Tree hydrodynamic modelling of the soil–plant–atmosphere continuum using FETCH3
<p>Modelling the water transport along the soil–plant–atmosphere continuum is fundamental to estimating and predicting transpiration fluxes. A Finite-difference Ecosystem-scale Tree Crown Hydrodynamics model (FETCH3) for the water fluxes across the soil–plant–atmosphere continuum is presented...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-03-01
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| Series: | Geoscientific Model Development |
| Online Access: | https://gmd.copernicus.org/articles/15/2619/2022/gmd-15-2619-2022.pdf |
| _version_ | 1818285667023585280 |
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| author | M. Silva A. M. Matheny V. R. N. Pauwels D. Triadis D. Triadis J. E. Missik G. Bohrer E. Daly |
| author_facet | M. Silva A. M. Matheny V. R. N. Pauwels D. Triadis D. Triadis J. E. Missik G. Bohrer E. Daly |
| author_sort | M. Silva |
| collection | DOAJ |
| description | <p>Modelling the water transport along the soil–plant–atmosphere continuum is fundamental to estimating and predicting transpiration fluxes. A Finite-difference Ecosystem-scale Tree Crown Hydrodynamics model (FETCH3) for the water fluxes across the soil–plant–atmosphere continuum is presented here. The model combines the water transport pathways into one vertical dimension, and assumes that the water flow through the soil, roots, and above-ground xylem can be approximated as flow in porous media. This results in a system of three partial differential equations, resembling the Richardson–Richards equation, describing the transport of water through the plant system and with additional terms representing sinks and sources for the transfer of water from the soil to the roots and from the leaves to the atmosphere. The numerical scheme, developed in Python 3, was tested against exact analytical solutions for steady state and transient conditions using simplified but realistic model parameterizations. The model was also used to simulate a previously published case study, where observed transpiration rates were available, to evaluate model performance. With the same model setup as the published case study, FETCH3 results were in agreement with observations. Through a rigorous coupling of soil, root xylem, and stem xylem, FETCH3 can account for variable water capacitance, while conserving mass and the continuity of the water potential between these three layers. FETCH3 provides a ready-to-use open access numerical model for the simulation of water fluxes across the soil–plant–atmosphere continuum.</p> |
| first_indexed | 2024-12-13T01:12:20Z |
| format | Article |
| id | doaj.art-1be61a2cf5284b418608662e4a6cb105 |
| institution | Directory Open Access Journal |
| issn | 1991-959X 1991-9603 |
| language | English |
| last_indexed | 2024-12-13T01:12:20Z |
| publishDate | 2022-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Geoscientific Model Development |
| spelling | doaj.art-1be61a2cf5284b418608662e4a6cb1052022-12-22T00:04:25ZengCopernicus PublicationsGeoscientific Model Development1991-959X1991-96032022-03-01152619263410.5194/gmd-15-2619-2022Tree hydrodynamic modelling of the soil–plant–atmosphere continuum using FETCH3M. Silva0A. M. Matheny1V. R. N. Pauwels2D. Triadis3D. Triadis4J. E. Missik5G. Bohrer6E. Daly7Department of Civil Engineering, Monash University, Clayton, VIC, AustraliaDepartment of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, USADepartment of Civil Engineering, Monash University, Clayton, VIC, AustraliaDepartment of Mathematics and Statistics, La Trobe University, Bundoora, VIC, AustraliaInstitute of Mathematics for Industry, Kyushu University, Fukuoka, JapanDepartment of Civil, Environmental and Geodetic Engineering, Ohio State University, Columbus, OH, USADepartment of Civil, Environmental and Geodetic Engineering, Ohio State University, Columbus, OH, USADepartment of Civil Engineering, Monash University, Clayton, VIC, Australia<p>Modelling the water transport along the soil–plant–atmosphere continuum is fundamental to estimating and predicting transpiration fluxes. A Finite-difference Ecosystem-scale Tree Crown Hydrodynamics model (FETCH3) for the water fluxes across the soil–plant–atmosphere continuum is presented here. The model combines the water transport pathways into one vertical dimension, and assumes that the water flow through the soil, roots, and above-ground xylem can be approximated as flow in porous media. This results in a system of three partial differential equations, resembling the Richardson–Richards equation, describing the transport of water through the plant system and with additional terms representing sinks and sources for the transfer of water from the soil to the roots and from the leaves to the atmosphere. The numerical scheme, developed in Python 3, was tested against exact analytical solutions for steady state and transient conditions using simplified but realistic model parameterizations. The model was also used to simulate a previously published case study, where observed transpiration rates were available, to evaluate model performance. With the same model setup as the published case study, FETCH3 results were in agreement with observations. Through a rigorous coupling of soil, root xylem, and stem xylem, FETCH3 can account for variable water capacitance, while conserving mass and the continuity of the water potential between these three layers. FETCH3 provides a ready-to-use open access numerical model for the simulation of water fluxes across the soil–plant–atmosphere continuum.</p>https://gmd.copernicus.org/articles/15/2619/2022/gmd-15-2619-2022.pdf |
| spellingShingle | M. Silva A. M. Matheny V. R. N. Pauwels D. Triadis D. Triadis J. E. Missik G. Bohrer E. Daly Tree hydrodynamic modelling of the soil–plant–atmosphere continuum using FETCH3 Geoscientific Model Development |
| title | Tree hydrodynamic modelling of the soil–plant–atmosphere continuum using FETCH3 |
| title_full | Tree hydrodynamic modelling of the soil–plant–atmosphere continuum using FETCH3 |
| title_fullStr | Tree hydrodynamic modelling of the soil–plant–atmosphere continuum using FETCH3 |
| title_full_unstemmed | Tree hydrodynamic modelling of the soil–plant–atmosphere continuum using FETCH3 |
| title_short | Tree hydrodynamic modelling of the soil–plant–atmosphere continuum using FETCH3 |
| title_sort | tree hydrodynamic modelling of the soil plant atmosphere continuum using fetch3 |
| url | https://gmd.copernicus.org/articles/15/2619/2022/gmd-15-2619-2022.pdf |
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