United States of America

Filter Total Items: 3,023
Date published: October 26, 2019
Status: Active

Regional Differences in the Effects of Surface Mining

Because the topographic change inventory has near-national coverage, comparisons can be made among broad regions. This figure shows a set of five Level III ecoregions that were used as a basis for regional comparisons of topographic change.

Contacts: Dean Gesch
Date published: October 26, 2019
Status: Active

Hydrologic Effects

Because the shape of the land exerts strong control over the collection and flow of surface water, changes to the topography can have a significant effect on local drainage conditions. The figure below demonstrates how the local surface drainage features have been altered as a result of surface mining operations.

Contacts: Dean Gesch
Date published: October 26, 2019
Status: Active

Comparison with Land Cover Status and Trends Data

The topographic changes detected in this study usually have a corresponding land cover change. To examine this relationship more closely, features in the topographic change inventory were compared with data from an ongoing study of the status and trends of land cover in the United States. The status and trends project uses a sampling-based approach in which land cover maps and change products...

Contacts: Dean Gesch
Date published: October 26, 2019
Status: Active

Error Sources, Uncertainty, Limitations, and Uses

In a study such as this one, with diverse input datasets that cover a broad area, data characteristics and quality can have spatially varying effects on derived information. In the context of data processing methods, unique characteristics of both the NED and SRTM data had to be accounted for in the processing approach to reduce errors of commission. While it is desirable to have a final...

Contacts: Dean Gesch
Date published: October 24, 2019
Status: Active

Herring River Water Quality

The U.S. Geological Survey (USGS) New England Water Science Center installed, operated, and maintained surface water-quality sites at the Chequessett Neck Road dike on the Herring River from November 2015 through September 2018.

Date published: October 24, 2019
Status: Active

Short-term Induced Seismicity Models

  

Date published: October 24, 2019
Status: Active

United States - Lower 48

Seismic Hazard maps and site-specific data for the U.S. lower 48 states.

Date published: October 24, 2019
Status: Active

USGS Streamgaging Network

The USGS Groundwater and Streamflow Information Program supports the collection and (or) delivery of both streamflow and water-level information for more than 8,500 sites and water-level information alone for more than 1,700 additional sites. The data are served online—most in near realtime—to meet many diverse needs.

Attribution: Water Resources
Date published: October 23, 2019
Status: Active

San Francisco Bay Area – SF Peninsula (BALT4) Site near Pacifica, CA

Recent Conditions

The instruments for this site were installed in the winter of 2012 and are used to monitor and detect changes in local conditions.  Soil water content and ground water pressure are monitored at two nests on the same hillslope.  Data for the site include:

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Contacts: Brian Collins
Date published: October 23, 2019
Status: Active

San Francisco Bay Area – SF Peninsula (BALT3) Site near Brisbane, CA

Recent Conditions

The instruments for this site were installed in the summer of 2011 and are used to monitor and detect changes in local conditions.  Soil water content and ground water pressure are monitored at two nests on the same hillslope.  Data for the site include:

  • ...
Contacts: Brian Collins
Date published: October 23, 2019
Status: Active

Alaska

Probabilistic seismic hazard maps have been prepared for Alaska portraying ground motion values (peak ground acceleration and spectral amplitude at periods of 0.2, 0.3 and 1.0 seconds) at probabilities of exceedance of 2% and 10% in 50 years. Preparation of these maps followed the same general strategy as that followed for the U.S.G.S. seismic hazard maps of the contiguous United States,...

Date published: October 23, 2019
Status: Active

San Francisco Bay Area – Marin County (BALT2) Site near San Rafael, CA

Recent Conditions

The instruments for this site were installed in the winter of 2010 and are used to monitor and detect changes in local conditions.  Soil water content and ground water pressure are monitored at two nests on the same hillslope.  Data for the site include:

  • ...
Contacts: Brian Collins