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Le precipitazioni di dicembre e gennaio hanno messo in movimento il bosco protettivo della Gürbetal, fra Berna e Thun. Nei territori comunali di Wattenwil e Blumenstein, in un'area di circa 60 ettari, il terreno si è mosso anche di una quindicina di metri.
La zona dello scoscendimento
Alberi possono cadere in qualsiasi momento e le opere di canalizzazione del fiume sono state intaccate su una lunghezza di 800 metri. I danni vengono stimati a 9-12 milioni di franchi, hanno reso noto le autorità in un comunicato diffuso venerdì.
Danni lungo il corso del fiume
Già in passato, ricorda un geologo citato sulla pagina internet di Wattenwil, la zona sotto il Gurnigel è stata soggetta a scoscendimenti, ma in questo caso l'ampiezza del fenomeno è superiore: 5 milioni di metri cubi su un fronte di 500 metri.
Possono cadere alberi
La situazione verrà tenuta sotto sorveglianza, ma già si sono adottate le prime misure preventive: i sentieri sono stati chiusi e si invita a non mettere piede nella zona a rischio. Non sussistono pericoli per l'abitato delle due località.
pon/ATS
Leggi il nostro approfondimento:
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