Download or read book Estimation of Hydraulic Conductivity Based on HK hydro kinetic and EHK electro hydro kinetic Coupled Mechanisms written by Jinwon Kim and published by . This book was released on 2010 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this study is to develop new techniques to estimate the hydraulic conductivity of soils based on two coupled mechanisms. The first is the HK (Hydro-Kinetic) coupled mechanism formulated by Biot (1956 a, b). The second is the EHK (Electro-Hydro-Kinetic) coupled mechanism formulated by Pride (1994). Based on the HK coupled mechanism for dynamic behavior of soils, a characteristic frequency is a specific frequency at which the viscous coupling and inertial damping is about the same. Dynamic excitation causes the dynamic flow between solid particles and pore water; therefore, the characteristic frequency has information to estimate the hydraulic conductivity of saturated soils. In this experimental study, attenuation-based and velocity-based measurements are conducted to obtain the characteristic frequency using two sandy soils, (QUIKRETE and Ottawa sand) and two sand/bentonite mixtures (QUIKRETE sand/bentonite and Ottawa sand/bentonite mixture). From the saturated specimens, the distinct characteristic frequency is measured from the 1/Q versus frequency and the velocity versus frequency curves. The computed hydraulic conductivity based on Biot's (1956 a, b) simplified macroscopic equation using the acoustic techniques shows comparable results with the conventional laboratory test results. In addition to the HK coupled mechanism, a new method of dynamic measurement to estimate the hydraulic conductivity is studied using the EHK (Electro-Hydro-Kinetic) coupled mechanism. The potential of direct estimation of hydraulic conductivity using EHK was proposed by Pride (1994), Haartsen and Pride (1994), and Haartsen (1995). Using the dynamic impact force, the seismoelectric conversion is induced, which is measured by two electrodes. Using two sandy soils, (QUIKRETE and Ottawa sand), and five different soil mixtures, the relations between the general soil properties and amplitudes of the seismoelectric conversion are studied. Finally, a relation between the hydraulic conductivity and measured amplitudes of the seismoelectric conversion is compared to the theoretical predictions addressed by Pride (1994) and Haartsen (1995). Based on this study, the acoustic technique is a new tool for estimating the hydraulic conductivity of sandy and silt sandy soils. In addition, the EHK coupled mechanism proved to be a possible new testing method to measure dynamic soil properties.
Download or read book Estimation of Hydraulic Conductivity Based on HK hydro kinetic and EHK electro hydro kinetic Coupled Mechanisms written by Jinwon Kim and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this study is to develop new techniques to estimate the hydraulic conductivity of soils based on two coupled mechanisms. The first is the HK (Hydro-Kinetic) coupled mechanism formulated by Biot (1956 a, b). The second is the EHK (Electro-Hydro-Kinetic) coupled mechanism formulated by Pride (1994). Based on the HK coupled mechanism for dynamic behavior of soils, a characteristic frequency is a specific frequency at which the viscous coupling and inertial damping is about the same. Dynamic excitation causes the dynamic flow between solid particles and pore water; therefore, the characteristic frequency has information to estimate the hydraulic conductivity of saturated soils. In this experimental study, attenuation-based and velocity-based measurements are conducted to obtain the characteristic frequency using two sandy soils, (QUIKRETE and Ottawa sand) and two sand/bentonite mixtures (QUIKRETE sand/bentonite and Ottawa sand/bentonite mixture). From the saturated specimens, the distinct characteristic frequency is measured from the 1/Q versus frequency and the velocity versus frequency curves. The computed hydraulic conductivity based on Biot's (1956 a, b) simplified macroscopic equation using the acoustic techniques shows comparable results with the conventional laboratory test results. In addition to the HK coupled mechanism, a new method of dynamic measurement to estimate the hydraulic conductivity is studied using the EHK (Electro-Hydro-Kinetic) coupled mechanism. The potential of direct estimation of hydraulic conductivity using EHK was proposed by Pride (1994), Haartsen and Pride (1994), and Haartsen (1995). Using the dynamic impact force, the seismoelectric conversion is induced, which is measured by two electrodes. Using two sandy soils, (QUIKRETE and Ottawa sand), and five different soil mixtures, the relations between the general soil properties and amplitudes of the seismoelectric conversion are studied. Finally, a relation between the hydraulic conductivity and measured amplitudes of the seismoelectric conversion is compared to the theoretical predictions addressed by Pride (1994) and Haartsen (1995). Based on this study, the acoustic technique is a new tool for estimating the hydraulic conductivity of sandy and silt sandy soils. In addition, the EHK coupled mechanism proved to be a possible new testing method to measure dynamic soil properties.
