Physical scientists at Kenai Fjords National Park in Alaska have been using remote sensing methods to monitor an unnamed glacial ice-dammed lake (IDL) and the subsequent glacial lake outburst floods (GLOFs) that regularly occur at Bear Glacier to understand the timing, frequency, and drivers that lead to GLOFs.
Ground based / sensor web / web cam
Many prehistoric sites located throughout Alaska are surface scatters of lithic (rock) debris, either remaining exposed since occupation or re-exposed due to erosion. Due to their open nature, these sites are often interpreted to lack much of their original context and integrity.
Alaska is the only Arctic State in the Nation. The Arctic environment presents some unique challenges to living, working, and operating, including a lack of road infrastructure, high costs of shipping freight, and seasonal daylight limitations during the winter. The sun drops below the horizon in November and does not rise above the horizon until mid-February.
When nightly migration starts or ends, birds transition vertically through the airspace where there is the potential for collision with anthropogenic structures.
Carbonate precipitation can occur where groundwater enters lakes and supplies chemicals missing from the lake, creating carbonate mounds called tufa mounds or microbialites. These precipitates can often be associated with microbes that either create micro-environments that encourage precipitation or act as templates for precipitation.
To validate the quality of light detection and ranging (lidar) data collected for the 3D Elevation Program (3DEP), the USGS uses methods detailed in “Accuracy Standards for Digital Geospatial Data” developed by the American Society for Photogrammetry and Remote Sensing (ASPRS).
Low-lying island environments, such as the Majuro Atoll in the Republic of the Marshall Islands, are particularly vulnerable to coastal flooding (inundation) whether the increased water levels are from episodic events (storm surge, wave run-up, king tides) or from chronic conditions (long-term sea-level rise). Land elevation is the primary environmental variable that determines exposure to inundation in coastal settings.
During 2019, the Avian Radar Project surveyed the migration of birds and bats in the Detroit, Michigan, area using mobile avian radar units.
BOR is a key partner in the Trinity River Restoration Program (TRRP), located in far northern California. Remote sensing for the TRRP includes annual high-resolution aerial photography (0.5-foot pixel resolution), which provides a standard point of view for detecting morphological and vegetation changes to the river channel and floodplain.
The USGS National Land Imaging Program (NLIP) has built a long-term capacity to collect and analyze land imaging user requirements to advance the Nation’s operational and science objectives and better serve the land imaging community. The USGS documents the land imaging requirements of U.S.