An experimental study on the determination of dispersion coefficient in layered soils
Dispersivity is a measurable parameter in soil porous media that is used for studying the transport of contaminants to groundwater. The value of this parameter depends on various factors, including the kind of porous media (homogeneous or heterogeneous), flow velocity, initial contaminant concentrat...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2022-03-01
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| Series: | Water Supply |
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| Online Access: | http://ws.iwaponline.com/content/22/3/2377 |
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| author | Hamed Mahdipanah Askari Tashakori Samad Emamgholizadeh Eisa Maroufpoor |
| author_facet | Hamed Mahdipanah Askari Tashakori Samad Emamgholizadeh Eisa Maroufpoor |
| author_sort | Hamed Mahdipanah |
| collection | DOAJ |
| description | Dispersivity is a measurable parameter in soil porous media that is used for studying the transport of contaminants to groundwater. The value of this parameter depends on various factors, including the kind of porous media (homogeneous or heterogeneous), flow velocity, initial contaminant concentration, travel distance, and sampling method. A physical model with dimensions of 0.10 m in width, 0.80 m in height, and 1.10 m in length was constructed to investigate the effects of these parameters on the dispersivity value. The stratified soil used consisted of three 20-cm-thick layers containing fine-grained, medium-grained, and coarse-grained soil. Sodium chloride solutions with electrical conductivity values of 10, 14, and 19 dS/m were used as the contaminants. Flow was forced through the layered heterogeneous soils at three discharge velocities of 17.58, 22.02, and 26.18 × 10−5 m/s. The point and mixed sampling methods were used. The results indicated that the soil dispersivity values in layered heterogeneous soils and homogeneous soil were influenced by contaminant concentration, flow velocity, and travel distance. Moreover, the dispersivity values obtained by point sampling were lower than those obtained using the mixed sampling method, and the mean dispersivity value in the layered heterogeneous soils was lower than that of the homogeneous soil. HIGHLIGHT
In this paper, determination of the dispersion coefficient in layered soils was studied. To the best of our knowledge no studies have been done in a layered soils.; |
| first_indexed | 2024-04-14T06:59:02Z |
| format | Article |
| id | doaj.art-6a6af47f362b4eb5b72c9ef55f82bd20 |
| institution | Directory Open Access Journal |
| issn | 1606-9749 1607-0798 |
| language | English |
| last_indexed | 2024-04-14T06:59:02Z |
| publishDate | 2022-03-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Supply |
| spelling | doaj.art-6a6af47f362b4eb5b72c9ef55f82bd202022-12-22T02:06:48ZengIWA PublishingWater Supply1606-97491607-07982022-03-012232377239410.2166/ws.2021.359359An experimental study on the determination of dispersion coefficient in layered soilsHamed Mahdipanah0Askari Tashakori1Samad Emamgholizadeh2Eisa Maroufpoor3 Department of Water Science and Engineering, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran Department of Water Science and Engineering, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran Department of Water and Environmental Engineering, Faculty of Civil Engineering, Shahrood University of Technology Shahroud, Semnan Province, Iran Department of Water Engineering, University of Kurdistan, Sanandaj, Iran Dispersivity is a measurable parameter in soil porous media that is used for studying the transport of contaminants to groundwater. The value of this parameter depends on various factors, including the kind of porous media (homogeneous or heterogeneous), flow velocity, initial contaminant concentration, travel distance, and sampling method. A physical model with dimensions of 0.10 m in width, 0.80 m in height, and 1.10 m in length was constructed to investigate the effects of these parameters on the dispersivity value. The stratified soil used consisted of three 20-cm-thick layers containing fine-grained, medium-grained, and coarse-grained soil. Sodium chloride solutions with electrical conductivity values of 10, 14, and 19 dS/m were used as the contaminants. Flow was forced through the layered heterogeneous soils at three discharge velocities of 17.58, 22.02, and 26.18 × 10−5 m/s. The point and mixed sampling methods were used. The results indicated that the soil dispersivity values in layered heterogeneous soils and homogeneous soil were influenced by contaminant concentration, flow velocity, and travel distance. Moreover, the dispersivity values obtained by point sampling were lower than those obtained using the mixed sampling method, and the mean dispersivity value in the layered heterogeneous soils was lower than that of the homogeneous soil. HIGHLIGHT In this paper, determination of the dispersion coefficient in layered soils was studied. To the best of our knowledge no studies have been done in a layered soils.;http://ws.iwaponline.com/content/22/3/2377contaminant transportgroundwater quality and contaminationheterogeneous soilleachingporous mediasoil-water quality |
| spellingShingle | Hamed Mahdipanah Askari Tashakori Samad Emamgholizadeh Eisa Maroufpoor An experimental study on the determination of dispersion coefficient in layered soils Water Supply contaminant transport groundwater quality and contamination heterogeneous soil leaching porous media soil-water quality |
| title | An experimental study on the determination of dispersion coefficient in layered soils |
| title_full | An experimental study on the determination of dispersion coefficient in layered soils |
| title_fullStr | An experimental study on the determination of dispersion coefficient in layered soils |
| title_full_unstemmed | An experimental study on the determination of dispersion coefficient in layered soils |
| title_short | An experimental study on the determination of dispersion coefficient in layered soils |
| title_sort | experimental study on the determination of dispersion coefficient in layered soils |
| topic | contaminant transport groundwater quality and contamination heterogeneous soil leaching porous media soil-water quality |
| url | http://ws.iwaponline.com/content/22/3/2377 |
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