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Search indexed USGS publications on groundwater, aquifers, geologic maps, mineral resources and earthquakes. Explore source records by subject and place.

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At least 217 records · Page 12Linked to original sources
USGS2012

LiDAR - An emerging tool for geological applications

Over the past five to ten years the use and applicability of light detection and ranging (LiDAR) technology has increased dramatically. As a result, more and more LiDAR data now are being collected across the country for a wide range of applications, and LiDAR currently is the technology of choice for high resolution terrain model creation, 3-D city and infrastructure modeling, forestry, and a wide range of scientific applications. LiDAR is a key technology for geological applications both within and outside the U.S. Geological Survey, and efforts are underway to try to collect high resolution LiDAR data for the entire United States (https://pubs.usgs.gov/fs/2012/3089/pdf/fs2012-3089.pdf).

Outcrop: The Newsletter of the Rocky Mountain Asso↗
USGS2013

A simple humane method to euthanize a sea turtle

Increased interconnectedness, communication, and demands of society require that wildlife professionals make every effort to consider animal welfare when handling animals. The challenge can be daunting, particularly when a wild animal needs to be euthanized. In some cases, biologists are in remote areas under conditions that may be less than ideal to properly and swiftly dispatch an animal, either because of a lack of proper supplies or veterinary training. Societal demands for consideration of animal welfare are not limited to wildlife professionals. Native cultures, fishermen and hunters have traditional methods of capturing or killing wildlife that are now under increasing public scrutiny. A current example is in Australia where aborigines were criticized for the practice of dispatching sea turtles by throwing a cement block at the animals’ heads resulting in negative public reaction (Queensland Times 2010).

Marine Turtle Newsletter↗
USGS2008

Bjørn Bølviken - 2008 IAGC Vernadsky medalist

Prof. Bjørn Bølviken, 80, formerly with the Geological Survey of Norway, was the 2nd recipient of the IAGC's Vernadsky Medal. The IAGC Vernadsky Medal is awarded biennially to a single person for a distinguished record of scientific accomplishment in geochemistry over the course of a career. Dr. David Smith of the US Geological Survey and Leader of the IAGC Working Group on ‘Global Geochemical Baselines’ was the citationist for the award.

Newsletter of the International Association of Geo↗
USGS2013

Development of MODFLOW-USG: an un-structured grid version of MODFLOW

MODFLOW was revolutionary when it was first unveiled by the USGS in 1988, and since then it has been the most widely used groundwater flow modeling program in the world. MODFLOW’s simulation capabilities have evolved substantially since its initial release and it has been an inspiration for more comprehensive analysis simulators including surface-water/groundwater interaction models (e.g., GSFLOW, SWF, MODHMS, ISGW), flow and transport analysis simulators (e.g., MT3D, MODFLOWSURFACT, MODFLOW-T), and saltwater intrusion models (e.g., SEAWAT).

International Association of Hydrogeologists Newsl↗