Brief communication: Mountain permafrost acts as an aquitard during an infiltration experiment monitored with electrical resistivity tomography time-lapse measurements

Abstract. Frozen layers within the subsurface of rock glaciers are generally assumed to act as aquicludes or aquitards. So far, this behavior has been mainly defined by analyzing geochemical characteristics spring waters. In work, for first time, we experimentally confirmed assumption executing an infiltration test in a glacier Southern Alps, Italy. Time-lapse electrical resistivity tomography (ERT) technique monitored 800 L saltwater released on surface glacier; 24 h ERT monitoring highlighted that injected water was not able infiltrate into underlying frozen layer.