Download or read book Determination of Hydraulic Conductivity from Grain Size Analysis written by Michael Kasenow and published by Water Resources Publication. This book was released on 2002 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of the Electrokinetic Coupling Coefficient and Hydraulic Conductivity from Streaming Potential Measurements in a Falling head Permeameter written by and published by . This book was released on 2012 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimates of Hydraulic Conductivity from Aquifer test Analyses and Specific capacity Data Gulf Coast Regional Aquifer Systems South central United States written by David E. Prudic and published by . This book was released on 1991 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Electro Kinetic Coupling on the Measurement of Hydraulic Conductivity written by AT. Yeung and published by . This book was released on 1994 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydraulic conductivity is the proportionality constant relating the volume flow rate of a fluid through a porous medium to the imposed hydraulic gradient. Hence, there should not be any gradient or driving force other than a hydraulic gradient imposed on the sample during the measurement of the parameter. However, no precaution is taken to prevent the development of a streaming potential during the experiment. As a result, an electrical gradient is always generated across the sample and the measured hydraulic flow volumes are actually induced by the combined hydraulic and electrical gradients. The effects of electro-kinetic coupling are more pronounced in fine-grained soil. Moreover, the measured conductivity coefficient cannot be used in coupled flow equations to quantify the hydraulic volume flow rate contributed by the hydraulic gradient without appropriate corrections. This paper attempts to present the results of the theoretical analysis and experimental evaluation of the effects of electro-kinetic coupling in the measurement of hydraulic conductivity.
Download or read book Electrokinetic Techniques for the Determination of Hydraulic Conductivity written by Laurence Jouniaux and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydraulic Conductivity written by Lakshmanan Elango and published by BoD – Books on Demand. This book was released on 2011-11-23 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are several books on broad aspects of hydrogeology, groundwater hydrology and geohydrology, which do not discuss in detail on the intrigues of hydraulic conductivity elaborately. However, this book on Hydraulic Conductivity presents comprehensive reviews of new measurements and numerical techniques for estimating hydraulic conductivity. This is achieved by the chapters written by various experts in this field of research into a number of clustered themes covering different aspects of hydraulic conductivity. The sections in the book are: Hydraulic conductivity and its importance, Hydraulic conductivity and plant systems, Determination by mathematical and laboratory methods, Determination by field techniques and Modelling and hydraulic conductivity. Each of these sections of the book includes chapters highlighting the salient aspects and most of these chapters explain the facts with the help of some case studies. Thus this book has a good mix of chapters dealing with various and vital aspects of hydraulic conductivity from various authors of different countries.
Download or read book Estimating Flow Hydraulic Geometry and Hydrokinetic Power at Ungauged Locations in Canada written by James Bomhof and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A resource assessment of the hydrokinetic potential in Canada's rivers was completed. The main objectives of the study were to (1) quantify the potential hydrokinetic energy avail- able for development both nationally and regionally, and (2) develop geospatial datasets identifying streams or areas of high hydrokinetic potential. Flow estimates at ungauged locations were found using multiple linear regression coupled with Canonical correlation analysis (MLR-CCA). Total theoretical hydro power, equivalent to total theoretical hydroki- netic power was calculated using these ow estimates and hydraulic head estimates from DEMs. It is estimated that there are 710 GW of potential power in Canadian rivers, with 97.5% con dence that there is at least 433 GW. Downstream hydraulic geometry (DHG) relations were applied to ow estimates to nd cross section velocity and power at ungauged locations. Further testing was done on DHG relations, and were found to be most accurate when characterized by soil drainage characteristics.
Download or read book Statistical and Simulation Analysis of Hydraulic conductivity Data for Bear Creek and Melton Valleys Oak Ridge Reservation Tennessee written by Joseph F. Connell and published by . This book was released on 1989 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Variability and Estimation of Hydraulic Conductivity in C Horizons of Sandy Loam Glacial Till Soils Comparison of One step Outflow Laboratory Method to an I n S i t u Method for Measuring Hydraulic Conductivity written by Dan B. Jaynes and published by . This book was released on 1978 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Application of the Green and Corey Method for Computing Hydraulic Conductivity in Hydrologic Modeling written by R. J. Luxmoore and published by . This book was released on 1973 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Green and Corey method for computing the relationship of hydraulic conductivity and soil water content was implemented as a subroutine (SOIL) and coupled with a table lookup subroutine (TABLOK). These subroutines provide a package for use in soil-water modeling at several sites in the Eastern Deciduous Forest Biome. Readily available input data (water content, pressure, conductivity) are set up in SOIL and used in TABLOK such that at a given value of soil-water content the corresponding values for pressure and conductivity are calculated by linear interpolation.
Download or read book Applicability and Estimation of Error for Determination of Hydraulic Conductivity Values Based Upon Traditional Aquifer Test Methods for 2 D Groundwater Modeling written by Timothy W. Freed and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Determination of Hydraulic Conductivity Based on Soil Moisture Content of Fine Grained Soils written by Rainer Schuhmann and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Calculation of the Saturated Hydraulic Conductivity of Fine grained Soils written by American Society of Civil Engineers (ASCE) and published by . This book was released on 2017 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Standard ANSI/ASCE/EWRI 65-17 provides guidelines for calculating the saturated hydraulic conductivity (Ksat), permeability, and porosity of fine-grained soils.
Download or read book Calculation of the Saturated Hydraulic Conductivity of Fine grained Soils written by American Society of Civil Engineers and published by . This book was released on 2017 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Standard ANSI/ASCE/EWRI 65-17 provides guidelines for calculating the saturated hydraulic conductivity (Ksat), permeability, and porosity of fine-grained soils.
Download or read book Calculations in Hydraulic Engineering written by Thomas Claxton Fidler and published by Palala Press. This book was released on 2016-05-17 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
