Fissure near Lucerne Lake along State Route 247 (visible in background), Mojave Desert, California. The localized subsidence in five areas near dry lake beds was caused by declining water levels in fine-grained (clay and silt) sediments. In the Mojave River and Morongo Groundwater Basins (fig.
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Fissure in the Mojave Desert
Fissure near Lucerne Lake along State Route 247 (visible in background), Mojave Desert, California. The localized subsidence in five areas near dry lake beds was caused by declining water levels in fine-grained (clay and silt) sediments. In the Mojave River and Morongo Groundwater Basins (fig.
Sacramento-San Joaquin Delta Land Subsidence
A map of subsidence in the Delta based on the leveling and observations of transmission-line foundations, circa 1930s-1990s. The subsidence increases stresses on the levee system, and failure of levees would cause salt water to move further up the Delta system by disrupting favorable gradients.
A map of subsidence in the Delta based on the leveling and observations of transmission-line foundations, circa 1930s-1990s. The subsidence increases stresses on the levee system, and failure of levees would cause salt water to move further up the Delta system by disrupting favorable gradients.
salinas_river.jpg
Picture of the Salinas River taken by webcam. USGS 11152500 SALINAS R NR SPRECKELS CA. Picture of the Salinas River taken by webcam. USGS 11152500 SALINAS R NR SPRECKELS CA.
Picture of the Salinas River taken by webcam. USGS 11152500 SALINAS R NR SPRECKELS CA. Picture of the Salinas River taken by webcam. USGS 11152500 SALINAS R NR SPRECKELS CA.
GAMA Public-supply Well (Deep Aquifer) Assessment Study Units
GAMA Public-supply Well (Deep Aquifer) Assessment Study UnitsThe GAMA program is a comprehensive assessment of statewide groundwater quality. The program is designed to help better understand and identify risks to groundwater resources. Groundwater is sampled at many locations across California in order to characterize its constituents and identify trends in groundwater quality.
GAMA Public-supply Well (Deep Aquifer) Assessment Study Units
GAMA Public-supply Well (Deep Aquifer) Assessment Study UnitsThe GAMA program is a comprehensive assessment of statewide groundwater quality. The program is designed to help better understand and identify risks to groundwater resources. Groundwater is sampled at many locations across California in order to characterize its constituents and identify trends in groundwater quality.
Post-fire Debris Flow
Debris Flow in Cable Canyon following the 2003 Old Fire in the San Bernardino Mountains, California.
Debris Flow in Cable Canyon following the 2003 Old Fire in the San Bernardino Mountains, California.
Map of study areas in Sonoma and Mendocino Counties.
Map of study areas in Sonoma and Mendocino Counties.Map of study areas and key geographic features in Sonoma and Mendocino Counties.
Map of study areas in Sonoma and Mendocino Counties.
Map of study areas in Sonoma and Mendocino Counties.Map of study areas and key geographic features in Sonoma and Mendocino Counties.
Anza Valley, CA
Groundwater is the sole source for water use to the rural community and two Native American tribes in the Cahuilla Valley and Terwilliger Valley groundwater basins, which are located approximately 35 miles southwest of Palm Springs, California.
Groundwater is the sole source for water use to the rural community and two Native American tribes in the Cahuilla Valley and Terwilliger Valley groundwater basins, which are located approximately 35 miles southwest of Palm Springs, California.
Aquifer Compaction
Fine-grained sediments (clays and silts) within an aquifer system are the main culprits in land subsidence due to groundwater pumping. Fine-grained sediments are special because they are composed of platy grains. When fine-grained sediments are originally deposited, they tend to be deposited in random orientations.
Fine-grained sediments (clays and silts) within an aquifer system are the main culprits in land subsidence due to groundwater pumping. Fine-grained sediments are special because they are composed of platy grains. When fine-grained sediments are originally deposited, they tend to be deposited in random orientations.
Map of study area, Yucca Valley, California.
Map of study area, Yucca Valley, California.
Map of study area, Yucca Valley, California.
Land Subsidence in the San Joaquin Valley
Approximate point of maximum subsidence in the San Joaquin Valley, California. Land surface subsided ~9 m from 1925 to 1977 due to aquifer-system compaction. Signs on the telephone pole indicate the former elevations of the land surface in 1925 and 1955.
Photograph by Richard Ireland, U.S. Geological Survey
Approximate point of maximum subsidence in the San Joaquin Valley, California. Land surface subsided ~9 m from 1925 to 1977 due to aquifer-system compaction. Signs on the telephone pole indicate the former elevations of the land surface in 1925 and 1955.
Photograph by Richard Ireland, U.S. Geological Survey
Hooe Building
The Hooe Building
Location
- Address: 16th Street NW, Washington, D.C., at the corner of 16th and H Streets NW.
- Current Reference: The site is now known as the Hooe Building (Historical).
Historical Background
The Hooe Building
Location
- Address: 16th Street NW, Washington, D.C., at the corner of 16th and H Streets NW.
- Current Reference: The site is now known as the Hooe Building (Historical).
Historical Background