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Biological and physical processes
All continuing activities, functions, and phenomena associated with organisms and non-living matter.
Subtopics:
Atmospheric and climatic processes (166 items)
Ecological processes (100 items)
Fires (24 items)
Geologic processes (314 items)
Geochemical processes (17 items)
Ocean processes (43 items)
Coastal processes (32 items)
Estuarine processes (2 items)
Physiological processes (8 items)
Hydrologic processes (250 items)
Evolution (1 items)
Impact cratering (1 items)
Results 31 - 40 of 741 listed alphabetically [list by similarity]
PDF Algal toxins [More info]
Chapter of Field Manual of Wildlife Diseases on algal toxins, red tide toxins, phycotoxins, dinoflagellates, cyanobacterium, and bird mortality due to algal toxicosis.
Amargosa Desert research site [More info]
Online reports, site description and photographs of the Amargosa Desert research site monitoring low level radioactive waste.
America's volcanic past - volcanic highlights and features [More info]
Links to volcanism, volcanic history, volcanic rocks, and general geology by state, by region, national parks and national monuments and a brief introduction to volcanism around the U.S. entitled: Windows into the past.
An Overview of Historical Channel Adjustment and Selected Hydraulic Values in the Lower Sabine and Lower Brazos River Basins, Texas and Louisiana [More info]
How has the channel shape and path changed in response to reservoirs and other human disturbances affecting the streamflow?
An overview of coastal land loss with emphasis on the southeastern United States [More info]
Comprehensive background information on coastal land loss, discussing the influence of waves and storms, the intrinsic characteristics of the shoreline materials, and the role of human activities.
Annual hydrologic data report of Pennsylvania [More info]
Online annual reports (since 1999) documenting hydrologic data for Pennsylvania gathered from USGS surface water and ground water data-collection networks and information on ordering paper copies of previous years.
PDF Annual peak streamflow and ancillary data for small watersheds in central and western Texas [More info]
Estimates of annual peak-streamflow frequency are needed for flood-plain management, assessment of flood risk, and design of structures, such as roads, bridges, culverts, dams, and levees.
PDF Application of the SPARROW watershed model to describe nutrient sources and transport in the Missouri River Basin [More info]
Maps and diagrams showing how the mathematical model predicts the distribution of various pollutants within a large watershed.
PDF Assessing carbon stocks, carbon sequestration, and greenhouse-gas fluxes in ecosystems of the United States under present conditions and future scenarios [More info]
Congress asked us (in the Energy Independence and Security Act of 2007) to figure out how to assess the effects of carbon storage, sequestration, and greenhouse gas fluxes in our ecosystems. Here's how we plan to do that.
PDF Assessing the Vulnerability of Public-Supply Wells to Contamination: Central Valley Aquifer System near Modesto, California [More info]
Using ground-water geochemical analyses, and mathematical models, the factors affecting the quality of public water supply were identified as pumping schedule, screened interval, past land use within the recharge area, and natural geochemical conditions.
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