Download or read book In situ Permeability Measurements with the Cone Permeameter trademark Measurement System written by and published by . This book was released on 1998 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The permeability of soil to fluid flow defines the magnitude of soil gas and groundwater flow under imposed pressure gradients. Pressure gradients exist due to natural effects such as hydraulic gradients (in the case of groundwater) and barometrically imposed gradients (in the case of soil gas). Unnatural gradients are imposed by soil vapor extraction air sparging, active venting, pump-and-treat, and other remediation processes requiring the active movement of fluids through the soil. The design of these processes requires knowledge of the flow characteristics of the soil. The most variable of the soil's flow characteristics is its permeability, which can vary by several orders of magnitude in a given geologic and hydrologic setting. Knowledge of soil gas permeability is needed to design soil vapor extraction systems and predict the general movement of gas in soil. Saturated hydraulic conductivity, or the soil's permeability to liquid flow, is required to predict movement of groundwater in saturated soils. The variability of permeability is illustrated by the range of values for different media in a table. It is not uncommon for permeabilities to vary by several orders of magnitude at a given site.
Download or read book In situ Permeability Measurements with Direct Push Techniques written by and published by . This book was released on 1999 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: This effort designed, fabricated, and field tested the engineering prototype of the Cone Permeameter{trademark} system. The integrated system includes the instrumented penetrometer probe, air and water pumps, flowrate controls, flow sensors, and a laptop-controlled data system. All of the equipment is portable and can be transported as luggage on airlines. The data system acquired and displays the process measurements (pressures, flows, and downhole temperature) in real time and calculates the resulting permeability. The measurement probe is a 2 inch diameter CPT rod section, incorporating a screened injection zone near the lower end of the rod and multiple sensitive absolute pressure sensors embedded in the probe at varying distances from the injection zone. Laboratory tests in a large test cell demonstrated the system's ability to measure nominally 1 Darcy permeability soil (30 to 40 Darcy material had been successfully measured in the Phase 1 effort). These tests also provided a shakedown of the system and identified minor instrument problems, which were resolved. Supplemental numerical modeling was conducted to evaluate the effects of layered permeability (heterogeneity) and anisotropy on the measurement system's performance. The general results of the analysis were that the Cone Permeameter could measure accurately, in heterogeneous media, the volume represented by the sample port radii if the outer pressure ports were used. Anisotropic permeability, while readily analyzed numerically, is more complicated to resolve with the simple analytical approach of the 1-D model, and will need further work to quantify. This phase culminated in field demonstrations at the DOE Savannah River Site. Saturated hydraulic conductivity measurements were completed at the D-Area Coal Pile Runoff Basin, and air permeability measurements were conducted at the M Area Integrated Demonstration Site and the 321 M area. The saturated hydraulic conductivity measurements were the most successful and compared well to relevant existing data. Air permeability measurements were more problematic, primarily due to clay covering pressure measuring ports and preventing pressure communication with the sensors. Very little discreet air permeability data existed for the sites.
Download or read book In Situ Permeability Measurements for the Event in U1 C written by Carl Keller and published by . This book was released on 1963 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In situ Permeability Measurements written by J. M. Golden and published by . This book was released on 1988 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In Situ Permeability Measurements for the Event in U1 C written by and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Test apparatus was designed for the measurement of the in situ permeability in the vicinity of the 1100-ft UI-C shaft at NTS. A very reasonable approximation to a one-dimensional flow geometry was obtined. Measurement of gas injection flow rates and pressures allowed the determination of the effective permeability of the medium around the Ul-C shaft to be from 1 to 10 darcys with the major exceptions at depths of less than 200 ft where the permeability was greater than 40 darcys. However, permeability results were seen to vary with source pressure and, therefore, must be used with discretion. (auth).
