Double-peaked breakthrough curves as a consequence of solute transport through underground lakes: a case study of the Furfooz karst system, Belgium ; Curvas de avance de doble pico como consecuencia del transporte de soluto a través de lagos subterráneos: un estudio de caso del sistema de karst Furfooz, Bélgica ; Courbes de restitution à double pics comme conséquence du transport de soluté à travers des lacs souterrains: le cas d’étude du système karstique de Furfooz, Belgique ; Curvas de identificação de pico duplo como consequência do transporte de soluto através de lagoas subterrâneas: um estudo de caso do sistema cárstico de Furfooz, Bélgica

International audience ; The existence of double-peaked breakthrough curves (BTC), which are the result of the transport of a dye tracer through underground lakes, is reported. Investigations were undertaken on the Furfooz karst sys- tem in southern Belgium. In this system, the River Lesse sinks partially into a swallow hole. The water follows a solitary conduit leading to an underground lake that is directly connected to a second underground lake. Double-peaked BTCs were detected in the resurgent wa- ter, downstream of this second lake. The report first de- scribes field data (tracer tests in... Mehr ...