دورية أكاديمية
A Dual-Permeability Approach for Modeling Soil Water Flow and Heat Transport during Freezing and Thawing
| العنوان: | A Dual-Permeability Approach for Modeling Soil Water Flow and Heat Transport during Freezing and Thawing |
|---|---|
| المؤلفون: | Mats Larsbo, Roger Holten, Marianne Stenrød, Ole Martin Eklo, Nicholas Jarvis |
| المصدر: | Vadose Zone Journal, Vol 18, Iss 1 (2019) |
| بيانات النشر: | Wiley, 2019. |
| سنة النشر: | 2019 |
| المجموعة: | LCC:Environmental sciences LCC:Geology |
| مصطلحات موضوعية: | Environmental sciences, GE1-350, Geology, QE1-996.5 |
| الوصف: | Preferential flow may become significant in partially frozen soils because infiltration can occur through large, initially air-filled pores surrounded by a soil matrix with limited infiltration capacity. The objectives of this study were to develop and evaluate a dual-permeability approach for simulating water flow and heat transport in macroporous soils undergoing freezing and thawing. This was achieved by introducing physically based equations for soil freezing and thawing into the dual-permeability model MACRO. Richards’ equation and the heat flow equation were loosely coupled using the generalized Clapeyron equation for the soil micropore domain. Freezing and thawing of macropore water is governed by a first-order equation for energy transfer between the micropore and macropore domains. We assumed that macropore water was unaffected by capillary forces, so that water in macropores freezes at 0°C. The performance of the model was evaluated for four test cases: (i) redistribution of water in the micropore domain during freezing, (ii) a comparison between the first-order energy transfer approach and the heat conduction equation, (iii) infiltration and water flow in frozen soil with an initially air-filled macropore domain, and (iv) thawing from the soil surface during constant-rate rainfall. Results show that the model behaves in accordance with the current understanding of water flow and heat transport in frozen macroporous soil. To improve modeling of water and heat flow in frozen soils, attention should now be focused on providing experimental data suitable for evaluating models that account for macropore flow. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1539-1663 27340155 |
| Relation: | https://dl.sciencesocieties.org/publications/vzj/articles/18/1/190012; https://doaj.org/toc/1539-1663 |
| DOI: | 10.2136/vzj2019.01.0012 |
| URL الوصول: | https://doaj.org/article/5121481dcdfb4aee8c0f64ec27340155 |
| رقم الأكسشن: | edsdoj.5121481dcdfb4aee8c0f64ec27340155 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 15391663 27340155 |
|---|---|
| DOI: | 10.2136/vzj2019.01.0012 |