Water and energy transfer modeling in a permafrost‐dominated, forested catchment of Central Siberia: the key role of rooting depth - Archive ouverte HAL Access content directly
Journal Articles Permafrost and Periglacial Processes Year : 2019

Water and energy transfer modeling in a permafrost‐dominated, forested catchment of Central Siberia: the key role of rooting depth

Abstract

In order to quantify the impact of evapotranspiration phenomena on active layer dynamics in a permafrost-dominated forested watershed in Central Siberia, we performed a numerical cryohydrological study of water and energy transfer using a new open source cryohydrogeology simulator, with two innovative features: the spatially distributed, mechanistic handling of evapotranspiration and the inclusion of the developed numerical tool in the high performance computing tool box for numerical simulation of fluid dynamics OpenFOAM®. In this region, the heterogeneity of solar exposure leads to strong contrasts in vegetation cover, which constitute the main source of variability of hydrological conditions at the landscape scale. The uncalibrated numerical results reasonably reproduce the measured soil temperature profiles and the dynamics of infiltrated waters revealed by previous biogeochemical studies. The impacts of the thermo-hydrological processes on the water fluxes from the soils to the stream are discussed through comparison between numerical results and field data. The impact of evapotranspiration on water fluxes is studied numerically, which highlights a strong sensitivity to the variability of rooting depth and corresponding evapotranspiration at the slopes of different aspects in the catchment.
Fichier principal
Vignette du fichier
Orgogozo_25710.pdf (1.39 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-02538303 , version 1 (09-04-2020)

Identifiers

Cite

Laurent Orgogozo, Anatoly S. Prokushkin, Oleg S. Pokrovsky, Christophe Grenier, Michel Quintard, et al.. Water and energy transfer modeling in a permafrost‐dominated, forested catchment of Central Siberia: the key role of rooting depth. Permafrost and Periglacial Processes, 2019, 30 (2), pp.75-89. ⟨10.1002/ppp.1995⟩. ⟨hal-02538303⟩
552 View
180 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More