Books
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 1,000 books authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
Filter Total Items: 970
Alaska national hydrography dataset positional accuracy assessment study
Initial visual assessments
Wide range in the quality of fit between features in NHD and these new image sources.
No statistical analysis has been performed to actually quantify accuracy
Determining absolute accuracy is cost prohibitive (must collect independent, well defined test points)
Quantitative analysis of relative positional error is feasible.
Authors
Samantha Arundel, Kristina H. Yamamoto, Eric Constance, Kim Mantey, Jeremy Vinyard-Houx
An integrated land change model for projecting future climate and land change scenarios
Climate change will have myriad effects on ecosystems worldwide, and natural and anthropogenic disturbances will be key drivers of these dynamics. In addition to climatic effects, continual expansion of human settlement into fire-prone forests will alter fire regimes, increase human vulnerability, and constrain future forest management options. There is a need for modeling tools to support the sim
Authors
Michael Wimberly, Terry L. Sohl, Aashis Lamsal, Zhihua Liu, Todd Hawbaker
Current perspectives in contaminant hydrology and water resources sustainability
Human society depends on liquid freshwater resources to meet drinking, sanitation and hygiene, agriculture, and industry needs. Improved resource monitoring and better understanding of the anthropogenic threats to freshwater environments are critical to efficient management of freshwater resources and ultimately to the survival and quality of life of the global human population. This book helps ad
Authors
Paul M. Bradley
ʻŌhiʻa Lehua rainforest: born among Hawaiian volcanoes, evolved in isolation: the story of a dynamic ecosystem with relevance to forests worldwide
In the early 1970s, a multidisciplinary team of forest biologists began a study of Hawaiian ecosystems under the International Biological Program (IBP). Research focus was on the intact native ecosystems in and around Hawai'i Volcanoes National Park, in particular the ʻŌhiʻa Lehua rainforest. Patches of dead ʻŌhiʻa stands had been reported from the windward slopes of Mauna Loa and Mauna Kea. Subse
Authors
Dieter Mueller-Dombois, James D. Jacobi, Hans Juergen Boehmer, Jonathan P. Price
Trails through time: A geologist's guide to Jefferson County open space parks
Introduction
Jefferson County straddles one of the most conspicuous and important geographic and geologic boundaries in westernNorth America, the eastern flank of the Rocky Mountains. To the east you can travel 1,100 miles across Great Plains andCentral Lowlands before you sight the western foothills of the Appalachians. If you travel in the other direction you willcross or skirt mountain range af
Authors
John C. Reed
Sediment Transport from Urban, Urbanizing, and Rural Areas in Johnson County, Kansas, 2006-08
1. Studies have commonly illustrated that erosion and sediment transport from construction sites is extensive, typically 10-100X that of background levels.
2. However, to our knowledge, the affects of construction and urbanization have rarely been assessed (1) since erosion and sediment controls have been required at construction sites, and (2) at watershed (5-65 mi2) scales. This is primarily b
Authors
Casey J. Lee
Empirical flow parameters : a tool for hydraulic model validity
The objectives of this project were (1) To determine and present from existing data in Texas, relations between observed stream flow, topographic slope, mean section velocity, and other hydraulic factors, to produce charts such as Figure 1 and to produce empirical distributions of the various flow parameters to provide a methodology to "check if model results are way off!"; (2) To produce a statis
Authors
William H. Asquith, Thomas E. Burley, Theodore G. Cleveland
The effects of disease-related mortality on the recruitment of young-of-year smallmouth bass in the Susquehanna River Basin, Pennsylvania
No abstract available.
Authors
Geoffrey Smith, Vicki Blazer, Heather Walsh, Luke R. Iwanowicz, Clifford E. Starliper, Adam Sperry
Trends in landscape and vegetation change and implications for the Santa Cruz Watershed
Monitoring and characterizing the interactive effects of land use and climate on land surface processes is a primary focus of land change science, and of particular concern in arid Wells Distribution in Shallow Groundwater Areas Pumping Trends Increase Streamflow Extent Declines 27 environments where both landscapes and livelihoods can be impacted by short-term climate variability. Using a multi-o
Authors
Miguel L. Villarreal, Laura M. Norman, Robert H. Webb, Raymond M. Turner
Telemetry techniques: A user guide for fisheries research
Telemetry provides a powerful and flexible tool for studying fish and other aquatic animals, and its use has become increasingly commonplace. However, telemetry is gear intensive and typically requires more specialized knowledge and training than many other field techniques. As with other scientific methods, collecting good data is dependent on an understanding of the underlying principles behind
IOOS modeling subsystem: vision and implementation strategy
Numerical modeling is vital to achieving the U.S.
IOOS® goals of predicting, understanding and adapting
to change in the ocean and Great Lakes. In the next
decade IOOS should cultivate a holistic approach to
coastal ocean prediction, and encourage more balanced
investment among the observing, modeling and
information management subsystems. We believe the
vision of a prediction framework dri
Authors
Leslie Rosenfeld, Yi Chao, Richard P. Signell
Priorities for IOOS® Data Management and Communications (DMAC)
Dramatic increases in the volume of online data and rapid advances in information technology have transformed many aspects of our society. In the coastal ocean, the amount of data is also growing dramatically due to new sensor and modeling technologies. Lagging behind this deluge of ocean data, however, is an effective framework of standards, protocols, tools and culture needed to transform the wa
Authors
Corrine Alexander, Joan Thomas, K. Benedict, W. Johnson, R. Morrison, J. Andrechik, E. Stabenau, M. Gierach, K. Casey, Richard P. Signell, H. Norris, R. Proctor, K. Kirby, D. Snowden, J. de La Beaujardière, E. Howlett, S. Uczekaj, K. Narasimhan, E. Key, M. Trice, J. Fredericks