Revisiting Vereecken Pedotransfer Functions: Introducing a Closed-Form Hydraulic Model
We revisited the Vereecken database, which has been used to derive pedotransfer functions (PTFs) to estimate the soil hydraulic parameters of Belgian soils. We developed new PTFs based on the Mualem-van Genuchten model, constraining m = 1 - 1/n and using fewer parameters. The goodness-of-fit was sim...
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| Veröffentlicht in: | Vadose zone journal 2009-02, Vol.8 (1), p.86-95 |
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| creator | Weynants, M Vereecken, H Javaux, M |
| description | We revisited the Vereecken database, which has been used to derive pedotransfer functions (PTFs) to estimate the soil hydraulic parameters of Belgian soils. We developed new PTFs based on the Mualem-van Genuchten model, constraining m = 1 - 1/n and using fewer parameters. The goodness-of-fit was similar to the one originally obtained by Vereecken. We used a one-step procedure that allows direct quantification of the correlation matrix and the uncertainties of the estimated parameter values. The coefficients of the new PTFs were estimated using a global search algorithm and they were validated against independent data. The PTFs have a wider range of applicability since: (i) they allow the use of the closed-form solution of the unsaturated hydraulic conductivity in the Mualem-van Genuchten model; and (ii) they consider the effect of macroporosity. We determined that the hydraulic conductivity measured close to saturation could not be estimated based on the available estimators; however, the hydraulic conductivity in the matrix domain was predicted with high accuracy. |
| doi_str_mv | 10.2136/vzj2008.0062 |
| format | Article |
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We developed new PTFs based on the Mualem-van Genuchten model, constraining m = 1 - 1/n and using fewer parameters. The goodness-of-fit was similar to the one originally obtained by Vereecken. We used a one-step procedure that allows direct quantification of the correlation matrix and the uncertainties of the estimated parameter values. The coefficients of the new PTFs were estimated using a global search algorithm and they were validated against independent data. The PTFs have a wider range of applicability since: (i) they allow the use of the closed-form solution of the unsaturated hydraulic conductivity in the Mualem-van Genuchten model; and (ii) they consider the effect of macroporosity. We determined that the hydraulic conductivity measured close to saturation could not be estimated based on the available estimators; however, the hydraulic conductivity in the matrix domain was predicted with high accuracy.</description><identifier>ISSN: 1539-1663</identifier><identifier>EISSN: 1539-1663</identifier><identifier>DOI: 10.2136/vzj2008.0062</identifier><language>eng</language><publisher>Madison: Soil Science Society of America</publisher><subject>algorithms ; Belgium ; bulk density ; data bases ; data processing ; Europe ; Flanders ; forest soils ; Gardner model ; hydraulic conductivity ; mapping ; mathematical models ; mathematics and statistics ; moisture ; northern Belgium ; optimization ; pedotransfer functions ; preferential flow ; saturation ; soil hydraulic properties ; soil surveys ; soils ; surveys ; uncertainty ; unsaturated hydraulic conductivity ; unsaturated zone ; vadose zone ; Vereecken Data Base ; Vereecken database ; Vereecken pedotransfer functions ; Western Europe</subject><ispartof>Vadose zone journal, 2009-02, Vol.8 (1), p.86-95</ispartof><rights>GeoRef, Copyright 2020, American Geosciences Institute. 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We developed new PTFs based on the Mualem-van Genuchten model, constraining m = 1 - 1/n and using fewer parameters. The goodness-of-fit was similar to the one originally obtained by Vereecken. We used a one-step procedure that allows direct quantification of the correlation matrix and the uncertainties of the estimated parameter values. The coefficients of the new PTFs were estimated using a global search algorithm and they were validated against independent data. The PTFs have a wider range of applicability since: (i) they allow the use of the closed-form solution of the unsaturated hydraulic conductivity in the Mualem-van Genuchten model; and (ii) they consider the effect of macroporosity. We determined that the hydraulic conductivity measured close to saturation could not be estimated based on the available estimators; however, the hydraulic conductivity in the matrix domain was predicted with high accuracy.