A dual-porosity model for simulating the preferential movement of water and solutes in structured porous media
A one-dimensional dual-porosity model has been developed for the purpose of studying variably saturated water flow and solute transport in structured soils or fractured rocks. The model involves two overlaying continua at the macroscopic level: a macropore or fracture pore system and a less permeabl...
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| Veröffentlicht in: | Water resources research 1993-02, Vol.29 (2), p.305-319 |
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| creator | Gerke, H.H. (U.S. Salinity Laboratory, USDA, Riverside, CA) Van Genuchten, M.T |
| description | A one-dimensional dual-porosity model has been developed for the purpose of studying variably saturated water flow and solute transport in structured soils or fractured rocks. The model involves two overlaying continua at the macroscopic level: a macropore or fracture pore system and a less permeable matrix pore system. Water in both pore systems is assumed to be mobile. Variably saturated water flow in the matrix as well as in the fracture pore system is described with the Richards' equation, and solute transport is described with the convection-dispersion equation. Transfer of water and solutes between the two pore regions is simulated by means of first-order rate equations. The mass transfer term for solute transport includes both convective and diffusive components. The formulation leads to two coupled systems of nonlinear partial differential equations which were solved numerically using the Galerkin finite element method. Simulation results demonstrate the complicated nature of solute leaching in structured, unsaturated porous media during transient water flow. Sensitivity studies show the importance of having accurate estimates of the hydraulic conductivity near the surface of soil aggregates or rock matrix blocks. The proposed model is capable of simulating preferential flow situations using parameters which can be related to physical and chemical properties of the medium |
| doi_str_mv | 10.1029/92WR02339 |
| format | Article |
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(U.S. Salinity Laboratory, USDA, Riverside, CA) ; Van Genuchten, M.T</creator><creatorcontrib>Gerke, H.H. (U.S. Salinity Laboratory, USDA, Riverside, CA) ; Van Genuchten, M.T</creatorcontrib><description>A one-dimensional dual-porosity model has been developed for the purpose of studying variably saturated water flow and solute transport in structured soils or fractured rocks. The model involves two overlaying continua at the macroscopic level: a macropore or fracture pore system and a less permeable matrix pore system. Water in both pore systems is assumed to be mobile. Variably saturated water flow in the matrix as well as in the fracture pore system is described with the Richards' equation, and solute transport is described with the convection-dispersion equation. Transfer of water and solutes between the two pore regions is simulated by means of first-order rate equations. The mass transfer term for solute transport includes both convective and diffusive components. The formulation leads to two coupled systems of nonlinear partial differential equations which were solved numerically using the Galerkin finite element method. Simulation results demonstrate the complicated nature of solute leaching in structured, unsaturated porous media during transient water flow. Sensitivity studies show the importance of having accurate estimates of the hydraulic conductivity near the surface of soil aggregates or rock matrix blocks. The proposed model is capable of simulating preferential flow situations using parameters which can be related to physical and chemical properties of the medium</description><identifier>ISSN: 0043-1397</identifier><identifier>EISSN: 1944-7973</identifier><identifier>DOI: 10.1029/92WR02339</identifier><language>eng</language><publisher>Blackwell Publishing Ltd</publisher><subject>AGUA ; DEBIT ; EAU ; GASTO ; LESSIVAGE DU SOL ; LIXIVIACION ; MATEMATICAS ; MATHEMATIQUE ; MODELE ; MODELE MATHEMATIQUE ; MODELOS ; MODELOS MATEMATICOS ; MOUVEMENT DE L'EAU DANS LE SOL ; MOVIMIENTO DEL AGUA EN EL SUELO ; PROCESOS DE TRANSPORTE EN EL SUELO ; PROPIEDADES FISICO-QUIMICAS SUELO ; PROPRIETE PHYSICOCHIMIQUE DU SOL ; SOLUTE ; SOLUTO ; TRANSPORT DANS LE SOL</subject><ispartof>Water resources research, 1993-02, Vol.29 (2), p.305-319</ispartof><rights>This paper is not subject to U.S. copyright. 