| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m16b.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | x6e6X3pFwXQZ3DUS8rS5/z4pJL |
| Repository | cptec.inpe.br/walmeida/2003/08.05.14.06 (restricted access) |
| Last Update | 2005:04.06.03.00.00 (UTC) administrator |
| Metadata Repository | cptec.inpe.br/walmeida/2003/08.05.14.06.19 |
| Metadata Last Update | 2021:02.10.18.59.19 (UTC) administrator |
| Secondary Key | INPE-9951-PRE/5511 |
| ISSN | 0361-5995 |
| Citation Key | TomasellaPachCresRawl:2003:CoTwTe |
| Title | Comparison of two techniques to develop pedotransfer functions for water retention  |
| Year | 2003 |
| Month | Jul-Aug |
| Access Date | 2024, May 16 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 89 KiB |
| 2. Context | |
| Author | 1 Tomasella, Javier 2 Pachepsky, Ya 3 Crestana, S. 4 Rawls, W. J. |
| Resume Identifier | 1 8JMKD3MGP5W/3C9JHE3 |
| Group | 1 DMD-INPE-MCT-BR |
| Affiliation | 1 Centro de Previsao de Tempo e Estudos Climaticos - CPTEC/INPE 2 USDA-ARS Animal Waste Pathogen Lab., Beltsville, important if water retention data are coming from vari- MD, USA 3 USDA-ARS Hydrology and Remote Sensing Lab., Beltsville, MD, USA. |
| e-Mail Address | valdire@cptec.inpe.br |
| Journal | Soil Science Society of America Journal |
| Volume | 67 |
| Pages | 1085-1092 |
| History (UTC) | 2005-04-06 12:08:02 :: Valdirene -> administrator :: 2008-06-10 19:49:36 :: administrator -> estagiario :: 2010-05-11 16:52:45 :: estagiario -> marciana :: 2010-05-18 13:42:40 :: marciana -> administrator :: 2021-02-10 18:59:19 :: administrator -> marciana :: 2003 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Keywords | soil water retention |
| Abstract | Two pedotransfer function (PTF) approaches can be used for obtaining the analytical expression of the whole retention curve: (i) soil basic data is used to estimate soil water retention at specific water potentials; and then an analytical expression of the retention curve is fitted to the estimated soil moisture values; and (ii) soil basic data is used for estimating the parameters of an analytical expression of water retention curves. The objective of this study was to compare the performance of both techniques using data representing the main Brazilian soils. First, we derived PTFs for the parameters of van Genuchten equation and for water contents at -6, -10, -33, -100, and -1500 kPa for the same development data set. Second, we compared the performance of both techniques for the same validation data set. The approach, based on the estimation of water contents at specific water potentials, provided better results: for the validation data set, this technique showed an average root mean squared error of 0.036 m 3 m -3 , compared with an averaged error of 0.098 m 3 m -3 of the technique based on the direct estimation of van Genuchten parameters. A possible explanation for this result might be related to the fact that soil moisture is controlled by different independent variables at different ranges of soil water potential, and those differences are not directly related to the van Genuchten parameters. |
| Area | MET |
| Arrangement | Comparison of two... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| Language | en |
| Target File | Tomasella_Comparison of two techniques to develop .pdf |
| User Group | administrator marciana |
| Visibility | shown |
| Copy Holder | SID/SCD |
| Archiving Policy | denypublisher denyfinaldraft |
| Read Permission | deny from all and allow from 150.163 |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/43SKC35 |
| Dissemination | WEBSCI |
| Host Collection | cptec.inpe.br/walmeida/2003/04.25.17.12 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyright creatorhistory descriptionlevel documentstage doi electronicmailaddress format isbn label lineage mark mirrorrepository nextedition notes number orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup rightsholder schedulinginformation secondarydate secondarymark session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url versiontype |
| 7. Description control | |
| e-Mail (login) | marciana |
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