Lidar (terrestrial or bathymetric)

Unmanned Aircraft Systems-based Remote Sensing of River Discharge Using Bathymetric Lidar and Thermal Particle Image Velocimetry

Submitted by atripp on Mon, 04/06/2020 - 11:24

The USGS is developing innovative technologies and approaches for measuring river discharge using remotely sensed data. Given the expense associated with remote sensing from conventional aerial platforms (e.g., helicopter, airplane), unmanned aircraft systems (UAS) offer hydrographers a lower cost alternative for data acquisition.

3D Elevation Program Status

Submitted by atripp on Thu, 04/02/2020 - 10:55

The goal of the 3D Elevation Program (3DEP) is to complete acquisition of nationwide lidar (Interferometric Synthetic Aperture Radar (IfSAR) in Alaska) in 8 years to provide the first-ever national baseline of consistent high-resolution elevation data—both bare earth and 3D point clouds—collected in a timeframe of less than a decade.

Using Lidar to Identify Forest Canopy Gaps in Riparian Forests

Submitted by atripp on Wed, 04/01/2020 - 14:24

The USGS Upper Midwest Environmental Sciences Center is working with the U.S. Army Corps of Engineers to identify forest canopy gaps in riparian forests along the Mississippi and Illinois Rivers. The goal is to help understand the factors affecting floodplain forest regeneration and how these factors might be managed.

Inundation Exposure Assessment for Majuro Atoll, Republic of the Marshall Islands

Submitted by atripp on Wed, 04/01/2020 - 14:15

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.

Land of 12 Million Wetland Types

Submitted by atripp on Wed, 04/01/2020 - 08:28

Under the leadership of Dr. Steve Kloiber (steve.kloiber@state.mn.us), the Minnesota Department of Natural Resources (MN DNR) has completed a 10-year effort to update the State’s National Wetlands Inventory (NWI) digital maps using new remote sensing imagery and geospatial technologies to produce a clearer, updated, more accurate picture of Minnesota’s wetlands, lakes, rivers, and streams.

Near-field Remote Sensing of Streamflow in Alaska

Submitted by atripp on Tue, 12/11/2018 - 11:52

The USGS presently operates 102 streamgaging stations distributed throughout Alaska. As many of these stations are quite remote, considerable effort is needed to collect periodic measurements and maintain gages. Thus, developing remote sensing methods for measuring streamflow in this vast, largely inaccessible State is valuable for many reasons.

A Long-term Sediment Budget for a Rapidly Eroding Mined Landscape

Submitted by atripp on Tue, 12/11/2018 - 11:41

Archival aerial stereo-photographs are a source of information that can be used to create historical topography models for rapidly changing landscapes. Researchers completed a pilot study in Malakoff Diggins State Historic Park (MDSHP), which was once the largest hydraulic mine (1.6 square kilometers) in the Sierra Nevada of California. Legacy impacts in these mined landscapes include remnant steep exposures of highly erodible Eocene-aged auriferous sediments.