Relevant bibliographies by topics / Soil permeability – Measurement

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Soil permeability – Measurement'

Author: Grafiati
Published: 4 June 2021
Last updated: 19 February 2022

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Journal articles on the topic "Soil permeability – Measurement"

1

Roseberg, R. J., and E. L. McCoy. "Measurement of Soil Macropore Air Permeability." Soil Science Society of America Journal 54, no. 4 (1990): 969–74. http://dx.doi.org/10.2136/sssaj1990.03615995005400040005x.

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Groenevelt, P. H., and G. G. Lemoine. "On the measurement of air permeability." Netherlands Journal of Agricultural Science 35, no. 3 (1987): 385–94. http://dx.doi.org/10.18174/njas.v35i3.16733.

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Air pemeability values are used to assess the state of aeration, soil structural stability, structural degradation and compaction. A simple experimental procedure, using a constant-speed motor, a syringe and simple pressure sensors, is discussed. At steady-state air flow throught a soil sample the air permeability coefficient can be derived directly from Kirkham's equation. For transient conditions an equation is presented, based on a combination of Kirkham's equation and the ideal gas law, from which the air permeability coefficient can be deduced by trial and error. The importance of the soil water potential, in relation to the measurement of air permeability, is discussed. Complications arising from the 'non-ideal' behaviour of the pressure sensor are also discussed. (Abstract retrieved from CAB Abstracts by CABI’s permission)
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Nakajima, Toru, Seishu Tojo, Hirotaka Saito, and Makoto Kato. "Measurement System for Soil-Air Permeability Coefficient in Soil Deodorizer." Journal of the Japan Society of Material Cycles and Waste Management 20, no. 6 (2009): 394–400. http://dx.doi.org/10.3985/jjsmcwm.20.394.

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Huang, Shangyan, D. G. Fredlund, and S. L. Barbour. "Measurement of the coefficient of permeability for a deformable unsaturated soil using a triaxial permeameter." Canadian Geotechnical Journal 35, no. 3 (1998): 426–32. http://dx.doi.org/10.1139/t98-011.

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The development of a specially designed triaxial permeameter for the measurement of the coefficient of permeability of deformable unsaturated soils is presented in this paper. The triaxial permeameter makes it possible to directly measure the coefficient of permeability at various combinations of net normal stresses and matric suction values. The volume change of the soil specimen during the permeability measurement can also be monitored. The performance of the permeameter is demonstrated for a group of tests conducted on slurried specimens of a silty sand.Key words: unsaturated soil, coefficient of permeability, triaxial permeameter, volume change.
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Schjønning, Per, and Michael Koppelgaard. "The Forchheimer Approach for Soil Air Permeability Measurement." Soil Science Society of America Journal 81, no. 5 (2017): 1045–53. http://dx.doi.org/10.2136/sssaj2017.02.0056.

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Jin, Qing, Xinzhuang Cui, Junwei Su, Tu Lu, Jieru Wang, and Ruonan Han. "Laboratory Measurement and Analysis of the Deteriorated Layer Permeability Coefficient of Soil-Cement Deteriorated in a Saline Environment." Materials 12, no. 14 (2019): 2245. http://dx.doi.org/10.3390/ma12142245.

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The deterioration of soil-cement in a saline environment leads to a reduction in strength and an increase in permeability. Effective methods of determining the deteriorated layer permeability coefficient of soil-cement are currently lacking. A laboratory test method for measuring the permeability coefficient of the deteriorated layer was proposed using the modified permeability coefficient testing apparatus. According to the proposed method, the permeability coefficient of the deteriorated layer could be obtained after testing the permeability coefficient of the soil-cement specimen in acuring room and testing the equivalent permeability coefficient and deterioration depth of the soil-cement specimen in a deteriorated environment. Using the marine dredger fill from Jiaozhou Bay as a case study, the deteriorated layer permeability coefficients of soil-cements with different cement contents were tested. It turned out that the permeability of the deteriorated layer increases with age. At the beginning of the curing age, higher cement content led to a smaller permeability coefficient of the deteriorated layer of soil-cement. As the curing age increased, the deteriorated layer permeability coefficient of the soil-cement with higher cement content increased. The evolution of the permeability coefficient of a deteriorated layer with age can be formulated as the Logistic function. This study provides support for anti-permeability designs of soil-cement structures in saline environments.
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Bouchalova, Jana, Helena Raclavská, and Vendula Klimantová. "Influence of Humidy on Radon Volume Activity on Lands." Key Engineering Materials 838 (April 2020): 111–17. http://dx.doi.org/10.4028/www.scientific.net/kem.838.111.

