Description: Das Projekt "Soil moisture in mountainous terrain and its influence on the thermal regime in seasonal and permanently frozen terrain" wird vom Umweltbundesamt gefördert und von University of Fribourg, Geosciences Departement, Geography Unit durchgeführt. In many geoscientific problems, the water content of the near subsurface plays a major role not only regarding the energy and water budget of the soils and at the atmosphere-subsurface interface, but also regarding stability issues on sloping mountainous terrain. This includes the influence of water content on the thermal and hydraulic conductivity of frozen soil as well as the influence of latent heat during freeze and thaw processes. In spite of this importance, soil moisture is currently not measured operationally at middle or high altitudes, where a seasonally and perennially frozen subsurface (permafrost) prevails. The proposed project will close this gap regarding data availability and process understanding about the influence of spatially and temporally variable water content on the ground thermal regime in the context of freezing and thawing processes. Specifically, the project aims at: 1) setting up a network of soil moisture monitoring stations at middle and high altitudes in Switzerland 2) applying innovative geophysical approaches to determine the 2-dimensional distribution of liquid water and ice content 3) using the coupled heat and mass transfer subsurface model COUP to estimate the influence of temporally and spatially changing soil moisture on the thermal regime of partly and permanently frozen ground. The combination of a new, operationally maintained soil moisture network, novel geophysical approaches for analyzing the spatial variability and the transient subsurface simulations including all important energy and water fluxes will allow a detailed assessment of the influence of temporally varying water content on the future evolution of the subsurface thermal regime in the mountainous regions of Switzerland.
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Messstation ? Schweiz ? Bodeninformationssystem ? Latentwärme ? Temperaturabhängigkeit ? Feuchtigkeitsmessung ? Bodentemperatur ? Bodenwasser ? Wärme ? Wärmeleitfähigkeit ? Wasserbilanz ? Frost ? Geoinformation ? Unterboden ? Untergrund ? Bodenuntersuchung ? Daten ? Energie ? Energiebilanz ? Geophysik ? Jahreszeit ? Monitoring ? Simulation ? Simulationsmodell ? Wasserdurchlässigkeit ? Wassergehalt ? Bodenfeuchte ? Hochgebirge ? Mittelgebirge ? Stofftransportmodell ? Modellierung ? Bodenprozess ? Permafrost ? Geowissenschaften ? Stofftransport ? Wasserhaushalt ? Gebirge ? freeze and thaw processes ? numerical modelling ? Wärmefluss ? Wärmemodell ? Massentransportmodell ? Zeitverlauf ? Untergrund [Boden] ? seasonal frost ? geophysical methods ?
License: cc-by-nc-nd/4.0
Language: Englisch/English
Time ranges: 2013-03-01 - 2016-02-29
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