Creating mathematical expressions to represent a simplified view of real-world systems.
Computer simulation of reservoir depletion and oil flow from the Macondo well following the Deepwater Horizon blowout [ More info] This model estimates, by simulation, the reservoir pressure, flow rate, and volume of oil discharged, and the report discusses the uncertainty in the estimates.
Drought and deluge: Effects of recent climate variability on groundwater levels in eastern Arkansas [ More info] Water levels in wells completed in the Mississippi River Valley alluvial aquifer and the Sparta aquifer in eastern Arkansas respond to variability associated with annual precipitation.
Ground-water flow and other computer simulations for Utah [ More info] Identifies computer models in USGS publications developed to study ground water for many areas of Utah.
Impacts of Low-Flow and Stream-Temperature Changes on Endangered Atlantic Salmon - Current Research [ More info] Recent physical changes over time, including trends toward earlier snowmelt runoff, decreasing river ice, and increasing spring water temperatures, may affect salmon populations; we want to know how important these effects are.
Land-use and land-cover scenarios and spatial modeling at the regional scale [ More info] Complex geographic information can be analyzed with mathematical models to show us the spatial patterns of human building, vegetation growth, and other landscape characteristics that may result from environmental changes we may expect in the future.
Mapping, monitoring, and modeling Western Gateway Community landscape dynamics [ More info] Geospatial analysis of factors affecting communities that are adjacent to Federal lands, especially those lands subject to varying public interest and visitation.
National Handbook of Recommended Methods for Water Data Acquisition -- Chapter 11 - Water Use [ More info] Provides standards and guidance for measuring, estimating, collecting, and analyzing water-use data. Includes brief descriptions of water-use activities, commonly used water-use terminology, and approaches and methods used in estimating water use.
Possible effects of groundwater pumping on surface water in the Verde Valley, Arizona [ More info] We applied a groundwater model to simulate effects of groundwater pumping and artificial recharge on surface water in this area. Results show effects of pumping or recharge on streamflow.
Regional assessments of the Nation's water quality--Improved understanding of stream nutrient sources through enhanced modeling capabilities [ More info] Studies of the sources, transport, and fate of nutrients in the streams of six major regions of the conterminous United States.
Report of the Community Sediment Transport Modeling Workshop [ More info] Report on workshop to explore a community approach to improving deterministic models of sediment transport in coastal seas, estuaries, and rivers.
Alphabetical Index of Topics
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