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The research is primarily focused on the determination of humidity on radon volume activity in different soil gas permeabilities in a given land. The research also included the detrermination of the radon index in the given land. The mean concentrations of radon in soil gas during the drought ranged from 15.9 - 24.1 kBq/m3 and in the precipitation period 16.3 - 26.7 kBq/m3. The first area was characterized by low gas permeability of soils, where a low radon index was determined during the dry season and a medium radon index was determined in the precipitation period. The second area, the medium gas permeability of the soils was determined from the analysis of the collected soil samples. The values of the third quartile in both cases measurements of radon volume activity in soil gas fall into the middle class of radon index. The third location would be determined by high gas permeability of soils. The radon index of the given land during the drought was determined as the medium, as in the case of measurement of radon volume activity in soil gas in the period with added moisture in the soil profile. The analysis confirmed the effect of moisture on the volume activity of radon.
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Priono, Harianto Rahardjo, Kalyani Chatterjea, and Eng-Choon Leong. "Laboratory investigation on hydraulic anisotropy behavior of unsaturated soil." Canadian Geotechnical Journal 54, no. 7 (2017): 1034–46. http://dx.doi.org/10.1139/cgj-2016-0023.

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Hydraulic anisotropy behavior of unsaturated soil has not been fully investigated. Direct laboratory measurement and indirect determination of hydraulic anisotropy under a drying condition were carried out on statically compacted specimens having different initial conditions. Direct measurement of permeability was carried out using an unsaturated triaxial permeameter whereas indirect determination of permeability was performed through statistical estimation via a measured drying soil–water characteristic curve (SWCC). In this research, two orientations — specifically horizontal-layering (HL) and vertical-layering (VL) orientations — were prepared for a given specimen from statically compacted homogeneous sand–kaolin. The results from both direct measurement and indirect determination of hydraulic anisotropy were in good agreement. Hydraulic anisotropy under an unsaturated condition was found to be similar with that in a saturated condition. Moreover, hydraulic anisotropy was reflected in the ratio of transient time during the direct measurements of HL and VL specimens at high matric suctions. In contrast, in the indirect method, hydraulic anisotropy was reflected in the ratio of equalization time during SWCC tests at matric suctions higher than the air-entry value of the soil.
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Rodeck, Shawn A., Bruce A. DeVantier, and Braja M. Das. "Air‐Permeability Measurement for Soil at Low and High Pressure." Journal of Environmental Engineering 120, no. 5 (1994): 1337–43. http://dx.doi.org/10.1061/(asce)0733-9372(1994)120:5(1337).

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CHO, JONG SOO, and DARLA ELLETT. "Soil-Air Permeability Measurement with a Transient Pressure Buildup Method." Hazardous Waste and Hazardous Materials 12, no. 4 (1995): 365–71. http://dx.doi.org/10.1089/hwm.1995.12.365.

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Dissertations / Theses on the topic "Soil permeability – Measurement"

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Hussen, Akif Ali. "Measurement of Unsaturated Hydraulic Conductivity in the Field." FIND on the Web, 1991.

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2

Murray, Gordon Bruce. "The development of an estimation method for the saturated hydraulic conductivity of selected Nova Scotia soils /." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59983.