Download or read book WIPP Horizon in Situ Permeability Measurements written by and published by . This book was released on 1985 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Determination of the in Situ Permeability of Base and Subbase Courses written by Lyle K. Moulton and published by . This book was released on 1979 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geophysical Applications for Geotechnical Investigations written by Wayne R. Saunders and published by ASTM International. This book was released on 1990 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Measurement of Soil Properties In situ written by James Kenneth Mitchell and published by . This book was released on 1978 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Measurement of Soil Permeability in Situ by the Constant Head Test written by Robert Moir Kennard and published by . This book was released on 1971 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Instrumentation of In Situ Experiments in Underground Laboratories for Radioactive Waste Disposal written by B. Come and published by Routledge. This book was released on 2022-03-02 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1995. This volume includes papers of a Joint CEC-NEA Workshop on ‘Design and Instrumentation of In-Situ Experiments in Underground Laboratories for Radioactive Waste Disposal ‘held in, Brussels,15-17 May 1984. About 100 specialists attended this meeting, in which a review of the current developement of such underground facilities was made.
Download or read book Environmental Soil Physics written by Daniel Hillel and published by Elsevier. This book was released on 1998-09-09 with total page 801 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental Soil Physics is a completely updated and modified edition of the Daniel Hillels previous, successful books, Introduction to Soil Physics and Fundamentals of Soil Physics. Hillel is a Pulitzer Prize-winning author, one of the true leaders in the field of environmental sciences. The new version includes a chapter and problems on computational techniques, addresses current environmental concerns and trends. - Updates and expands the scope of Hillel's prior works, Fundamentals of Soil Physics (1980)and Applications of Soil Physics (1980) - Explores the wide range of interactions among the phases in the soil and the dynamic interconnections of the soil with the subterranean and atmospheric domains - Draws attention to historical and contemporary issues concerning the human management of soil and water resources - Directs readers toward solution of practical problems in terrestrial ecology, field-scale hydrology, agronomy, and civil engineering - Incorporates contributions by leading scientists in the areas of spatial variability, soil remediation, and the inclusion of land-surface processes in global climate models
Download or read book Role of Large scale Permeability Measurements in Fractured Rock and Their Application at Stripa written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Completion of the macropermeability experiment will provide: (i) a direct, in situ measurement of the permeability of 105 to 106 m3 of rock; (ii) a potential method for confirming the analysis of a series of small scale permeability tests performed in surface and underground boreholes; (iii) a better understanding of the effect to open borehole zone length on pressure measurement; (iv) increased volume in fractured rock; (v) a basis for evaluating the ventilation technique for flow measurement in large scale testing of low permeability rocks.
Download or read book Acoustic Waveform Logs and the In Situ Measurement of Permeability A Review written by DR. Burns and published by . This book was released on 1990 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Full waveform acoustic logs are composed of two propagating head waves, the P and S waves, and two guided waves, the pseudo-Rayleigh and tube (Stoneley) waves. The measurement of P and S wave slowness provides information on the subsurface lithology as well as estimates of the in-situ dynamic compressibility and rigidity of those formations. Strong correlations exist between measured in-situ permeability and the slowness and attenuation of the tube wave. The tube wave slowness can provide a measure of permeability variations if corrections are made for any changes in the formation shear wave velocity and borehole radius, both of which also affect the tube wave slowness. The Biot model of wave propagation in a porous and permeable formation can be used to estimate absolute in-situ permeability values from tube wave attenuation measurements if all of the model parameters are accurately known. Permeability estimates obtained by using both of these methods on field data sets in two different lithologies are in good agreement with smoothed core permeability measurements. Because heavy drilling fluids are not used in most geotechnical boreholes, there is no mudcake buildup along the borehole wall, thereby removing one of the greatest causes of uncertainty in using tube waves to estimate in-situ permeability.
Download or read book Crustal Permeability written by Tom Gleeson and published by John Wiley & Sons. This book was released on 2016-11-30 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: Permeability is the primary control on fluid flow in the Earth’s crust and is key to a surprisingly wide range of geological processes, because it controls the advection of heat and solutes and the generation of anomalous pore pressures. The practical importance of permeability – and the potential for large, dynamic changes in permeability – is highlighted by ongoing issues associated with hydraulic fracturing for hydrocarbon production (“fracking”), enhanced geothermal systems, and geologic carbon sequestration. Although there are thousands of research papers on crustal permeability, this is the first book-length treatment. This book bridges the historical dichotomy between the hydrogeologic perspective of permeability as a static material property and the perspective of other Earth scientists who have long recognized permeability as a dynamic parameter that changes in response to tectonism, fluid production, and geochemical reactions.
Download or read book In situ measurements of permeability in basalt written by Don C. Banks and published by . This book was released on 197? with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
