Estimation of LNAPL saturation in fine sand using time-domain reflectometry
Haridy, SA ; Persson, Magnus LU and Berndtsson, Ronny LU
(2004)
In Hydrological Sciences Journal
49(6).
p.987-1000
- Abstract
- Recently, substantial progress has been made in detection and observation of non-aqueous phase liquids (NAPLs) in the subsurface using different experimental techniques. However, there is still a lack of appropriate direct methods to measure the saturation of NAPL theta(NAPL)). This paper provides a guide for estimating theta(NAPL) and water content (theta(a)) in unsaturated and saturated sand based on direct measurements of soil dielectric constant (K-a) and electrical conductivity (sigma(a)) using time domain reflectometry (TDR). The results show that the previously used dielectric mixing model fails to predict, theta(NAPL) in the case of a four-phase system. A new methodology is suggested and exemplified by showing that the measured K-a... (More)
- Recently, substantial progress has been made in detection and observation of non-aqueous phase liquids (NAPLs) in the subsurface using different experimental techniques. However, there is still a lack of appropriate direct methods to measure the saturation of NAPL theta(NAPL)). This paper provides a guide for estimating theta(NAPL) and water content (theta(a)) in unsaturated and saturated sand based on direct measurements of soil dielectric constant (K-a) and electrical conductivity (sigma(a)) using time domain reflectometry (TDR). The results show that the previously used dielectric mixing model fails to predict, theta(NAPL) in the case of a four-phase system. A new methodology is suggested and exemplified by showing that the measured K-a gives accurate estimation of theta(NAPL) for a three-phase system while in a four-phase system, both sigma(a) and K-a need to be measured. The results show that using the suggested methodology, accurate predictions of theta(w) (R-2 = 0.9998) and theta(NAPL) lower than 0.20 m(3) m(-3) (average R-2 = 0.9756) are possible. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/259656
- author
- Haridy, SA
; Persson, Magnus
LU
and Berndtsson, Ronny
LU
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- time domain, LNAPL, dielectric constant, electric conductivity, water content, reflectometry
- in
- Hydrological Sciences Journal
- volume
- 49
- issue
- 6
- pages
- 987 - 1000
- publisher
- Taylor & Francis
- external identifiers
-
- wos:000225364500005
- scopus:10244226677
- ISSN
- 0262-6667
- DOI
- 10.1623/hysj.49.6.987.55729
- language
- English
- LU publication?
- yes
- id
- be0b8aff-72a5-4e22-b28a-881ed1031b2e (old id 259656)
- date added to LUP
- 2016-04-01 16:46:21
- date last changed
- 2022-10-20 23:50:40
@article{be0b8aff-72a5-4e22-b28a-881ed1031b2e,
abstract = {{Recently, substantial progress has been made in detection and observation of non-aqueous phase liquids (NAPLs) in the subsurface using different experimental techniques. However, there is still a lack of appropriate direct methods to measure the saturation of NAPL theta(NAPL)). This paper provides a guide for estimating theta(NAPL) and water content (theta(a)) in unsaturated and saturated sand based on direct measurements of soil dielectric constant (K-a) and electrical conductivity (sigma(a)) using time domain reflectometry (TDR). The results show that the previously used dielectric mixing model fails to predict, theta(NAPL) in the case of a four-phase system. A new methodology is suggested and exemplified by showing that the measured K-a gives accurate estimation of theta(NAPL) for a three-phase system while in a four-phase system, both sigma(a) and K-a need to be measured. The results show that using the suggested methodology, accurate predictions of theta(w) (R-2 = 0.9998) and theta(NAPL) lower than 0.20 m(3) m(-3) (average R-2 = 0.9756) are possible.}},
author = {{Haridy, SA and Persson, Magnus and Berndtsson, Ronny}},
issn = {{0262-6667}},
keywords = {{time domain; LNAPL; dielectric constant; electric conductivity; water content; reflectometry}},
language = {{eng}},
number = {{6}},
pages = {{987--1000}},
publisher = {{Taylor & Francis}},
series = {{Hydrological Sciences Journal}},
title = {{Estimation of LNAPL saturation in fine sand using time-domain reflectometry}},
url = {{http://dx.doi.org/10.1623/hysj.49.6.987.55729}},
doi = {{10.1623/hysj.49.6.987.55729}},
volume = {{49}},
year = {{2004}},
}