The dried-up riverbed of the Töss. (Photo: Gottardo Pestalozzi / WSL)
The dried-up riverbed of the Töss. (Photo: Gottardo Pestalozzi / WSL) More droughts in summer and autumn - combined, paradoxically, with an increased risk of flooding - and, in the long term, less snow in winter. Climate change is altering the Earth's water balance. Switzerland has got drier. According to an SLF study, the duration of drought periods has decreased in recent decades, but their intensity has increased - throughout the Alpine region. A long-term comparison also shows that, between 1994 and 2017, a lack of snow was responsible for low water levels in Swiss watercourses around 15% more often than between 1970 and 1993. If there is little snow in winter and low precipitation the following summer as well, there is a real risk of drought during the summer.
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