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An estimation method for predicting the saturated hydraulic conductivity (Ksat) of the soil was developed for common Nova Scotia soil types by examination of historical Ksat records. Detailed statistical analysis was performed to develop useful predictive models for Ksat based on soil physical properties and to determine the confidence limits for specific horizon-soil type combinations. Sensitivity analysis of the Hooghoudt equation was then performed to establish Ksat classes to which the confidence limits could be assigned to complete the development of the estimation method.<br>Model development processes proved unsuccessful due to the influence of factors not considered by the model due to their qualitative nature. Independent field testing of the estimation method with respect to core and Guelph permeameter measurement techniques produced measured values within the same class as the estimated value 34% of the time for both techniques and values within one estimated class or less 70 and 76% of the time for core and permeameter techniques respectively.
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Hussen, Akif Ali 1957. "Measurement of Unsaturated Hydraulic Conductivity in the Field." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/191170.

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Unsaturated hydraulic conductivity was measured using four different methods. Tension permeameters were used to measure unsaturated hydraulic conductivity in the field, using a single disc method, which depends on the measurements of sorptivity, steady state flow rate, initial and final water content (White and Perroux, 1987, 1989). Also, a double disc method was used which utilizes Wooding's (1968) equation for two different disc radii at the same tension for steady state flow rates. Undisturbed and disturbed soil cores were used to measure unsaturated hydraulic conductivity in the lab, using water retention curves with van Genuchten's equations. There were no significant differences in the mean of hydraulic conductivity between single and double disc methods in all the tensions used (0, 5, 10 and 15 cm). There were significant differences between the field methods and undisturbed soil cores in zero cm tension, and disturbed soil cores in 10 and 15 cm tension. The effect of land preparation on the unsaturated hydraulic conductivity was studied using the double disc method. Tilling has significant effects on the unsaturated hydraulic conductivity at all tensions used. The spatial variation of unsaturated hydraulic conductivity and steady state flow in different tensions using the double disc method was studied. We found exponential variogram models for unsaturated hydraulic conductivity at 5, 10 and 15 cm tensions and a random model for zero cm tension. Also, exponential models were best fitted for steady state flow corresponding to pores radii of 0.03 - 0.015 cm, 0.015 - 0.010 cm and steady state flow at 10 cm tension. A Michaelis-Menton model was used for steady state flow at 5 cm and 15 cm tension. Disc permeameters were also used to add 5 cm depth of water, bromide and dye solution at 0, 5, 10 and 15 cm tensions with three replicates. A comparison was made between field data and simulated model under the same boundary and initial conditions as in the field. Results showed that the water and bromide move deeper than the prediction of the simulated model in all tensions used. The differences were larger between simulated model and field data for both water and bromide concentrations in the lower tension and smaller in the higher tension as a result of elimination of some preferential flow paths. An equation was developed for cumulative infiltration valid for both small and large time. The parameters calculated using the developed equation closely matched the measured infiltration, and fit better than a three term series similar to the Philip equation for one-dimensional flow.
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Lee, Sang Soo. "Soil surface-seal measurement using high-resolution x-ray computed tomography (HRCT)." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4507.

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Thesis (M.S.) University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 24, 2007) Vita. Includes bibliographical references.
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Sande, Leif Andrew. "Experimental Studies on Infiltration/Soil-Water Movement Processes and Green-AMPT Modeling." Thesis, North Dakota State University, 2011. https://hdl.handle.net/10365/29329.

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Experimental studies on infiltration/soil-water movement processes are vital to better understanding movement of soil-water in the vadose zone. The objective of this experimental research was to investigate infiltration/soil-water movement processes utilizing laboratory experiments and computer modeling. Small scale laboratory soil box infiltration experiments were conducted and utilized for the improved parameterization of the Green-Ampt (GA) saturated moisture content parameter to produce an effective moisture content parameter (Be) for utilization in a modified GA model. By incorporating ?e values into GA modeling, modeling results showed greatly improved wetting front prediction across different soil conditions. A new soil packing method was proposed for replicating complex microtopographical surfaces with uniform bulk densities in laboratory soil box experiments which proved efficient and effective at accomplishing both objectives. A rainfall simulator and an instantaneous-profile laser scanner were used to simulate rainfall and quantify surface microtopography for experiments. The results clearly show the effect of microtopography on infiltration and soil-water movement characteristics. This offers valuable insight into infiltration/soil-water movement processes as affected by different soil and surface microtopographic conditions.<br>National Science Foundation (Grant No. EAR-0907588)
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Roy, Pierre. "Measurements of soil permeability anisotropy by three techniques." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60639.

