SMART WATER

Le CREALP a apporté son expertise lors de la 2ème édition de la conférence Smart Water, les 15 et 16 octobre 2020 au Châble. Le but de cet événement, organisé par le Pôle d’Innovation BlueArk Entremont, a été de mettre en lumière et partager les bonnes pratiques pour une utilisation raisonnée et raisonnable de l’eau. Tristan Brauchli a apporté un éclairage sur les impacts passés et futurs du changement climatique sur les… Read More

Low-flow behavior of alpine catchments with varying quaternary cover under current and future climatic conditions

Arnoux, M., Brunner, P., Schaefli, B., Mott, R., Cochand, F., & Hunkeler, D. (2021). Low-flow behavior of alpine catchments with varying quaternary cover under current and future climatic conditions. Journal of Hydrology, 592, 125591. https://doi.org/10.1016/j.jhydrol.2020.125591 Alpine environments are particularly vulnerable to climatic warming, and long term observations suggest a shiftof snow-influenced river discharge towards earlier periods of the year. For water resources management, theseasonal patterns of discharge in alpine areas are particularly relevant, as the… Read More

HYDRO-CH2018

En octobre 2020, le CREALP a activement participé à la conférence Hydro-CH2018. Cette conférence présentait les résultats des différents projets ayant pour objectif d’améliorer la compréhension des processus hydrologiques concernant les impacts des changements climatiques sur les ressources en eau de la Suisse. Marie Arnoux a présenté les résultats sur les dynamiques et le stockage des eaux souterraines dans les bassins versants alpins. Vous trouverez plus d’informations sur ce projet ici :www.nccs.admin.ch/nccs/fr/home/le-nccs/themes-prioritaires/cycle-hydrologique/projets-de-recherche-hydro-ch2018.html

Glacier Lake 513, Peru : Lessons for early warning service development

Huggel, C., Cochachin, A., Drenkhan, F., Fluixá-Sanmartín, J., Frey, H., García Hernández, J., Jurt, C., Muñoz, R., Price, K., & Vicuña, L. (2020). Glacier Lake 513, Peru : Lessons for early warning service development. WMO Bulletin, 69(1), 45‑52. Glacier shrinkage – accelerated over the last decades due to climate change – is exposing large areas in mountain regions worldwide. But an even dire consequence of the melting ice is the forming of more glacier lakes, which are… Read More

Remote thermal detection of exfoliation sheet deformation.

Guerin, A., Jaboyedoff, M., Collins, B. D., Stock, G. M., Derron, M.-H., Abellán, A., & Matasci, B. (2020). Remote thermal detection of exfoliation sheet deformation. Landslides. https://doi.org/10.1007/s10346-020-01524-1 A growing body of research indicates that rock slope failures, particularly from exfoliating cliffs, are promoted by rock deformations induced by daily temperature cycles. Although previous research has described how these deformations occur, full three-dimensional monitoring of both the deformations and the associated temperature changes has not yet… Read More

Géothermoval II. Potentiel géothermique des conduits à perméabilité élevée à la base de la vallée du Rhône

Sonney, R., Ornstein, P., Mage, R., & Sartori, M. (2020). Géothermoval II. Potentiel géothermique des conduits à perméabilité élevée à la base de la vallée du Rhône. 6, 7. Le Valais est le canton suisse ayant la plus forte densité de résurgences hydrothermales naturelles en surface (N = 10). Cette densité pourrait être encore plus importante si l’on tient compte des remontées hydrothermales sises à la base du remplissage quaternaire de la vallée du Rhône… Read More

Characterizing seasonal groundwater storage in alpine catchments using time‐lapse gravimetry, water stable isotopes and water balance methods

Arnoux, M., Halloran, L. J. S., Berdat, E., & Hunkeler, D. (2020). Characterizing seasonal groundwater storage in alpine catchments using time‐lapse gravimetry, water stable isotopes and water balance methods. Hydrological Processes, 34(22), 4319‑4333. https://doi.org/10.1002/hyp.13884 Alpine areas play a major role in water supply in downstream valleys by releasing water during warm and dry periods. However, the hydrogeology of alpine catchments, which are particularly exposed to the effects of climate change, is currently not well understood…. Read More

Application of an Ensemble Kalman Filter to A Semi-distributed Hydrological Flood Forecasting System in Alpine Catchments

Foehn, A., Schwob, A., Pasetto, D., García Hernández, J., & De Cesare, G. (2020). Application of an Ensemble Kalman Filter to A Semi-distributed Hydrological Flood Forecasting System in Alpine Catchments. In P. Gourbesville & G. Caignaert (Éds.), Advances in Hydroinformatics (p. 319‑334). Springer. https://doi.org/10.1007/978-981-15-5436-0_24 One of the key success factors for hydrological forecasts is initial conditions that represent well the conditions of the simulated basin at the beginning of the forecast. Real-time Data Assimilation (DA) has… Read More

Comprehensive decision-making approach for managing time dependent dam risks

Fluixá-Sanmartín, J., Escuder-Bueno, I., Morales-Torres, A., & Castillo-Rodríguez, J. T. (2020). Comprehensive decision-making approach for managing time dependent dam risks. Reliability Engineering & System Safety, 203, 107100. https://doi.org/10.1016/j.ress.2020.107100 Dams are critical infrastructures whose safety must be properly managed. Traditional decision-making approaches often assume the stationarity of factors defining risk. However, dam risk is susceptible to evolve with time. Risk can no longer be considered a static but a time-dependent concept which cumulative value must be… Read More

Mission Possible, RTS

Lien : Mission Possible : La station de Grimentz (Episode 2/2 – Saison 2020) – Play RTS Tristan Brauchli a participé au magazine Mission Possible de la RTS pour expliquer quels sont les effets des changements climatiques sur le milieu alpin, en prenant comme exemple la région de Grimentz. Vous pouvez voir l’intervention de Tristan Brauchli à partir de la minute 15:00 © RTS