Robenhauser Ried

Robenhausen is a locality in Wetzikon, one of the municipalities of the canton of Zürich, Switzerland. The wetland Robenhauser Ried belongs to the protected area surrounding Pfäffikersee. The prehistoric pile dwelling around Lake Zurich Wetzikon-Robenhausen is part of the UNESCO-defined World Heritage Sites, the prehistoric pile dwellings around the Alps.

Robenhausen is located in the Hinwil District in the Zürcher Oberland at the southeastern lake shore of Pfäffikersee. The so-called Robenhauser Ried (Swiss German: Robenhusener Riet) is a protected reed landscape. The Aabach stream drains the Robenhauser Ried wetlands and the lake, and it flows into the Ustermer Aa.

The bus line operator Verkehrsbetriebe Zürichsee und Oberland (VZO) provides the local bus transport in Wetzikon for the regions of the Oberland and the upper northeastern shore of Lake Zurich.

The Pfäffikersee reed and marsh belt at Robenhausen has a width of about 1 kilometre (1 mi). From the beginning of the 18th century until about 1950 there peat was cut. The wetland is a nature reserve of national importance and is situated between Seegräben, Kempten and Irgenhausen covering an area of about 2 square kilometres (1 sq mi). In 1873 a shooting range was established in Robenhausen; the building has been used as a boathouse for decades, but the contaminants in the soil exceeded the limit values and a "significant risk" for groundwater, thus in July 2013 a 300 metres (984 ft) and 400 metres (1,312 ft) area had to be decontaminated with a cost totaling to about 255,000 Swiss Francs.

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