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Measurements of vertical and horizontal components of hydraulic conductivity were made by the falling head permeameter, the standard piezometer and the piezometer with packing device on 4 farms in the Saint-Lawrence lowlands of Quebec, Canada. All fields are considered to be between imperfectly and slowly drained.<br>The values obtain by the 2 types of piezometer were calculated with the aid of 3 different equations and were compared.<br>The falling head permeameter technique was found to be not appropriate to study anisotropy in clay and clay loam soils due to its high variability and small volume of soil sampled.<br>Both piezometers were found well suited to make directional hydraulic conductivity measurements. Values of vertical hydraulic conductivity twice greater than values of horizontal hydraulic conductivity were obtained by piezometer measurements in a subsoil of a St-Benoit soil series.
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Cunningham, Michael (Michael Ian) Carleton University Dissertation Engineering Civil and Environmental. "Relative permeability measurements for two phase flow through low permeability soils." Ottawa, 1994.

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Srisakthivel, Subramaniam. "Laboratory measurement of the permeability of clay soils assisted by a self-boring device." Thesis, University of Sheffield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.408297.

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Rocklin, Pascal. "Conception de sondes de détection et développement de techniques de mesure in situ de la contamination de matrices solides (sols, déchets) par des composés organiques volatils." Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL049N.

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Le grand nombre de sites et de sols contamines répertorié, dont la contamination est à évaluer, nécessite la recherche de techniques de détection rapides et moins couteuses que les méthodes classiques d'échantillonnage et d'analyse chimique. La détection des composés organiques volatils (COV) présents dans la plupart des sites contaminés est le thème traité. Dans l'objectif de réaliser des mesures in situ des COV en minimisant la quantité échantillonnée, une sonde de prélèvement gazeux par perméation membranaire couplée à un ou des détecteurs de COV gazeux est développée et étudiée. La membrane permet non seulement de protéger les détecteurs vis-à-vis de liquides et de poussières éventuels et de minimiser le transfert de composés interférents ; mais peut aussi assurer une fonction de sélectivité. La dynamique de transfert et la sélectivité du système de prélèvement et de mesure sont étudiées expérimentalement avec une membrane microporeuse et des membranes polymériques homogènes. Le code de calcul multimilieux (sol, membrane, air,) développé (intermil) permet de déterminer les paramètres fondamentaux de transfert par ajustement aux mesures expérimentales. L'étude aboutit à deux résultats majeurs: d'une part, le développement d'une sonde à perméation expérimentale qui mesure la contamination en des points successifs durant l'enfoncement dans le sol et ceci en minimisant les effets de rémanence, d'autre part, une méthode de traitement des résultats de mesures par des détecteurs de COV à réponses complémentaires qui permet d'obtenir des cartes représentatives de la répartition de la contamination synthétisant l'information
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Anderson, C. "The permeability of fine grained soils : an investigation into unconventional methods of measurement in the laboratory." Thesis, Queen's University Belfast, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546001.

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Books on the topic "Soil permeability – Measurement"

1

Shakofsky, Stephanie. Changes in soil hydraulic properties caused by construction of a simulated waste trench at the Idaho National Engineering Laboratory, Idaho. U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

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Perkins, Kim S. Measurement of hydraulic properties of the B-C interbed and their influence on contaminant transport in the unsaturated zone at the Idaho National Engineering and Environmental Laboratory, Idaho. U.S. Dept. of the Interior, U.S. Geological Survey, 2000.

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Chemeda, Desalegn. A study of unsaturated hydraulic conductivity of soils as determined by aid of TDR. University College Dublin, 1998.

