Skip to main content
Advanced Search

Filters: Tags: Fractured Rock (X)

9 results (220ms)   

View Results as: JSON ATOM CSV
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...
This metadata record presents analytical results for laboratory microcosms conducted during 2016–18 as part of a study to develop a field test and numerical interpretation method to determine the effective diffusion coefficients and sorption coefficients of trichloroethene (TCE) and daughter products in the rock matrix of sedimentary rock, as well as biodegradation rate coefficients in the borehole. The biodegradation rate coefficients in the borehole are an important component of defining the back-diffusion of TCE from the matrix of sedimentary rock. Microcosm experiments were conducted with microbial community samples and groundwater collected from boreholes in the field test area to define anaerobic biodegradation...
thumbnail
This metadata record presents geochemical analytical data determined during laboratory experiments and a field pilot test collected during 2008-2010 to evaluate degradation of the cyclic nitramine explosive, hexahydro-1,3,4-trinitro-1,3,5-triazine (RDX), and perchlorate in a fractured rock aquifer. These experiments were conducted as part of a study to evaluate the feasibility of enhanced bioremediation for treatment of groundwater contaminants at White Sands Missile Range HTA site, New Mexico. Experiments included two anaerobic microcosm experiments, a culture enrichment test, and field injection test with the dechlorinating culture WBC-2. Data includes concentrations of nitrate, ammonium, perchlorate, RDX, and...
Hydrology of Fractured Rocks: My research objectives currently focus on characterizing the heterogeneity of fractured rock properties, and understanding the role of this heterogeneity in groundwater flow, chemical transport, and contaminant remediation. I conduct this research through methods development, field investigations, and numerical modeling. For example, recent research involves numerical modeling of multiple cross hole field aquifer tests in fractured rocks to test hypotheses about the spatial distribution of hydraulic conductivity at different scales. My research also includes collaboration on a range of topics with objectives related to contaminant characterization and remediation in fractured rocks....
Geophysical data are recorded for water wells and test holes, but interpretation is subject to significant uncertainties. The data are used in ground-water models to evaluate potential waste disposal sites and the effects of ground-water contamination and to guide development of aquifers, including geothermal reservoirs. The development of quantitative log-interpretation techniques to derive more accurate data and to evaluate the statistical uncertainty in the data will reduce costs in ground-water investigations. Project objectives are to (1) evaluate presently available logging equipment and log-interpretation packages and develop improved instrumentation and analytical techniques for specific ground-water problems...
Categories: Project; Tags: Fractured Rock, Hydrogeology
Characterizing Groundwater Flow and Chemical Transport in Fractured Rock From Meters to Kilometers: The objectives of my research are to develop a conceptual understanding of geologic, geochemical, and biological processes that affect groundwater flow and chemical transport in complex geologic settings, such as fractured rock and karst aquifers, and to test hypotheses under field scale conditions. Because the geologic complexity of fractured rock and karst aquifers can manifest itself differently over increasingly larger physical dimensions, the formulation of hypotheses and the design of field scale experiments are undertaken over physical dimensions that range from meters to kilometers.
The link between stress and hydrologic properties was examined at two sites that are distinguished by different rock types and different stress states. This investigation is based upon the analysis and interpretation of geophysical logs obtained in water wells at the two locations. At the northeast site (Newark Basin), the hydrologic characteristics of sedimentary rocks are dependent upon the relationship to the current regional stress field of two primary types of orthogonal features that serve as preferential pathways for fluid flow. Subhorizontal bedding-plane partings are highly transmissive near the surface and delineate transversely isotropic fluid flow at shallow depths. With increasing depth, the subhorizontal...
Develop, enhance, and extend theory and methods to investigate and characterize fluid flow, solute transport, heat transport, and stress/deformation changes in fractured and porous media for application to diverse areas, including the assessment of groundwater availability in bedrock terrains, remediation of contaminated sites, and evaluation of potential hazards such as induced seismicity from fluid injection.
A large amount of geophysical data is recorded in water wells and test holes but interpretation is subject to significant uncertainties. The data are used in ground-water models; to evaluate potential waste disposal sites; the effects of ground- water contamination, and to guide aquifer development, including geothermal reservoirs. The development of quantitative log interpretation techniques to derive more accurate data and to evaluate the statistical uncertainties in the data will reduce costs in ground-water investigations. Project objectives are to evaluate presently available logging equipment and log interpretation techniques and develop improved instrumentation and analytical techniques for specific ground-water...
Categories: Project; Tags: Fractured Rock, Hydrogeology


    map background search result map search result map Volatile Organic Compound and Other Analyses Associated with Laboratory Microcosm Experiments to Determine Biodegradation Rates in Fractured Sedimentary Rock at the Former Naval Air Warfare Center in West Trenton, New Jersey, 2016–18 Geochemical data from laboratory and field experiments conducted to evaluate degradation of perchlorate and RDX in groundwater, White Sands Missile Range HTA site, New Mexico Volatile Organic Compound and Other Analyses Associated with Laboratory Microcosm Experiments to Determine Biodegradation Rates in Fractured Sedimentary Rock at the Former Naval Air Warfare Center in West Trenton, New Jersey, 2016–18 Geochemical data from laboratory and field experiments conducted to evaluate degradation of perchlorate and RDX in groundwater, White Sands Missile Range HTA site, New Mexico