approach for estimating the shrinkage geometry factor at a moisture content
Soil shrinkage is characterized, along with the shrinkage curve, by a partition of the volume change of the soil matrix between contributions of cracks and soil subsidence. This partition is determined by the shrinkage geometry factor (r(s)). Knowledge of the value of r(s) is important for the consi...
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Veröffentlicht in: | Soil Science Society of America journal 2004-11, Vol.68 (6), p.1807-1817 |
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description | Soil shrinkage is characterized, along with the shrinkage curve, by a partition of the volume change of the soil matrix between contributions of cracks and soil subsidence. This partition is determined by the shrinkage geometry factor (r(s)). Knowledge of the value of r(s) is important for the consideration of water and solute transport in swelling and cracking soils. The r(s) concept was recently used for the generalization of flow equations in the case of the axially symmetric two-dimensional deformation of shrink-swell soils. Sufficient accuracy of the r(s) value is very essential for all these applications. However, the theoretical definition and available measurement method of the r(s) factor include some implicit assumptions that are disturbed in real conditions. These disturbances, which are not accounted for in r(s) measurements, can lead to distortion of the r(s) value. The objectives of the work are: to explicitly formulate the assumptions; to introduce a new presentation of the r(s) concept based on a comparison between different shrinkage curves of a soil; to suggest an approach for estimating the r(s) values corrected by taking into account the disturbance of one of the assumptions; and to experimentally illustrate the approach using the simplest case of pure-clay paste samples when they dry, shrink, and crack. The results show the necessity and practical possibility of considering the r(s) factor as a function of soil moisture and introducing to the factor the multiplicative correction that is connected with accounting for possible macrocracks in soil samples to be used for experimental estimation of the r(s) factor. |
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This partition is determined by the shrinkage geometry factor (r(s)). Knowledge of the value of r(s) is important for the consideration of water and solute transport in swelling and cracking soils. The r(s) concept was recently used for the generalization of flow equations in the case of the axially symmetric two-dimensional deformation of shrink-swell soils. Sufficient accuracy of the r(s) value is very essential for all these applications. However, the theoretical definition and available measurement method of the r(s) factor include some implicit assumptions that are disturbed in real conditions. These disturbances, which are not accounted for in r(s) measurements, can lead to distortion of the r(s) value. The objectives of the work are: to explicitly formulate the assumptions; to introduce a new presentation of the r(s) concept based on a comparison between different shrinkage curves of a soil; to suggest an approach for estimating the r(s) values corrected by taking into account the disturbance of one of the assumptions; and to experimentally illustrate the approach using the simplest case of pure-clay paste samples when they dry, shrink, and crack. The results show the necessity and practical possibility of considering the r(s) factor as a function of soil moisture and introducing to the factor the multiplicative correction that is connected with accounting for possible macrocracks in soil samples to be used for experimental estimation of the r(s) factor.</description><identifier>ISSN: 0361-5995</identifier><identifier>EISSN: 1435-0661</identifier><identifier>DOI: 10.2136/sssaj2004.1807</identifier><identifier>CODEN: SSSJD4</identifier><language>eng</language><publisher>Madison: Soil Science Society</publisher><subject>Agronomy. Soil science and plant productions ; Biological and medical sciences ; cracking ; Earth sciences ; Earth, ocean, space ; Estimating techniques ; Exact sciences and technology ; Fundamental and applied biological sciences. Psychology ; Mathematical analysis ; mathematical models ; Moisture content ; Physical properties ; Physics, chemistry, biochemistry and biology of agricultural and forest soils ; shrinkage ; soil ; Soil erosion ; Soil moisture ; Soil science ; Soil sciences ; soil water content ; Soils ; Solute transport ; Structure, texture, density, mechanical behavior. 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This partition is determined by the shrinkage geometry factor (r(s)). Knowledge of the value of r(s) is important for the consideration of water and solute transport in swelling and cracking soils. The r(s) concept was recently used for the generalization of flow equations in the case of the axially symmetric two-dimensional deformation of shrink-swell soils. Sufficient accuracy of the r(s) value is very essential for all these applications. However, the theoretical definition and available measurement method of the r(s) factor include some implicit assumptions that are disturbed in real conditions. These disturbances, which are not accounted for in r(s) measurements, can lead to distortion of the r(s) value. The objectives of the work are: to explicitly formulate the assumptions; to introduce a new presentation of the r(s) concept based on a comparison between different shrinkage curves of a soil; to suggest an approach for estimating the r(s) values corrected by taking into account the disturbance of one of the assumptions; and to experimentally illustrate the approach using the simplest case of pure-clay paste samples when they dry, shrink, and crack. The results show the necessity and practical possibility of considering the r(s) factor as a function of soil moisture and introducing to the factor the multiplicative correction that is connected with accounting for possible macrocracks in soil samples to be used for experimental estimation of the r(s) factor.