Soil–water characteristic curves of extracellular polymeric substances-affected soils and sensitivity analyses of correlated parameters

Quantifying the ways in which biological activity may alter the hydraulic properties of soils (the soil-water characteristic curves; SWCCs) is vital for understanding and engineering water pollution and supply systems. The study used centrifugation and a sand funnel method to determine the SWCCs of...

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Autores principales:	Han Zhang, Jianmin Bian, Hanli Wan, Nan Wei, Yuxi Ma
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	eps parameter sensitivity analysis soil–water curve van genuchten model Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
Acceso en línea:	https://doaj.org/article/77dfd6b73e094e2f85d1f7dc42777556
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spelling	oai:doaj.org-article:77dfd6b73e094e2f85d1f7dc427775562021-11-06T07:12:58ZSoil–water characteristic curves of extracellular polymeric substances-affected soils and sensitivity analyses of correlated parameters1606-97491607-079810.2166/ws.2020.377https://doaj.org/article/77dfd6b73e094e2f85d1f7dc427775562021-05-01T00:00:00Zhttp://ws.iwaponline.com/content/21/3/1323https://doaj.org/toc/1606-9749https://doaj.org/toc/1607-0798Quantifying the ways in which biological activity may alter the hydraulic properties of soils (the soil-water characteristic curves; SWCCs) is vital for understanding and engineering water pollution and supply systems. The study used centrifugation and a sand funnel method to determine the SWCCs of pure sandy soils with different particle sizes and sandy soils mixed with different extracellular polymeric substance (EPS) analogs. The sensitivity of correlated parameters for SWCCs obtained using a van Genuchten (VG) model was analyzed by single-factor perturbation analysis. The results show the following. (1) Fine sand has the strongest water retention ability. (2) The more polysaccharide there is in the media, the stronger its water-holding capacity. Polysaccharide not only has its strong water-holding capacity, but also changes the structure of medium to increase water-holding capacity. The humic acid and protein components had little effect on the hydrodynamic properties of fine sandy soil. (3) Sensitivity analyses revealed that the saturated water content, θs, greatly affected the ability of solute transport to reach equilibrium concentrations. Therefore, it is essential to define the range of media particles and component content, and ensure the accuracy of VG model parameters in the practical application of soil media affected by biological activity. HIGHLIGHTS Soil–water characteristics were explored using a van Genuchten model in Hydrus 1-D.; Adding different extracellular polymeric analogs to soils had different impacts on water content and porosity.; The addition of a polysaccharide had the greatest impact on hydraulic parameters.;Han ZhangJianmin BianHanli WanNan WeiYuxi MaIWA Publishingarticleepsparameter sensitivity analysissoil–water curvevan genuchten modelWater supply for domestic and industrial purposesTD201-500River, lake, and water-supply engineering (General)TC401-506ENWater Supply, Vol 21, Iss 3, Pp 1323-1333 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	eps parameter sensitivity analysis soil–water curve van genuchten model Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
spellingShingle	eps parameter sensitivity analysis soil–water curve van genuchten model Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506 Han Zhang Jianmin Bian Hanli Wan Nan Wei Yuxi Ma Soil–water characteristic curves of extracellular polymeric substances-affected soils and sensitivity analyses of correlated parameters
description	Quantifying the ways in which biological activity may alter the hydraulic properties of soils (the soil-water characteristic curves; SWCCs) is vital for understanding and engineering water pollution and supply systems. The study used centrifugation and a sand funnel method to determine the SWCCs of pure sandy soils with different particle sizes and sandy soils mixed with different extracellular polymeric substance (EPS) analogs. The sensitivity of correlated parameters for SWCCs obtained using a van Genuchten (VG) model was analyzed by single-factor perturbation analysis. The results show the following. (1) Fine sand has the strongest water retention ability. (2) The more polysaccharide there is in the media, the stronger its water-holding capacity. Polysaccharide not only has its strong water-holding capacity, but also changes the structure of medium to increase water-holding capacity. The humic acid and protein components had little effect on the hydrodynamic properties of fine sandy soil. (3) Sensitivity analyses revealed that the saturated water content, θs, greatly affected the ability of solute transport to reach equilibrium concentrations. Therefore, it is essential to define the range of media particles and component content, and ensure the accuracy of VG model parameters in the practical application of soil media affected by biological activity. HIGHLIGHTS Soil–water characteristics were explored using a van Genuchten model in Hydrus 1-D.; Adding different extracellular polymeric analogs to soils had different impacts on water content and porosity.; The addition of a polysaccharide had the greatest impact on hydraulic parameters.;
format	article
author	Han Zhang Jianmin Bian Hanli Wan Nan Wei Yuxi Ma
author_facet	Han Zhang Jianmin Bian Hanli Wan Nan Wei Yuxi Ma
author_sort	Han Zhang
title	Soil–water characteristic curves of extracellular polymeric substances-affected soils and sensitivity analyses of correlated parameters
title_short	Soil–water characteristic curves of extracellular polymeric substances-affected soils and sensitivity analyses of correlated parameters
title_full	Soil–water characteristic curves of extracellular polymeric substances-affected soils and sensitivity analyses of correlated parameters
title_fullStr	Soil–water characteristic curves of extracellular polymeric substances-affected soils and sensitivity analyses of correlated parameters
title_full_unstemmed	Soil–water characteristic curves of extracellular polymeric substances-affected soils and sensitivity analyses of correlated parameters
title_sort	soil–water characteristic curves of extracellular polymeric substances-affected soils and sensitivity analyses of correlated parameters
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/77dfd6b73e094e2f85d1f7dc42777556
work_keys_str_mv	AT hanzhang soilwatercharacteristiccurvesofextracellularpolymericsubstancesaffectedsoilsandsensitivityanalysesofcorrelatedparameters AT jianminbian soilwatercharacteristiccurvesofextracellularpolymericsubstancesaffectedsoilsandsensitivityanalysesofcorrelatedparameters AT hanliwan soilwatercharacteristiccurvesofextracellularpolymericsubstancesaffectedsoilsandsensitivityanalysesofcorrelatedparameters AT nanwei soilwatercharacteristiccurvesofextracellularpolymericsubstancesaffectedsoilsandsensitivityanalysesofcorrelatedparameters AT yuxima soilwatercharacteristiccurvesofextracellularpolymericsubstancesaffectedsoilsandsensitivityanalysesofcorrelatedparameters
_version_	1718443803263631360

Soil–water characteristic curves of extracellular polymeric substances-affected soils and sensitivity analyses of correlated parameters

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