Application of Rhizon SMS for the assessment of the hydrodynamic properties of unconsolidated fine grained materials
Application of Rhizon SMS for the assessment of the hydrodynamic properties of unconsolidated fine grained materials
A column experiment has been performed in order to derive hydrodynamic data from pore water sampling using Rhizon soil moisture sampler (SMS) devices. The column was filled with dry granite fines (a fine grained material of well-known properties), saturated with tap water and the evolution of saturation was monitored with the aid of X-ray absorption scans. Once saturation was completed, seven equally-spaced Rhizon samplers were introduced in the column and a 4-stage sequential pore water extraction process conducted. For each Rhizon sampler, flow was carefully recorded in each stage and the data obtained has been interpreted considering the sampling device as being analog to a slotted-casing low-diameter piezometer and the extraction a bail-down type hydraulic test. A modified Hvorslev's and the Gilg-Gavard's methods have been used to assess the hydraulic conductivity during extractions. Experimental results, including unsaturated parameters based on the MVG model, show a good agreement with literature reported data for granite fines, at least up to a hydraulic conductivity of ~ 10? 8 m s? 1. Although further tests are needed to check the applicability of the methodology described to materials with different granulometry and/or with concentrated pore solutions the available results show that Rhizon samplers are good candidates for the hydrodynamic assessment of sediments.
Rhizon SMS, Radius of influence, Pore water, Hydraulic conductivity, Characteristic curve
69-76
Falcon-Suarez, Ismael
9e8022b5-8799-4326-8d5b-0ed46de3b25a
Rammlmair, Dieter
419573bc-d305-4120-80c8-c13ef0ec1585
Juncosa-Rivera, Ricardo
b2a1a522-adf9-4d15-b12d-e6c8d7dfe9d5
Delgado-Martin, Jordi
c96ce7fb-5094-4fb2-b6a0-7bbdf6ed47e7
8 April 2014
Falcon-Suarez, Ismael
9e8022b5-8799-4326-8d5b-0ed46de3b25a
Rammlmair, Dieter
419573bc-d305-4120-80c8-c13ef0ec1585
Juncosa-Rivera, Ricardo
b2a1a522-adf9-4d15-b12d-e6c8d7dfe9d5
Delgado-Martin, Jordi
c96ce7fb-5094-4fb2-b6a0-7bbdf6ed47e7
Falcon-Suarez, Ismael, Rammlmair, Dieter, Juncosa-Rivera, Ricardo and Delgado-Martin, Jordi
(2014)
Application of Rhizon SMS for the assessment of the hydrodynamic properties of unconsolidated fine grained materials.
Engineering Geology, 172, .
(doi:10.1016/j.enggeo.2014.02.001).
Abstract
A column experiment has been performed in order to derive hydrodynamic data from pore water sampling using Rhizon soil moisture sampler (SMS) devices. The column was filled with dry granite fines (a fine grained material of well-known properties), saturated with tap water and the evolution of saturation was monitored with the aid of X-ray absorption scans. Once saturation was completed, seven equally-spaced Rhizon samplers were introduced in the column and a 4-stage sequential pore water extraction process conducted. For each Rhizon sampler, flow was carefully recorded in each stage and the data obtained has been interpreted considering the sampling device as being analog to a slotted-casing low-diameter piezometer and the extraction a bail-down type hydraulic test. A modified Hvorslev's and the Gilg-Gavard's methods have been used to assess the hydraulic conductivity during extractions. Experimental results, including unsaturated parameters based on the MVG model, show a good agreement with literature reported data for granite fines, at least up to a hydraulic conductivity of ~ 10? 8 m s? 1. Although further tests are needed to check the applicability of the methodology described to materials with different granulometry and/or with concentrated pore solutions the available results show that Rhizon samplers are good candidates for the hydrodynamic assessment of sediments.
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Published date: 8 April 2014
Keywords:
Rhizon SMS, Radius of influence, Pore water, Hydraulic conductivity, Characteristic curve
Organisations:
Marine Geoscience
Identifiers
Local EPrints ID: 398070
URI: http://eprints.soton.ac.uk/id/eprint/398070
ISSN: 0013-7952
PURE UUID: ffcb2603-1192-441e-a82b-0166a3317b64
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Date deposited: 15 Jul 2016 14:06
Last modified: 15 Mar 2024 01:28
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Contributors
Author:
Ismael Falcon-Suarez
Author:
Dieter Rammlmair
Author:
Ricardo Juncosa-Rivera
Author:
Jordi Delgado-Martin
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