</description><subject>Agronomy. Soil science and plant productions</subject><subject>Biological and medical sciences</subject><subject>cracking</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Estimating techniques</subject><subject>Exact sciences and technology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Mathematical analysis</subject><subject>mathematical models</subject><subject>Moisture content</subject><subject>Physical properties</subject><subject>Physics, chemistry, biochemistry and biology of agricultural and forest soils</subject><subject>shrinkage</subject><subject>soil</subject><subject>Soil erosion</subject><subject>Soil moisture</subject><subject>Soil science</subject><subject>Soil sciences</subject><subject>soil water content</subject><subject>Soils</subject><subject>Solute transport</subject><subject>Structure, texture, density, mechanical behavior. 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Soil science and plant productions</topic><topic>Biological and medical sciences</topic><topic>cracking</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Estimating techniques</topic><topic>Exact sciences and technology</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Mathematical analysis</topic><topic>mathematical models</topic><topic>Moisture content</topic><topic>Physical properties</topic><topic>Physics, chemistry, biochemistry and biology of agricultural and forest soils</topic><topic>shrinkage</topic><topic>soil</topic><topic>Soil erosion</topic><topic>Soil moisture</topic><topic>Soil science</topic><topic>Soil sciences</topic><topic>soil water content</topic><topic>Soils</topic><topic>Solute transport</topic><topic>Structure, texture, density, mechanical behavior. Heat and gas exchanges</topic><topic>Surficial geology</topic><topic>swelling (materials)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chertkov, V.Y</creatorcontrib><creatorcontrib>Ravina, I</creatorcontrib><creatorcontrib>Zadoenko, V</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Environment Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Agricultural Science Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>STEM Database</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central</collection><collection>Engineering Research Database</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Agriculture Science Database</collection><collection>ProQuest research library</collection><collection>ProQuest Science Journals</collection><collection>Engineering Database</collection><collection>Research Library (Corporate)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environmental Science Database</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Engineering collection</collection><collection>Environmental Science Collection</collection><collection>ProQuest Central Basic</collection><collection>University of Michigan</collection><collection>SIRS Editorial</collection><collection>Environment Abstracts</collection><collection>Civil Engineering Abstracts</collection><jtitle>Soil Science Society of America journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chertkov, V.Y</au><au>Ravina, I</au><au>Zadoenko, V</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>approach for estimating the shrinkage geometry factor at a moisture content</atitle><jtitle>Soil Science Society of America journal</jtitle><date>2004-11</date><risdate>2004</risdate><volume>68</volume><issue>6</issue><spage>1807</spage><epage>1817</epage><pages>1807-1817</pages><issn>0361-5995</issn><eissn>1435-0661</eissn><coden>SSSJD4</coden><abstract>Soil shrinkage is characterized, along with the shrinkage curve, by a partition of the volume change of the soil matrix between contributions of cracks and soil subsidence. This partition is determined by the shrinkage geometry factor (r(s)). Knowledge of the value of r(s) is important for the consideration of water and solute transport in swelling and cracking soils. The r(s) concept was recently used for the generalization of flow equations in the case of the axially symmetric two-dimensional deformation of shrink-swell soils. Sufficient accuracy of the r(s) value is very essential for all these applications. However, the theoretical definition and available measurement method of the r(s) factor include some implicit assumptions that are disturbed in real conditions. These disturbances, which are not accounted for in r(s) measurements, can lead to distortion of the r(s) value. The objectives of the work are: to explicitly formulate the assumptions; to introduce a new presentation of the r(s) concept based on a comparison between different shrinkage curves of a soil; to suggest an approach for estimating the r(s) values corrected by taking into account the disturbance of one of the assumptions; and to experimentally illustrate the approach using the simplest case of pure-clay paste samples when they dry, shrink, and crack. The results show the necessity and practical possibility of considering the r(s) factor as a function of soil moisture and introducing to the factor the multiplicative correction that is connected with accounting for possible macrocracks in soil samples to be used for experimental estimation of the r(s) factor.</abstract><cop>Madison</cop><pub>Soil Science Society</pub><doi>10.2136/sssaj2004.1807</doi><tpages>11</tpages></addata></record> |
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subjects | Agronomy. Soil science and plant productions Biological and medical sciences cracking Earth sciences Earth, ocean, space Estimating techniques Exact sciences and technology Fundamental and applied biological sciences. Psychology Mathematical analysis mathematical models Moisture content Physical properties Physics, chemistry, biochemistry and biology of agricultural and forest soils shrinkage soil Soil erosion Soil moisture Soil science Soil sciences soil water content Soils Solute transport Structure, texture, density, mechanical behavior. Heat and gas exchanges Surficial geology swelling (materials) |
title | approach for estimating the shrinkage geometry factor at a moisture content |
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