</description><subject>algorithms</subject><subject>Belgium</subject><subject>bulk density</subject><subject>data bases</subject><subject>data processing</subject><subject>Europe</subject><subject>Flanders</subject><subject>forest soils</subject><subject>Gardner model</subject><subject>hydraulic conductivity</subject><subject>mapping</subject><subject>mathematical models</subject><subject>mathematics and statistics</subject><subject>moisture</subject><subject>northern Belgium</subject><subject>optimization</subject><subject>pedotransfer functions</subject><subject>preferential flow</subject><subject>saturation</subject><subject>soil hydraulic properties</subject><subject>soil surveys</subject><subject>soils</subject><subject>surveys</subject><subject>uncertainty</subject><subject>unsaturated hydraulic conductivity</subject><subject>unsaturated zone</subject><subject>vadose zone</subject><subject>Vereecken Data Base</subject><subject>Vereecken database</subject><subject>Vereecken pedotransfer functions</subject><subject>Western Europe</subject><issn>1539-1663</issn><issn>1539-1663</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>24P</sourceid><sourceid>WIN</sourceid><recordid>eNp9kLtPwzAQhyMEEs-NnUwsEDjbiWOzoYryEAjEowOLZZxL5ZLaYCeg8teTKh2YGE53On2_0-lLkn0CJ5Qwfvr1M6MA4gSA07VkixRMZoRztv5n3ky2Y5wBEJnndCuZPOKXjba1bppOMCCad3TpA1a-DdrFGkM67pxprXfxLL12bfBVZ5a0TkeNj1hlYx_m6dWiCrprrEnvfIXNbrJR6ybi3qrvJM_ji-fRVXZ7f3k9Or_NdMEYzXLBdEmEFGUuJTImeE7fipySokSiqeRSI-V1UZUCauAFSMm5RkZMbiqQbCc5HM5-BP_ZYWzV3EaDTaMd-i4qCgVAmUMPHg-gCT7GgLX6CHauw0IRUEt3auVOLd31uBzwb9vg4l9WTV5v6LL6xSp7NGSn6KOx6Ax--9BUaua74HoZ_VcgFTDKJenpg4GutVd6GmxUL08UCAPCiRCCsl8Imoow</recordid><startdate>200902</startdate><enddate>200902</enddate><creator>Weynants, M</creator><creator>Vereecken, H</creator><creator>Javaux, M</creator><general>Soil Science Society of America</general><general>Soil Science Society</general><scope>FBQ</scope><scope>24P</scope><scope>WIN</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope></search><sort><creationdate>200902</creationdate><title>Revisiting Vereecken Pedotransfer Functions: Introducing a Closed-Form Hydraulic Model</title><author>Weynants, M ; Vereecken, H ; Javaux, M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a5332-483a718987499e338642b542157e1a2969ae26f5d780f06509966ae31c4cd093</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>algorithms</topic><topic>Belgium</topic><topic>bulk density</topic><topic>data bases</topic><topic>data processing</topic><topic>Europe</topic><topic>Flanders</topic><topic>forest soils</topic><topic>Gardner model</topic><topic>hydraulic conductivity</topic><topic>mapping</topic><topic>mathematical models</topic><topic>mathematics and statistics</topic><topic>moisture</topic><topic>northern Belgium</topic><topic>optimization</topic><topic>pedotransfer functions</topic><topic>preferential flow</topic><topic>saturation</topic><topic>soil hydraulic properties</topic><topic>soil surveys</topic><topic>soils</topic><topic>surveys</topic><topic>uncertainty</topic><topic>unsaturated hydraulic conductivity</topic><topic>unsaturated zone</topic><topic>vadose zone</topic><topic>Vereecken Data Base</topic><topic>Vereecken database</topic><topic>Vereecken pedotransfer functions</topic><topic>Western Europe</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Weynants, M</creatorcontrib><creatorcontrib>Vereecken, H</creatorcontrib><creatorcontrib>Javaux, M</creatorcontrib><collection>AGRIS</collection><collection>Wiley Online Library (Open Access Collection)</collection><collection>Wiley Online Library (Open Access Collection)</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><jtitle>Vadose zone journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Weynants, M</au><au>Vereecken, H</au><au>Javaux, M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Revisiting Vereecken Pedotransfer Functions: Introducing a Closed-Form Hydraulic Model</atitle><jtitle>Vadose zone journal</jtitle><date>2009-02</date><risdate>2009</risdate><volume>8</volume><issue>1</issue><spage>86</spage><epage>95</epage><pages>86-95</pages><issn>1539-1663</issn><eissn>1539-1663</eissn><abstract>We revisited the Vereecken database, which has been used to derive pedotransfer functions (PTFs) to estimate the soil hydraulic parameters of Belgian soils. We developed new PTFs based on the Mualem-van Genuchten model, constraining m = 1 - 1/n and using fewer parameters. The goodness-of-fit was similar to the one originally obtained by Vereecken. We used a one-step procedure that allows direct quantification of the correlation matrix and the uncertainties of the estimated parameter values. The coefficients of the new PTFs were estimated using a global search algorithm and they were validated against independent data. The PTFs have a wider range of applicability since: (i) they allow the use of the closed-form solution of the unsaturated hydraulic conductivity in the Mualem-van Genuchten model; and (ii) they consider the effect of macroporosity. 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| source | Access via Wiley Online Library; EZB-FREE-00999 freely available EZB journals |
| subjects | algorithms Belgium bulk density data bases data processing Europe Flanders forest soils Gardner model hydraulic conductivity mapping mathematical models mathematics and statistics moisture northern Belgium optimization pedotransfer functions preferential flow saturation soil hydraulic properties soil surveys soils surveys uncertainty unsaturated hydraulic conductivity unsaturated zone vadose zone Vereecken Data Base Vereecken database Vereecken pedotransfer functions Western Europe |
| title | Revisiting Vereecken Pedotransfer Functions: Introducing a Closed-Form Hydraulic Model |
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