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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.
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Upper Klamath Basin Landsat Image for November 8, 2004: Path 45 Rows 30 and 31 Upper Klamath Basin Landsat Image for November 8, 2004: Path 45 Rows 30 and 31
This image is a mosaic of Landsat-5 images of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing mission to provide quality remote sensing data in support of...
Authors
Daniel T. Snyder
Upper Klamath Basin Landsat Image for October 16, 2004: Path 44 Row 31 Upper Klamath Basin Landsat Image for October 16, 2004: Path 44 Row 31
This subset of a Landsat-5 image shows part of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing mission to provide quality remote sensing data in support of...
Authors
Daniel T. Snyder
Upper Klamath Basin Landsat Image for October 22, 2006: Path 44 Row 31 Upper Klamath Basin Landsat Image for October 22, 2006: Path 44 Row 31
This subset of a Landsat-5 image shows part of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing mission to provide quality remote sensing data in support of...
Authors
Daniel T. Snyder
Upper Klamath Basin Landsat Image for October 29, 2006: Path 45 Rows 30 and 31 Upper Klamath Basin Landsat Image for October 29, 2006: Path 45 Rows 30 and 31
This image is a mosaic of Landsat-5 images of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing mission to provide quality remote sensing data in support of...
Authors
Daniel T. Snyder
Upper Klamath Basin Landsat Image for October 7, 2004: Path 45 Rows 30 and 31 Upper Klamath Basin Landsat Image for October 7, 2004: Path 45 Rows 30 and 31
This image is a mosaic of Landsat-5 images of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing mission to provide quality remote sensing data in support of...
Authors
Daniel T. Snyder
Upper Klamath Basin Landsat Image for September 20, 2006: Path 44 Row 31 Upper Klamath Basin Landsat Image for September 20, 2006: Path 44 Row 31
This subset of a Landsat-5 image shows part of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing mission to provide quality remote sensing data in support of...
Authors
Daniel T. Snyder
Upper Klamath Basin Landsat Image for September 21, 2004: Path 45 Rows 30 and 31 Upper Klamath Basin Landsat Image for September 21, 2004: Path 45 Rows 30 and 31
This image is a mosaic of Landsat-5 images of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing mission to provide quality remote sensing data in support of...
Authors
Daniel T. Snyder
Upper Klamath Basin Landsat Image for September 27, 2006: Path 45 Rows 30 and 31 Upper Klamath Basin Landsat Image for September 27, 2006: Path 45 Rows 30 and 31
This image is a mosaic of Landsat-5 images of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing mission to provide quality remote sensing data in support of...
Authors
Daniel T. Snyder
Upper Klamath Basin Landsat Image for September 30, 2004: Path 44 Row 31 Upper Klamath Basin Landsat Image for September 30, 2004: Path 44 Row 31
This subset of a Landsat-5 image shows part of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing mission to provide quality remote sensing data in support of...
Authors
Daniel T. Snyder
Urban development results in stressors that degrade stream ecosystems Urban development results in stressors that degrade stream ecosystems
In 2003, eighty-three percent of Americans lived in metropolitan areas, and considerable population increases are predicted within the next 50 years. Nowhere are the environmental changes associated with urban development more evident than in urban streams. Contaminants, habitat destruction, and increasing streamflow flashiness resulting from urban development have been associated with...
Authors
Amanda H. Bell, James F. Coles, Gerard McMahon, Michael D. Woodside
Use of classes based on redox and groundwater age to characterize the susceptibility of principal aquifers to changes in nitrate concentrations, 1991 to 2010 Use of classes based on redox and groundwater age to characterize the susceptibility of principal aquifers to changes in nitrate concentrations, 1991 to 2010
The National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey is using multiple approaches to measure and explain trends in concentrations of nitrate in principal aquifers of the United States. Near decadal sampling of selected well networks is providing information on where long-term changes in nitrate concentrations have occurred. Because those studies do not...
Authors
P.B. McMahon
Use of Dry Tortugas National Park by threatened and endangered marine turtles Use of Dry Tortugas National Park by threatened and endangered marine turtles
Satellite and acoustic tracking results for green turtles, hawksbills, and loggerheads have revealed patterns in the proportion of time that tagged turtles spend within various zones of the park, including the RNA. Green turtles primarily utilize the shallow areas in the northern portion of the park. Hawksbills were mostly observed near Garden Key and loggerheads were observed throughout...
Authors
Kristin M. Hart, Ikuko Fujisaki, Autumn R. Sartain-Iverson