RECONECT Inn River Basin

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Created at: 29 Jan 2019

Description

Description of the Demonstrator

The case study deals with the urban/torrential catchment interaction in alpine environments. NBS are installed in torrents since the 1950ies allowing to test the effects post-ex. Measurements at plot and catchment scale support modelling and generalization to assess other catchments.

The overall planned case study includes various sub-catchment configurations located in the Tyrol, primarily along and in the tributaries of the River Inn valley. The catchment Geroldsbach- Götzens is used as a lead catchment, being typical for numerous similar urban/rural configuration. All installations regarding monitoring and process assessment are transferred to all other investigated catchments on a modelling basis.

Context Environmental and Geographic context, climate conditions and problem description concerning hydro-meterological risks.

The catchment is located near Innsbruck, Austria, in south-west direction. The overall catchment comprises of the torrential catchments Geroldsbach (12 km2) and Marbach (1.2 km2) with two urban catchment parts (Götzens and Neu-Götzens) located in the downstream part. Neu-Götzens is part of the municipality of Götzens with partly industrial and partly new settlement area. Until now the population has grown up to 4.062 (2018). Runoffs interact with the receiving water of both torrent watersheds.

The torrential catchment Geroldsbach is located above Götzens (~868 m.a.s.l.). Its river spring is at an elevation of ~1920 m.a.s.l. near the mountain Birgitzköpfl and is enclosed at the top by the mountain peaks Nockspitze (Saile; ~2404 m.a.s.l.) and Birgitzköpfl (~1982 m.a.s.l.). Total length of the torrent main channel is 8 km, whereas after 9.4 km the Geroldsbach joins the river Inn. Along its pathway the river merges with several small side rivers and tributaries, like Gehrbach, Grosser Blaikenbach, Tödersbach, Kirchbach, Horachbach and Marchbach and some other (nameless) tributaries.

The torrential catchment, investigated faces as typical for such type of catchments, convective precipitation events leading to high discharges associated with sediment transport. Downstream of the torrential part, the interactions with the urban sub-catchments are the case. Flooding as well as confluence situations are result in critical situations and are subject of the investigation.


Samenvatting (Dutch description)

RECONECT Inn River Basin

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About the author

Floris Boogaard

• Submitted 2063 projects
• Expert at Water
• Netherlands

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