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(U.S. Salinity Laboratory, USDA, Riverside, CA)</creatorcontrib><creatorcontrib>Van Genuchten, M.T</creatorcontrib><title>A dual-porosity model for simulating the preferential movement of water and solutes in structured porous media</title><title>Water resources research</title><addtitle>Water Resour. Res</addtitle><description>A one-dimensional dual-porosity model has been developed for the purpose of studying variably saturated water flow and solute transport in structured soils or fractured rocks. The model involves two overlaying continua at the macroscopic level: a macropore or fracture pore system and a less permeable matrix pore system. Water in both pore systems is assumed to be mobile. Variably saturated water flow in the matrix as well as in the fracture pore system is described with the Richards' equation, and solute transport is described with the convection-dispersion equation. Transfer of water and solutes between the two pore regions is simulated by means of first-order rate equations. The mass transfer term for solute transport includes both convective and diffusive components. The formulation leads to two coupled systems of nonlinear partial differential equations which were solved numerically using the Galerkin finite element method. Simulation results demonstrate the complicated nature of solute leaching in structured, unsaturated porous media during transient water flow. Sensitivity studies show the importance of having accurate estimates of the hydraulic conductivity near the surface of soil aggregates or rock matrix blocks. The proposed model is capable of simulating preferential flow situations using parameters which can be related to physical and chemical properties of the medium</description><subject>AGUA</subject><subject>DEBIT</subject><subject>EAU</subject><subject>GASTO</subject><subject>LESSIVAGE DU SOL</subject><subject>LIXIVIACION</subject><subject>MATEMATICAS</subject><subject>MATHEMATIQUE</subject><subject>MODELE</subject><subject>MODELE MATHEMATIQUE</subject><subject>MODELOS</subject><subject>MODELOS MATEMATICOS</subject><subject>MOUVEMENT DE L'EAU DANS LE SOL</subject><subject>MOVIMIENTO DEL AGUA EN EL SUELO</subject><subject>PROCESOS DE TRANSPORTE EN EL SUELO</subject><subject>PROPIEDADES FISICO-QUIMICAS SUELO</subject><subject>PROPRIETE PHYSICOCHIMIQUE DU SOL</subject><subject>SOLUTE</subject><subject>SOLUTO</subject><subject>TRANSPORT DANS LE SOL</subject><issn>0043-1397</issn><issn>1944-7973</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1993</creationdate><recordtype>article</recordtype><recordid>eNp1kM1v3CAQxVHVSN2mOfTaE6dKPTgBgw0c01XzIUWptEm0R4TNkNJiewu4yf73YeUot57ejPR7o_cGoc-UnFJSqzNVbzekZky9QyuqOK-EEuw9WhHCWUWZEh_Qx5R-E0J504oVGs-xnU2odlOcks97PEwWAnZTxMkPczDZj484_wK8i-Agwpi9CYX6B0OZ8eTwk8kQsRktTlOYMyTsR5xynPs8R7D4cHpOeADrzSd05ExIcPKqx-jh4sf9-qq6-Xl5vT6_qQyXXFYd71wroQNrRdczQgQVxHayKypt64RyknDedLSvJXW9oGVRpqY1IQ1VPTtGX5e7uzj9nSFlPfjUQwhmhBJGU9YK0TBewG8L2Jf-qVTUu-gHE_eaEn34qH77aGHPFvbJB9j_H9TbzXrTKCmLo1ocPmV4fnOY-Ee3golGb28v9br9vqFN3ehDmi8L78ykzWP0ST_cKU5oKwh7Aan1jys</recordid><startdate>199302</startdate><enddate>199302</enddate><creator>Gerke, H.H. (U.S. Salinity Laboratory, USDA, Riverside, CA)</creator><creator>Van Genuchten, M.T</creator><general>Blackwell Publishing Ltd</general><scope>FBQ</scope><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QH</scope></search><sort><creationdate>199302</creationdate><title>A dual-porosity model for simulating the preferential movement of water and solutes in structured porous media</title><author>Gerke, H.H. (U.S. Salinity