|
|
Using long-term data records, this project is focused on two problems of importance to water resources managers. First, long-term streamflow records are being used to a) identify broad regional to national trends in floods and low-flows and relate them to possible causes (climate change, water management changes, land-cover changes, and ground-water level change) and b) determine whether there are patterns that relate to watershed size or climate characteristics. It is often stated in the popular press and in official publications on global climate change that we can expect increased variability, including larger and/or more frequent floods, and deeper and longer droughts, as a result of greenhouse warming. This...
|
Our research focuses on developing methods to analyze volcano-hydrothermal systems and on the application of these methods to particular volcanic systems in the western United States. Specific research questions include (1) What are the modes of heat and mass transport from magma to the shallow subsurface? (2) What are the pressure, temperature, and fluid-saturation conditions between magma and the land surface? (3) What controls the permeability of volcanoes? How does it vary in space and time? What role do temporal variations in permeability play in the evolution of volcanogenic hydrothermal systems and episodes of volcanic unrest? (4) How well-coupled are various fluid flow, transport, and mechanical deformation...
|
The NRP had its beginnings in the late 1950's. Since that time, the program has grown to encompass a broad spectrum of scientific investigations. The sciences of hydrology, mathematics, chemistry, physics, ecology, biology, geology, and engineering are used to gain a fundamental understanding of the processes that affect the availability, movement, and quality of the Nation's water resources. Results of NRP's long-term research investigations often lead to the development of new concepts, techniques, and approaches that are applicable not only to the solution of current water problems, but also to future issues that may affect the Nation's water resources. Basic tools of hydrology that have been developed by the...
Categories: Project;
Types: ScienceBase Project;
Tags: Acid Mine Drainage,
Aquatic Habitat,
Arid Land Hydrology,
Carbon Cycle,
Contaminant Reactions and Transport, All tags...
Estuaries and Near-Shore Environments,
Evapotranspiration,
Fire effects on watersheds,
Fractured Rock,
Ground-Water Flow, Transport, and Reactions,
Ground-water Hydraulics,
Hydroclimate (including droughts and floods),
Hydrogeology,
Hypoxia (see nutrients),
Invasive Species,
Isotopic Tracers,
Lakes,
Metals,
Microbiology: Activity, Biogeochemistry, and Transport in Water,
Nutrients,
Organic Compounds (natural and man-made),
Radionuclides,
Rivers and Streams,
Sediment Chemistry,
Sediment Transport,
Statistical Hydrology,
Stream Channel Morphology,
Surface Chemistry,
Surface-Water - Ground-Water Interactions,
Surface-Water Hydraulics,
Surface-Water Transport and Reactions,
Unsaturated Zone,
Volcanic Hazards,
Watershed Studies,
Wetlands, Fewer tags
|
Understanding the effects of climatic variability is important to development of water resources, mitigation of flood hazards, and interpretation of geomorphic surfaces. Climatic variability, which is characterized by temporal changes in variability of seasonal climate that spans decades or centuries, may be more important to water-resources evaluations than changes in mean climatic conditions. Changes in variability of climate has a large effect on the probability of occurrence of extreme events, such as floods or droughts. Understanding of climatic variability and its effect on the landscape is of paramount importance for estimation of flood frequency, sediment transport rates, and long-term watershed and channel...
|
This project is focused on developing objective methods for evaluating USGS hydrologic-data-collection activities; such methods are needed so that activities can be modified when necessary and the efficiency of USGS operations maximized.
|
View more...
|
