Sihl Valley (
The area alongside
Upper Sihl Valley
Sihl rises at Drusberg near
Lower Sihl Valley
Now it enters the canton of Zurich, nearby
The break of the concrete dam of the Sihlsee could lead, according to studies, to an 8 m (26 ft) high flood wave reaching the city of Zürich, the biggest city in Switzerland, within 1.5 hours (Leimbach), its inner city (2 hours) and Zürich-Altstetten within 3 hours.
Flora and fauna
As part of a floristic mapping, the territory of the Sihl Valley between the city of Zürich and Höhronen was mapped by the Institute for the conservation of the Canton of Zürich on an area of 249 km2. The so-called report "Flora des Sihltals von der Stadt Zürich bis zum Höhronen" includes 2109 species, including 611 frequent crops and ornamental plants or accidentally introduced species which grow wild at most locally and in the short term. 1498 species are, or were at least 30 years during the last 160 years in stable populations exist. Of which 177 or 13% are now extinct, and 284 have been re-introduced and introduced. In all, the flora has become more species-ric, however, 42% of the previous species have decreased and only 30% show an increasing trend.
Sihltal is a well-known recreation area and popular for
The term "Region
The lower Sihl valley has an excellent local transportation network:
- Wildnispark Zürich: Sihlwald
- "Stadt Zürich: Wasseralarm Sihlsee" (PDF). (387 KB)
- Elias Landolt (2013-03-01). "Flora des Sihltals von der Stadt Zürich bis zum Höhronen" (PDF) (in German). Fachstelle Naturschutz Kanton Zürich. Retrieved 2015-06-16.
- Region Zimmerberg-Sihltal (in German)