Laboratory, USDA, Riverside, CA) ; Van Genuchten, M.T</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4848-b4bf68ebedd7bc3007170db8b7178d6f79f80445b1c281fc714459a21200519c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1993</creationdate><topic>AGUA</topic><topic>DEBIT</topic><topic>EAU</topic><topic>GASTO</topic><topic>LESSIVAGE DU SOL</topic><topic>LIXIVIACION</topic><topic>MATEMATICAS</topic><topic>MATHEMATIQUE</topic><topic>MODELE</topic><topic>MODELE MATHEMATIQUE</topic><topic>MODELOS</topic><topic>MODELOS MATEMATICOS</topic><topic>MOUVEMENT DE L'EAU DANS LE SOL</topic><topic>MOVIMIENTO DEL AGUA EN EL SUELO</topic><topic>PROCESOS DE TRANSPORTE EN EL SUELO</topic><topic>PROPIEDADES FISICO-QUIMICAS SUELO</topic><topic>PROPRIETE PHYSICOCHIMIQUE DU SOL</topic><topic>SOLUTE</topic><topic>SOLUTO</topic><topic>TRANSPORT DANS LE SOL</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gerke, H.H. (U.S. Salinity Laboratory, USDA, Riverside, CA)</creatorcontrib><creatorcontrib>Van Genuchten, M.T</creatorcontrib><collection>AGRIS</collection><collection>Istex</collection><collection>CrossRef</collection><collection>Aqualine</collection><jtitle>Water resources research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gerke, H.H. (U.S. Salinity Laboratory, USDA, Riverside, CA)</au><au>Van Genuchten, M.T</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A dual-porosity model for simulating the preferential movement of water and solutes in structured porous media</atitle><jtitle>Water resources research</jtitle><addtitle>Water Resour. Res</addtitle><date>1993-02</date><risdate>1993</risdate><volume>29</volume><issue>2</issue><spage>305</spage><epage>319</epage><pages>305-319</pages><issn>0043-1397</issn><eissn>1944-7973</eissn><abstract>A one-dimensional dual-porosity model has been developed for the purpose of studying variably saturated water flow and solute transport in structured soils or fractured rocks. The model involves two overlaying continua at the macroscopic level: a macropore or fracture pore system and a less permeable matrix pore system. Water in both pore systems is assumed to be mobile. Variably saturated water flow in the matrix as well as in the fracture pore system is described with the Richards' equation, and solute transport is described with the convection-dispersion equation. Transfer of water and solutes between the two pore regions is simulated by means of first-order rate equations. The mass transfer term for solute transport includes both convective and diffusive components. The formulation leads to two coupled systems of nonlinear partial differential equations which were solved numerically using the Galerkin finite element method. Simulation results demonstrate the complicated nature of solute leaching in structured, unsaturated porous media during transient water flow. Sensitivity studies show the importance of having accurate estimates of the hydraulic conductivity near the surface of soil aggregates or rock matrix blocks. The proposed model is capable of simulating preferential flow situations using parameters which can be related to physical and chemical properties of the medium</abstract><pub>Blackwell Publishing Ltd</pub><doi>10.1029/92WR02339</doi><tpages>15</tpages></addata></record> |
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| identifier | ISSN: 0043-1397 |
| ispartof | Water resources research, 1993-02, Vol.29 (2), p.305-319 |
| issn | 0043-1397 1944-7973 |
| language | eng |
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| source | Access via Wiley Online Library |
| subjects | AGUA DEBIT EAU GASTO LESSIVAGE DU SOL LIXIVIACION MATEMATICAS MATHEMATIQUE MODELE MODELE MATHEMATIQUE MODELOS MODELOS MATEMATICOS MOUVEMENT DE L'EAU DANS LE SOL MOVIMIENTO DEL AGUA EN EL SUELO PROCESOS DE TRANSPORTE EN EL SUELO PROPIEDADES FISICO-QUIMICAS SUELO PROPRIETE PHYSICOCHIMIQUE DU SOL SOLUTE SOLUTO TRANSPORT DANS LE SOL |
| title | A dual-porosity model for simulating the preferential movement of water and solutes in structured porous media |
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