, a broad alluviated intermontane structural trough that constitutes the southern two-thirds of the Central Valley of California. These values will be used to constrain a coupled ground-water flow and aquifer-system compaction model of the western San JoaquiAuthorsMichelle SneedDetection and measurement of land subsidence using Global Positioning System and interferometric synthetic aperture radar, Coachella Valley, California, 1996-98
Land subsidence associated with ground-water-level declines has been recognized as a potential problem in Coachella Valley, California. Since the early 1920s, ground water has been a major source of agricultural, municipal, and domestic supply in the valley, resulting in water-level declines as large as 15 meters (50 feet) through the late 1940s. In 1949, the importation of Colorado River water toAuthorsMichelle Sneed, Marti E. Ikehara, D. L. Galloway, Falk AmelungModeling residual aquifer-system compaction--Constraining the vertical hydraulic diffusivity of thick aquitards
No abstract available.AuthorsMichelle Sneed, Michael T. Pavelko, Devin L. GallowayAquifer-system compaction and land subsidence: Measurements, analyses, and simulations – The Holly Site, Edwards Air Force Base, Antelope Valley, California
Land subsidence resulting from ground-water-level declines has long been recognized as a problem in Antelope Valley, California. At Edwards Air Force Base (EAFB), ground-water extractions have caused more than 150 feet of water-level decline, resulting in nearly 4 feet of subsidence. Differential land subsidence has caused sinklike depressions and earth fissures and has accelerated erosion of theAuthorsMichelle Sneed, Devin L. Galloway - News