Abstract

Urban drainage networks are under constant pressure caused by a permanently changing environment. For proactive planning, management, and adaptation of urban water infrastructure, a robust and comprehensive knowledge base is needed as decision support. This paper shows an integrated approach for decision support consisting of urban development modeling, climate projections, hydrodynamic sewer modeling, and Web-GIS visualization of interactive risk maps for pluvial flooding. The application on an Alpine case study demonstrates the benefits of such a combined consideration of different drivers. Climate projections of precipitation are based on four climate projections produced specifically for the Alps on a 0.1° grid. In order to obtain precipitation data with an adequate resolution for urban drainage modeling, the projections are downscaled using a statistical downscaling method. The results indicate a trend toward more intense heavy precipitation during summer until 2050. The effect of this trend can either be compensated or amplified by city development. It is shown that population growth on its own does not necessarily lead to a decrease of system performance, but that clever spatial planning can reduce negative effects. The visualization helps to involve stakeholders, politicians, and the public by illustrating model results for strategic planning and in workshops.

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Acknowledgments

This work was funded by the Austrian Climate and Energy Fund in the Austrian Climate Research Program (Project No. KR16AC0K13143).

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Go to Journal of Water Resources Planning and Management
Journal of Water Resources Planning and Management
Volume 143Issue 12December 2017

History

Received: Dec 30, 2016
Accepted: May 12, 2017
Published online: Sep 25, 2017
Published in print: Dec 1, 2017
Discussion open until: Feb 25, 2018

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Christian Mikovits, Ph.D.
Postdoctoral Researcher, Unit for Environmental Engineering, Univ. of Innsbruck, Technikerstrasse 13, 6020 Innsbruck, Austria.
Franz Tscheikner-Gratl, Ph.D.
Postdoctoral Researcher, Unit for Environmental Engineering, Univ. of Innsbruck, Technikerstrasse 13, 6020 Innsbruck, Austria.
Alrun Jasper-Tönnies
Researcher, Hydro&meteo GmbH&Co.KG, Breite Strasse 6–8, 23552 Lübeck, Germany.
Thomas Einfalt, Ph.D.
Director, Hydro&meteo GmbH&Co.KG, Breite Strasse 6–8, 23552 Lübeck, Germany.
Matthias Huttenlau, Ph.D.
Postdoctoral Researcher, Centre for Climate Change Adaptation, alpS GmbH, Grabenweg 68, 6020 Innsbruck, Austria.
Martin Schöpf
Lead Programmer, Hydro-IT GmbH, Technikerstrasse 13, 6020 Innsbruck, Austria.
Heiko Kinzel
Director, Hydro-IT GmbH, Technikerstrasse 13, 6020 Innsbruck, Austria.
Wolfgang Rauch, Ph.D.
Professor, Unit for Environmental Engineering, Univ. of Innsbruck, Technikerstrasse 13, 6020 Innsbruck, Austria.
Professor, Unit for Environmental Engineering, Univ. of Innsbruck, Technikerstrasse 13, 6020 Innsbruck, Austria (corresponding author). ORCID: https://orcid.org/0000-0002-4001-1711. E-mail: [email protected]

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