This paper presents a very efficient method for vectorizing and labeling very large raster hypsographic map images. By extending the contour tree (Freeman and Morse, 1967) to a contour graph, open contour lines and carrying contour lines can be handled. The ambiguities of the topological relationships among contour lines are resolved using map structure information, i.e., elevation tags and ind...

Woodland vernal pools are important, small, cryptic, ephemeral wetland ecosystems that are vulnerable to a changing climate and anthropogenic influences. To conserve woodland vernal pools for the state of Michigan USA, vernal pool detection and mapping methods were sought that would be efficient, cost-effective, repeatable and accurate. Satellite-based L-band radar data from the high (10 m) res...

Mangrove ecosystems help mitigate climate change, are highly biodiverse, and provide critical goods and services to coastal communities. Despite their importance, anthropogenic activities are rapidly degrading and deforesting mangroves world-wide. Madagascar contains 2% of the world’s mangroves, many of which have undergone or are starting to exhibit signs of widespread degradation and deforest...

Butler, L. Carter, J. Gillis-Davis, J. Goswami, E. Heggy, R. Kirk, T. Misra, S. Nozette, M. Robinson, R. K. Raney, T. Thompson, B. Thomson, E. Ustinov 1. Lunar and Planetary Institute, Houston TX 77058 ([email protected]) 2. Applied Physics Laboratory, Laurel MD 20723 3. NRAO, Socorro NM 4. NASM, Washington DC 5. Univ. Hawaii, Honolulu HI 96822 6. ISRO, Bangalore, India 7. JPL, Pasadena CA 8....

ConUtriuUing subject-maner experts and reviewers Included: Bill Arnold PA SZ flow issues Scott Bennett WPD Waste package and design-related FEPs Jim Houseworth UZ UZ flow issues and fracture-related FEPs Dwayne Kicker Repository Modeling Rockfall-related FEPs Dennis O'Leary USGS Faulting-related and tectonic-related FEPs Carl Stepp Site Integration Tectonic-related, faulting-related, and seismi...

BPA project number: 20056 Contract renewal date (mm/yyyy): Multiple actions? Business name of agency, institution or organization requesting funding Business acronym (if appropriate) USGS-WFRC Short description RNase protection technology will be used to survey the genetic types of IHN virus throughout the Columbia Basin, to identify sources of disease outbreaks, and to infer viral traffic patt...

C. S. Edwards, J. L. Bandfield, P. R. Christensen, and R. L. Fergason. Arizona State University, School of Earth and Space Exploration, Mars Space Flight Facility, PO BOX 876305, Tempe, AZ, 85287-6305. [email protected], University of Washington, Department of Earth and Space Sciences, Johnson Hall 070, Box 351310, 4000 15th Avenue NE, Seattle, WA 98195-1310. USGS Astrogeology Researc...

First posted February 28, 2023 For additional information, contact: Director, Oklahoma-Texas Water Science Center U.S. Geological Survey 1505 Ferguson Lane Austin, TX 78754–4501 Contact Pubs Warehouse Floods are one of the most frequent and expensive natural disasters that occur across United States. Rapid, high-water events in local areas––flash floods––are especially difficult for emergency m...

First posted February 16, 2021 For additional information, contact: Director, South Atlantic Water Science CenterU.S. Geological Survey1770 Corporate Drive, Suite 500Norcross, GA 30093Contact Pubs Warehouse The U.S. Survey (USGS) National Water-Use Project strives to report water-use estimates using the best available information for period of estimates. on water used irrigation activities vari...

First posted October 25, 2022 For additional information, contact: Program Manager, Next Generation Water Observing SystemWater Resources Mission AreaU.S. Geological Survey12201 Sunrise Valley DriveReston, VA 20192Contact Pubs Warehouse Groundwater-stream connectivity across mountain watersheds is critical for supporting streamflow during dry times and keeping streams cool warm times, yet U.S. ...