Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
Filter Total Items: 5326
Estuary-wide mitigation options for port development in Tampa Bar, Florida
No abstract available.
Authors
Steve Dial, Millicent L. Quammen, Don Deis, James B. Johnston
Landsat-faciliated vegetation classification of the Kenai National Wildlife Refuge and adjacent areas, Alaska
A Landsat-based vegetation map was prepared for Kenai National Wildlife Refuge and adjacent lands, 2 million and 2.5 million acres respectively. The refuge lies within the middle boreal sub zone of south central Alaska. Seven major classes and sixteen subclasses were recognized: forest (closed needleleaf, needleleaf woodland, mixed); deciduous scrub (lowland and montane, subalpine); dwarf scrub
Authors
Stephen S. Talbot, M.B. Shasby, T.N. Bailey
Comparison of fire fuel maps produced using MSS and AVHRR data
The fuel information, in support of the Bureau of Land Management's (BLM) national fire program, has been obtained through the manila interpretation of Landsat multi-spectral scanner images and digital image analysis of Advanced Very High Resolution Radiometer (AVHRR) data. The BLM, in cooperation with the Earth Resources Observation Systems Data Center, determined that the accuracy (approximatel
Authors
Wayne A. Miller, David C. Johnston
Change detection in rangeland environments using Landsat MSS data: A quantitative approach
A range forage utilization study on the Crow Creek Indian Reservation in central South Dakota provided the opportunity to use Landsat multispectral scanner (MSS) data for examining range condition trends. A procedure was developed to compare change in spectral reflectance over time for polygon areas, defined by resource type within management units. A t-test was used to evaluate changes in brigh
Authors
David C. Johnston, Robert H. Haas
Updating range surveys using a geographic information system
A spatial database was developed for the Fort Berthold Indian Reservation in North Dakota to demonstrate the use of a geographic information system for natural resource management. A key component of the digital database was a detailed soil survey. Range site boundaries were derived by aggregating soil mapping units on the basis on interpretations from the published soil surveys. The problem wa
Authors
Jeffery C. Eidenshink, David C. Sjaastad
Interim program for land cover mapping in Alaska utilizing Landsat digital data
The enactment of the Alaska National Interest Lands Conservation Act (ANILCA) in 1980 imposed mandates on all major land management agencies in Alaska to prepare comprehensive resource and management plans to assess wildlife habitat, oil and gas exploration and development, wild and scenic river, land disposals, timber production, and archaeological and cultural resources, To meet these objective
Authors
Mark Shasby, David Carneggie, Leonard Gaydos, Katherine Fitzpatrick-Lins, Donald Lauer, Vincent Ambrosia, Susan Benjamin
New horizons in remote sensing for forest and range resource management
Forest and range resource scientists were among the first to recognize the potential of aircraft and satellite remote sensing for management of timber, forage, water, and wildlife resource. Today, data from a variety of sensor systems are being put to practical use for inventorying, monitoring, and assessing forest and range resources. In the future, improved sensor systems providing new kinds o
Authors
D. T. Lauer
Using satellite data for mapping and monitoring vegetation resources
No abstract available.
Authors
R. H. Haas
Application of a ground-water flow digital model in evaluating alternate dewatering systems in the Río Grande de Arecibo alluvial valley, Puerto Rico
No abstract available.
Authors
Vicente Quinones-Aponte, Heriberto Torres-Sierra
Assessment and monitoring of sedimentation in the Aswan High Dam Reservoir using Landsat imagery
No abstract available.
Authors
S. E. Smith, K. H. Mancy, A. F. A. Latif, Eugene A. Fosnight
Water quality and chemical evolution of ground water within the north coast limestone aquifers of Puerto Rico
Waters within the north coastal limestoneaquifers are suitable for public supply, industrial and agricultural uses. For the artesian aquifer and the updip parts of the watertable aquifer, calcium and bicarbonate are the dominant ionic species with total dissolved solids and chloride concentrations below 500 and 250 mg/L, respectively. In coastal areas of thewater table aquifer, where a freshwater-
Authors
Angel J. Roman-Mas, Roger W. Lee
Fluorine in Colorado oil shale
Oil shale from the lower part of the Eocene Green River Formation in the Piceance Creek Basin, Colorado, averages 0.13 weight percent fluorine, which is about twice that found in common shales, but is the same as the average amount found in some oil shales from other parts of the world. Some fluorine may reside in fluorapatite; however, limited data suggest that cryolite may be quantitatively more
Authors
John R. Dyni