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International Workshop on Indirect Methods for Estimating the Hydraulic Properties of Unsaturated Soils (1989 Riverside, Calif.). Indirect methods for estimating the hydraulic properties of unsaturated soils: Proceedings of the International Workshop on Indirect Methods for Estimating the Hydraulic Properties of Unsaturated Soils, Riverside, California, October 11-13, 1989. U.S. Salinity Laboratory, Agricultural Research Service, U.S. Dept. of Agriculture, 1992.

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Schernewski, Gerald. Modellrechnungen zum Verhalten von Chemikalien in Böden: Vergleich mit Freilandmessungen des Herbizids 2,4,5-T. Gesellschaft für Strahlen- und Umweltforschung, 1988.

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Hannula, Steven R. Temporal and spatial variations of hydraulic conductivity in a stream bed in Golden, Colorado. Colorado Water Resources Research Institute, Colorado State University, 1995.

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American Society of Civil Engineers. Standard guideline for the geostatistical estimation and block-averaging of homogeneous and isotropic saturated hydraulic conductivity. American Society of Civil Engineers, 2010.

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Scanlon, Bridget R. Relationship between arid geomorphic settings and unsaturated zone flow: Case study, Chihuahuan Desert, Texas. Bureau of Economic Geology, University of Texas at Austin, 2000.

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Perkins, Kim S. Measurement of unsaturated hydraulic properties and evaluation of property-transfer models for deep sedimentary interbeds, Idaho National Laboratory, Idaho. United States Department of the Interior, United States Geological Survey, 2014.

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Huddleston, J. H. An overview of the Oregon Water Quality Decision Aid (OWQDA): A tool for assessing groundwater contamination risk from specific soil-pesticide combinations. Oregon State University Extension Service, 1998.

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Book chapters on the topic "Soil permeability – Measurement"

1

Tokoro, Tetsuya, and Tatsuya Ishikawa. "Measurement for Permeability of Frozen Soil by Transient Pulse Method." In Lecture Notes in Civil Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-0450-1_8.

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Bruns, Michael. "In-Situ Measurement of Rock Permeability in Borings and at Ground Water Measuring Points — A Comparison of Methods." In Contaminated Soil ’90. Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-011-3270-1_87.

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Tadanaga, Kiyoharu, and Tsutomu Minami. "Measurements of Gas Adsorption and Permeability of Sol–Gel Materials." In Handbook of Sol-Gel Science and Technology. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-19454-7_39-1.

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Tadanaga, Kiyoharu, and Tsutomu Minami. "Measurements of Gas Adsorption and Permeability of Sol-Gel Materials." In Handbook of Sol-Gel Science and Technology. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-32101-1_39.

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Zhang, F., B. Ye, W. M. Ye, and L. Xua. "Measurement of Supercritical CO2 Permeability in Porous Rock at Reservoir Conditions." In Advances in Laboratory Testing and Modelling of Soils and Shales (ATMSS). Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52773-4_7.

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"Measurement of Permeability." In Soil Mechanics for Unsaturated Soils. John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470172759.ch6.

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Busse, J., A. Scheuermann, S. Galindo-Torres, D. Bringemeier, and L. Li. "In-situ and laboratory measurements of coal matrix and cleat permeability." In Unsaturated Soils: Research & Applications. CRC Press, 2014. http://dx.doi.org/10.1201/b17034-208.

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Busse, J., A. Scheuermann, S. A. Galindo-Torres, D. Bringemeier, and L. Li. "In-situ and laboratory measurements of coal matrix and cleat permeability." In Unsaturated Soils: Research & Applications. CRC Press, 2020. http://dx.doi.org/10.1201/9781003070580-73.

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Gan, J. K. M., and D. G. Fredlund. "A new laboratory method for the measurement of unsaturated coefficients of permeability of soils." In Unsaturated Soils for Asia. CRC Press, 2020. http://dx.doi.org/10.1201/9781003078616-65.

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Conference papers on the topic "Soil permeability – Measurement"

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Ray, C., B. Bezak, K. Petrey, and E. Shea. "Measurement and Optimization of Permeability in Bioretention Soil Media." In International Low Impact Development 2015. American Society of Civil Engineers, 2015. http://dx.doi.org/10.1061/9780784479025.018.

