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Showing 1 to 20 of 474 for “"Bedrock"”.
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Characterization of a hydraulically induced bedrock fracture
… supply. This process extends and widens existing bedrock fractures, allowing groundwater storage to increase. Researchers have studied the behavior of fractured-rock aquifers for decades, but little has been published on the hydraulic and mechanical properties of hydraulically enhanced fractures. …
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Lexicon of bedrock stratigraphic names of North Dakota
<p>This lexicon of bedrock stratigraphic names of North Dakota consists of a general definition of each unit as well as the history of stratigraphic nomenclature, An attempt was made to include all units for North Dakota whether formally or informally named, or cur rently being used in the state. …
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Fluvial bedrock abrasion by bedload : process and form
Bedrock channels are a key component of the landscape. Pluvial bedrock incision sets the local base level, the boundary condition for hill slope processes, transmits tectonic and climatic signals throughout the landscape and transports sediments to sedimentary basins. Bedrock river networks are …
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Environmental Influences on Tree-driven Karst Bedrock Physical Weathering
… magnitude of forces exerted by tree roots onto bedrock. I analyzed meteorological conditions in addition to root forces to examine the environmental controls on diurnal cycles of forces exerted on the bedrock and to identify how roots responded to wind gusts and rainfall events. Roots of both …
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Bedrock channel response to tetonic, climatic and eustatic forcings
The response of bedrock channels to external forcings is investigated in this thesis. The approach is to test and constrain a theoretical model for bedrock-channel incision based on shear stress using field data. The primary study area is a series of 21 small, coastal drainage basins in northern …
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Deep-seated bedrock landsliding in Grand Canyon's Surprise Valley area
… understood. This paper describes deep-seated bedrock landslides in the Surprise Valley area by combining detailed mapping, volume-balanced cross-sections, strath terrace heights, and cosmogenic burial dating of river deposits buried by landslides. Mapping shows failures involving ~1000 m …
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Some contributions to the hydraulic characterization of fractured bedrock formations
… field site, research has led to developments in bedrock monitoring, groundwater sampling, formation hydraulic testing, and the conceptual model of formation hydraulics. This dissertation presents a field device, two hydraulic test methods, and one method of hydraulic test analysis developed to …
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Seismic Response of a Linear Bedrock-Soil-Structure Interaction System
Made available in DSpace on 2015-05-12T22:37:15Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7309860.PDF: 5119937 bytes, checksum: 6b5b47ca752aa89c895b85b39578ca70 (MD5) Previous issue date: 1972
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Memory-safe microcontroller applications with the Bedrock structured programming system
… come through other means. One such mechanism is Bedrock, a library for the Coq proof assistant that applies separation logic to a small c-like language, allowing programmers to prove memory-related properties about their code. I used Bedrock to build a security peripheral out of a Cortex-m3 …
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Bedrock geology of the seacoast region of New Hampshire, United States
<p>The seacoast region of New Hampshire is underlain by two lithotectonic belts: the Rye Complex (RC), and the eastern portion of the Merrimack Group (MG). The Rye Formation and the Breakfast Hill member constitute the RC; the Kittery, Eliot, and Berwick Formations, the MG. The stratigraphic order …
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The Dynamics of Coarse Sediment Transfer in an Upland Bedrock River
Bedrock channels in UK upland environments have received relatively little attention despite their importance within upland river systems and their influence on controlling the conveyance of sediment downstream. This thesis aims to quantify and model the transfer of coarse sediment through Trout …
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Lithologic Controls on Bedrock Channel Morphology in the Buffalo River Basin
… rates. However, analysis of chi gradients of bedrock channels across several lithologies in the Buffalo River Basin reveals disequilibrium in the basin controlled by the presence of a thick interval of Pennsylvanian sandstone that caps many of the plateaus in the basin. Headwater channels …
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The role of precipitation on Bedrock Channel Incision in Kauai, HI
Erosion of bedrock channels is frequently modeled with the stream power law, which relates erosion rates to drainage area, slope, and an erosional efficiency coefficient k. The value of k, however, varies with many physical factors and most of these relationships are not well quantified. This study …
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Field Indicators for the Prediction of Appalachian Soil and Bedrock Geochemistry
… Se was significantly higher in unweathered bedrock than in soil or weathered bedrock. Samples generating exothermic reactions with 30% H2O2 produced higher SC levels, sulfate, Mg, and Se. In conclusion, the mine spoils studied varied widely in geochemical properties. The simple field …
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The transient response of bedrock river networks to sudden base level fall
Following a change in the factors that determine landscape form, a transient signal of adjustment propagates through the river network, progressively adjusting channels and hillslopes to the new conditions. When conditions favor incision, the rate and mechanism by which this signal propagates …
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Using Ground Penetrating Radar Signal Reflection to Model a Highly Transmissive Bedrock Aquifer
… is required. Modeling contaminant transport in bedrock aquifers requires that the spatial distributions of highly conductive geologic features are characterized along with the hydraulic transmissivities of those features (Shapiro, 2003). The goal of this research is to refine the numerical model …
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