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Compatibility of methods used for soil water repellency determination for organic and organo-mineral soils

Ewa Papierowska, Wojciech Matysiak, Jan Szatyłowicz, Guillaume Debaene, Emilia Urbanek Orcid Logo, Barbara Kalisz, Andrzej Łachacz

Geoderma, Volume: 314, Pages: 221 - 231

Swansea University Author: Emilia Urbanek Orcid Logo

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DOI (Published version): 10.1016/j.geoderma.2017.11.012

Abstract

Soil water repellency (i.e. hydrophobicity, SWR) is a common soil phenomenon inhibiting water infiltration and water movement in the soil. SWR has significant hydrological implications for enhanced overland and preferential water flows and erosion. Several methods are used to determine the degree of...

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Published in: Geoderma
ISSN: 00167061
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa36616
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spelling 2019-05-30T12:19:12.4136906 v2 36616 2017-11-06 Compatibility of methods used for soil water repellency determination for organic and organo-mineral soils 6d7e46bd913e12897d7f222ca78a718f 0000-0002-7748-4416 Emilia Urbanek Emilia Urbanek true false 2017-11-06 SGE Soil water repellency (i.e. hydrophobicity, SWR) is a common soil phenomenon inhibiting water infiltration and water movement in the soil. SWR has significant hydrological implications for enhanced overland and preferential water flows and erosion. Several methods are used to determine the degree of SWR. The methods are typically chosen based on their suitability for field or laboratory work, as well as time and resources availability. Unfortunately, each measurement method has a different analytical approach, hence the direct comparison between results from different methods is not possible. A faster and statistically sound technique for converting results is needed, especially to convert results from field applicable techniques to contact angle (CA) value, which is a valuable parameter for soil hydraulic modelling. The aim of this paper is to define a reliable compliance between methods defined on a statistical approach basis (weighted kappa coefficient κw), which will allow to determine the CA value based on straightforward tests, such as water drop penetration time (WDPT) and molarity of an ethanol droplet (MED). For this purpose, we measured SWR in 106 organic and organo-mineral soils collected from different locations in North East Poland using four common methods. The sessile drop and Wilhelmy plate laboratory-based methods were used to determine the CA between water and the solid phase. The other two tests are common field methods for assessing SWR by measuring water infiltration time (WDPT) and the highest surface tension of ethanol-water droplet infiltration into the soil (MED). The results revealed that the weighted kappa coefficient, when assumed as a measurement of an observer's compliance, indicates a strong relationship (κw = 0.84) between the average CA (CAav), measured with the sessile drop method, and the median value of the WDPT (WDPTme). Based on the results, we can conclude that hydrophilic samples with WDPT < 5 s have the average CA values below 40°, while extremely hydrophobic samples with WDPT above 3600 s have CA values higher than 130°. This is a proof that these tests can be a good estimator of CA value for SWR determination in the laboratory or the field. Journal Article Geoderma 314 221 231 00167061 soil, soil water repellency, soil hydrophobicity 15 3 2018 2018-03-15 10.1016/j.geoderma.2017.11.012 COLLEGE NANME Geography COLLEGE CODE SGE Swansea University 2019-05-30T12:19:12.4136906 2017-11-06T08:16:25.5757976 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography Ewa Papierowska 1 Wojciech Matysiak 2 Jan Szatyłowicz 3 Guillaume Debaene 4 Emilia Urbanek 0000-0002-7748-4416 5 Barbara Kalisz 6 Andrzej Łachacz 7 0036616-13022018144315.pdf Compatibility_6_11_2017_black.pdf 2018-02-13T14:43:15.1070000 Output 694756 application/pdf Accepted Manuscript true 2018-11-15T00:00:00.0000000 true eng
title Compatibility of methods used for soil water repellency determination for organic and organo-mineral soils
spellingShingle Compatibility of methods used for soil water repellency determination for organic and organo-mineral soils
Emilia Urbanek
title_short Compatibility of methods used for soil water repellency determination for organic and organo-mineral soils
title_full Compatibility of methods used for soil water repellency determination for organic and organo-mineral soils
title_fullStr Compatibility of methods used for soil water repellency determination for organic and organo-mineral soils
title_full_unstemmed Compatibility of methods used for soil water repellency determination for organic and organo-mineral soils
title_sort Compatibility of methods used for soil water repellency determination for organic and organo-mineral soils
author_id_str_mv 6d7e46bd913e12897d7f222ca78a718f
author_id_fullname_str_mv 6d7e46bd913e12897d7f222ca78a718f_***_Emilia Urbanek
author Emilia Urbanek
author2 Ewa Papierowska
Wojciech Matysiak
Jan Szatyłowicz
Guillaume Debaene
Emilia Urbanek
Barbara Kalisz
Andrzej Łachacz
format Journal article
container_title Geoderma
container_volume 314
container_start_page 221
publishDate 2018
institution Swansea University
issn 00167061
doi_str_mv 10.1016/j.geoderma.2017.11.012
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Geography{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Geography
document_store_str 1
active_str 0
description Soil water repellency (i.e. hydrophobicity, SWR) is a common soil phenomenon inhibiting water infiltration and water movement in the soil. SWR has significant hydrological implications for enhanced overland and preferential water flows and erosion. Several methods are used to determine the degree of SWR. The methods are typically chosen based on their suitability for field or laboratory work, as well as time and resources availability. Unfortunately, each measurement method has a different analytical approach, hence the direct comparison between results from different methods is not possible. A faster and statistically sound technique for converting results is needed, especially to convert results from field applicable techniques to contact angle (CA) value, which is a valuable parameter for soil hydraulic modelling. The aim of this paper is to define a reliable compliance between methods defined on a statistical approach basis (weighted kappa coefficient κw), which will allow to determine the CA value based on straightforward tests, such as water drop penetration time (WDPT) and molarity of an ethanol droplet (MED). For this purpose, we measured SWR in 106 organic and organo-mineral soils collected from different locations in North East Poland using four common methods. The sessile drop and Wilhelmy plate laboratory-based methods were used to determine the CA between water and the solid phase. The other two tests are common field methods for assessing SWR by measuring water infiltration time (WDPT) and the highest surface tension of ethanol-water droplet infiltration into the soil (MED). The results revealed that the weighted kappa coefficient, when assumed as a measurement of an observer's compliance, indicates a strong relationship (κw = 0.84) between the average CA (CAav), measured with the sessile drop method, and the median value of the WDPT (WDPTme). Based on the results, we can conclude that hydrophilic samples with WDPT < 5 s have the average CA values below 40°, while extremely hydrophobic samples with WDPT above 3600 s have CA values higher than 130°. This is a proof that these tests can be a good estimator of CA value for SWR determination in the laboratory or the field.
published_date 2018-03-15T03:45:54Z
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score 11.013731

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