نتایج جستجو برای: bedrock
تعداد نتایج: 3327 فیلتر نتایج به سال:
The occurrence of methyl tert-butyl ether (MTBE) in water from public wells in New Hampshire has increased steadily over the past several years. Using a laboratory reporting level of 0.2 microg/L, 40% of samples from public wells and 21% from private wells in southeast New Hampshire have measurable concentrations of MTBE. The rate of occurrence of MTBE varied significantly for public wells by e...
Physical properties of terrains encountered by the Curiosity rover during the first 360 sols of operations have been inferred from analysis of the scour zones produced by Sky Crane Landing System engine plumes, wheel touch down dynamics, pits produced by Chemical Camera (ChemCam) laser shots, rover wheel traverses over rocks, the extent of sinkage into soils, and the magnitude and sign of rover...
Mountains provide as much as 90-100% of the freshwater to surrounding basins in arid and semiarid regions because of their distinctive and complex topography, and the consequent effects on precipitation (P) and evapotranspiration (ET). One of the primary objectives of this dissertation is to estimate mountain-block recharge (MBR), an important component of the mountain contribution to groundwat...
The paper illustrates some results of research carried out to assess factors triggering debris flows which involve the pyroclastic overburdens covering carbonate mountains around Vesuvius. The aims of the research were to reconstruct a relationship between rainfall and debris flow occurrence and to highlight empirical hydrological thresholds through rainfall pattern analysis. The research was a...
I am sure you’ve heard about the triple aim introduced by the Institute for Healthcare Improvement —improving patient experience, reducing cost, and improving the health of a population. I recently discovered that this is being reconsidered, in light of a crucial missing piece – the people who actually are responsible for the patient experience and healthcare. Now conceptualized as the quadrupl...
Abstract During the past few years, number of regional and national assessments groundwater quality in regard to saltwater intrusion coastal aquifers has increased steadily. However, most international literature on is focused plains with unconsolidated material. Case studies, modelling approaches parameter studies dealing those systems are abundant. While hydrogeology fractured rock been inten...
Bedrock river-gorge incision represents a fundamental landscape-shaping process, but dearth of observational data at >10 yr timescales impedes understanding gorge formation. I quantify 102 rates and processes using historical records, field observations, topographic image analysis human-caused bedrock meander cutoff along the North Fork Fortymile River in Alaska (USA). Miners cut off 190...
Our main goal is to assess the hydrodynamics of turbidity currents and mudflows and their ability to produce morphological features such as ripples, dunes, antidunes and gullies along their paths. Of particular interest is to elucidate the role played by turbidity currents on the inception of submarine channels and canyons. To this end, understanding the mechanics of sediment erosion, including...
The preliminary geologic map of the McTarnahan Hill quadrangle, first released in 1999 in PDF format, was originally drafted in Adobe Illustrator. This Second Edition (Revised 2009) was converted and modified slightly in ArcMap Version 9.3. The Quaternary unit descriptions were not significantly changed from the original map. Bedrock unit descriptions were modified and corrected, and sections w...
Our main goal is to assess the hydrodynamics of turbidity currents and mudflows and their ability to produce morphological features such as ripples, dunes, antidunes and gullies along their paths. Of particular interest is to elucidate the role played by turbidity currents on the inception of submarine channels and canyons. To this end, understanding the mechanics of sediment erosion, including...
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