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Seishu TOJO, Tadashi CHOSA, Takuya KIKUCHI, and Toru NAKAJIMA. "Measurement System of Air Permeability and Airflow Resistance in Soil Deodorizer." In 2011 Louisville, Kentucky, August 7 - August 10, 2011. American Society of Agricultural and Biological Engineers, 2011. http://dx.doi.org/10.13031/2013.37811.

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Kamiya, K., R. Bakrie, and Y. Honjo. "A New Method for the Measurement of Air Permeability Coefficient of Unsaturated Soil." In Fourth International Conference on Unsaturated Soils. American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40802(189)146.

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Kar, Shantanu, and Ryan Phillips. "Submarine Slope Failures in Gassy Soils." In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-41829.

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This paper investigates the stability of a submarine gassy slope triggered by tidal variations. Under tidal variations on an unsaturated slope, failure may occur under specific combinations of increasing degree of saturation and soil permeability, and decreasing tidal period. A novel physical model test in a geotechnical centrifuge was undertaken of a submarine slope containing gassy sediments. The model preparation techniques, measurement systems and preliminary results are presented. The response observed in the model test is discussed and further developments proposed. Existing numerical simulations may provide a basis for verification and validation of future physical model test results.
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Antonov, Dimitar. "Soil Based Barriers for a Low and Intermediate Level Radioactive Waste Disposal." In ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4761.

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The loess terrains near “Kozloduy” NPP are among the prospective areas for the disposal of low and intermediate level radioactive waste. The analysis of the loess properties has shown two main problems: a loess collapsibility and water permeability. Using a soil-cement cushion under the repository foundation and a soil-cement backfill between the containers is a possibility to avoid these disadvantages. In this connection loess-cement mixtures with bentonite and clinoptilolite additives have been investigated. The aim of mixtures is to improve the impermeability and sorbtion properties against radionuclide migration. In the paper strength parameters of two kind of mixtures are discussed. According to their water content some are compacted at the optimum moisture content until the maximum dry density and others are compacted at higher moisture content equal to the liquid limit of loess. For the first type of mixtures the unconfined compressive strength (UCS) varies from 2 to 6 MPa depending on the cement and additives percents. Permeability measurements have shown satisfactory results. The UCS for the second type of mixtures is less than the first type, but is sufficient for a backfill between the waste containers. The conclusion is that the loess-cement mixtures, especially these with clinoptilolite additive, are prospective as barriers of a low and intermediate level radioactive waste repository.
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White, David, Jinbo Chen, Susan Gourvenec, and Conleth O’Loughlin. "On the Selection of an Appropriate Consolidation Coefficient for Offshore Geotechnical Design." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-95800.

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Abstract This paper addresses the selection of an appropriate consolidation coefficient for the analysis of drainage beneath foundations and pipelines in offshore geotechnical design. An emerging trend in the design of subsea infrastructure is the consideration of ‘whole life’ effects — namely the changes in soil properties and geotechnical capacity over the operating life. Seabed pipelines that undergo repeated thermal expansion and contraction cause shearing and consolidation in the underlying soil, leading to significant changes in the available seabed friction. Also, foundations that are either fixed or designed to slide on the seabed, are subjected to intermittent loads interspersed with periods of consolidation. These also cause a change in seabed strength and geotechnical capacity. To assess the time over which these effects occur, and therefore their influence on the response and the reliability of the system, it is necessary to perform consolidation calculations, using an appropriate consolidation coefficient. This paper presents observed operative consolidation coefficients drawn from recent model testing measurements and numerical analyses. It is shown that the consolidation rate can vary by more than an order of magnitude for the same soil profile under different loading conditions, due to the differences in stiffness and permeability. Meanwhile, design parameters are commonly drawn from one-dimensional oedometer compression tests. This compendium of data highlights the potential variation in consolidation coefficient for different loading types and through the ‘whole life’ of infrastructure. A key conclusion is that consolidation effects generally occur faster than is commonly assumed, meaning that changes in strength and stiffness — that are commonly beneficial in design — may be more readily relied on than is done so in current practice.
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