Improved calculation of soil hydraulic conductivity with the simplified evaporation method
Abstract Numerical modeling of soil water dynamics and storage is generally based on the Richards equation. Its solution requires knowledge of the soil hydraulic properties (SHP): the soil water retention function and the hydraulic conductivity function. To determine SHP, laboratory evaporation expe...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-09-01
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| Series: | Vadose Zone Journal |
| Online Access: | https://doi.org/10.1002/vzj2.20267 |
| _version_ | 1827820474911948800 |
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| author | Leonardo Inforsato Sascha Iden Wolfgang Durner Andre Peters Quirijn De Jong van Lier |
| author_facet | Leonardo Inforsato Sascha Iden Wolfgang Durner Andre Peters Quirijn De Jong van Lier |
| author_sort | Leonardo Inforsato |
| collection | DOAJ |
| description | Abstract Numerical modeling of soil water dynamics and storage is generally based on the Richards equation. Its solution requires knowledge of the soil hydraulic properties (SHP): the soil water retention function and the hydraulic conductivity function. To determine SHP, laboratory evaporation experiments are particularly popular because they provide data for both SHP functions. The evaluation by the simplified evaporation method (SEM) method, originally proposed by Schindler and subsequently improved by several authors, relies on linearization assumptions that allow for a relatively simple calculation scheme but result in biased conductivity data for some soils. The objective of this study is to propose and test an improved computational scheme for the hydraulic conductivity function. We present the new theory and show that it leads generally to higher accuracy of the conductivity function. The improvement is most pronounced for sandy soils and soil water pressure heads below −100 cm, where the original method provided data with bias. |
| first_indexed | 2024-03-12T01:28:23Z |
| format | Article |
| id | doaj.art-71f8a8b41fdd49e9915e3001c744e693 |
| institution | Directory Open Access Journal |
| issn | 1539-1663 |
| language | English |
| last_indexed | 2024-03-12T01:28:23Z |
| publishDate | 2023-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Vadose Zone Journal |
| spelling | doaj.art-71f8a8b41fdd49e9915e3001c744e6932023-09-12T09:49:24ZengWileyVadose Zone Journal1539-16632023-09-01225n/an/a10.1002/vzj2.20267Improved calculation of soil hydraulic conductivity with the simplified evaporation methodLeonardo Inforsato0Sascha Iden1Wolfgang Durner2Andre Peters3Quirijn De Jong van Lier4Centre for Nuclear Energy in Agriculture (CENA/USP) University of São Paulo PiracicabaBrazilDivision of Soil Science and Soil Physics Technische Universität Braunschweig BraunschweigGermanyDivision of Soil Science and Soil Physics Technische Universität Braunschweig BraunschweigGermanyDivision of Soil Science and Soil Physics Technische Universität Braunschweig BraunschweigGermanyCentre for Nuclear Energy in Agriculture (CENA/USP) University of São Paulo PiracicabaBrazilAbstract Numerical modeling of soil water dynamics and storage is generally based on the Richards equation. Its solution requires knowledge of the soil hydraulic properties (SHP): the soil water retention function and the hydraulic conductivity function. To determine SHP, laboratory evaporation experiments are particularly popular because they provide data for both SHP functions. The evaluation by the simplified evaporation method (SEM) method, originally proposed by Schindler and subsequently improved by several authors, relies on linearization assumptions that allow for a relatively simple calculation scheme but result in biased conductivity data for some soils. The objective of this study is to propose and test an improved computational scheme for the hydraulic conductivity function. We present the new theory and show that it leads generally to higher accuracy of the conductivity function. The improvement is most pronounced for sandy soils and soil water pressure heads below −100 cm, where the original method provided data with bias.https://doi.org/10.1002/vzj2.20267 |
| spellingShingle | Leonardo Inforsato Sascha Iden Wolfgang Durner Andre Peters Quirijn De Jong van Lier Improved calculation of soil hydraulic conductivity with the simplified evaporation method Vadose Zone Journal |
| title | Improved calculation of soil hydraulic conductivity with the simplified evaporation method |
| title_full | Improved calculation of soil hydraulic conductivity with the simplified evaporation method |
| title_fullStr | Improved calculation of soil hydraulic conductivity with the simplified evaporation method |
| title_full_unstemmed | Improved calculation of soil hydraulic conductivity with the simplified evaporation method |
| title_short | Improved calculation of soil hydraulic conductivity with the simplified evaporation method |
| title_sort | improved calculation of soil hydraulic conductivity with the simplified evaporation method |
| url | https://doi.org/10.1002/vzj2.20267 |
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