The RISA-Project – Rain InfraStructure Adaption

The project was funded by the State Ministry of Urban Development and Environment of Hamburg (Behörde für Stadtentwicklung und Umwelt) in co-operation with HAMBURG WASSER, the municipal Water Supply and Wastewater Disposal Company in Hamburg in September 2009. Due to a restructuring of the authorities in July 2015 now the Ministry of Environment and Energy (Behörde für Umwelt und Energie) in co-operation with HAMBURG WASSER is responsible for the implementation of the RISA project.

The project RISA aims at developing adequate responses concerning rainwater management in order to avoid flooding of basements, streets and properties as well as water pollution from combined sewer overflow and urban / street run-off. The project focuses on the identification of technological requirements and the creation of conditions that enable a forward-looking and sustainable rainwater management. The main objective is to maintain the actual drainage comfort and to guarantee/improve water protection and inland flood protection. Moreover, the project seeks to integrate water management measures into urban and regional planning and to adapt the institutional setting accordingly.

Project results will support the development of a „Structural Plan Rainwater“, a guidance document for administrations, experts and property owners for new rainwater management in Hamburg. Therewith, the project RISA contributes to the climate protection concept and climate change adaptation strategy of the senate of Hamburg. The measure addresses the fact that rainwater management is a municipal joint task.

Phase I (2010): Joint problem and status quo analysis;
Phase II (2011): Evaluation and Planning;
Phase III (2012): Establishment of pilot projects, recommendations for changes / adaptations in regulations or new regulations etc. and structural plan developed;
In the ideal case (post-2013, after the project ends): structural plan will be adopted and legally implemented.

Goals

  • Flood protection & inland flood control
  • Water body conservation
  • Near-natural water balance

European Climate Change Adaptation Conference 2013

More than 700 participants attended the first European conference on climate adaptation research, which took place in Hamburg from 18 to 20 March 2013 under the theme "Integrating climate into action". The ECCA 2013 the first European conference, which dealt with a wide range of questions on climate adaptation. It includes content at the international conferences in Australia (Gold Coast, QLD 2010) and in the United States (Tucson, Arizona, 2012).

Dealing with climate change-induced destruction, strategies for the coasts, mountains and cities of Europe and the impact of climate change on the energy sector are some of the topics that were discussed in the main building of the University of Hamburg. 

More at  www.eccaconf.eu

Publication

Multifunctional Spaces for Flood Management – an Approach for the City of Hamburg, Germany (2012)
Released in: gwf Wasser I Abwasser, DIV Deutscher Industrieverlag GmbH
(https://www.di-verlag.de/de/GWF-Wasser-Abwasser)

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Publication

Publication: Rain InfraStructure Adaption (RISA) in the City of Hamburg and suitable funding for Stormwater Management, released in: Amsterdam International Water Week 2015, Conference paper.

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Publication

Publication: Water Sensitive Urban Design as a Role Model for Water Management in Germany? Lessons learned from Australia. Released in: bluefacts 2013, wvgw Wirtschafts- und Verlagsgesellschaft, 53123 Bonn, Germany, page 84 – 90, 2013.

“Water Sensitive Urban Design” (WSUD), originally developed in Australia, is a planning and design approach, combining the functionality of water management with principles of urban design. WSUD is mainly used when it comes to the development of integrated solutions for stormwater management in urban areas. Besides water management, WSUD regards urban design and socio-economic aspects, such as usability, functionality, aesthetics and public perception (Hoyer et al. 2011).

This article gives an overview about the (historic) background of WSUD in Australia and describes current developments and achievements, while emphasizing the main framework requirements and strategies to establish WSUD. Legal and statutory aspects, incentives and further education and communication strategies will be highlighted.

Finally, by comparing the Australian and German situation, the authors draw conclusions on the possibilities for applying Water Sensitive Urban Design in Germany. 

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Publication

Publication: Baseline assessment and best practices in urban water cycle services in the city of Hamburg. Released in: bluefacts 2013, wvgw Wirtschafts- und Verlagsgesellschaft, 53123 Bonn, Germany, page 10 – 16, 2013.

Megatrends (e.g. demographic changes, water scarcity, water pollution and climate change) pose urgent water challenges in cities. This is highlighted in the European Union (EU) project TRUST (Transitions to the Urban Water Services of Tomorrow; http://www.trust-i.net/index.php). The main objective of TRUST is to support water authorities and utilities in Europe in formulating and implementing appropriate urban water policies as well as new technology and management solutions in order to enhance urban water cycle services. Baseline assessments of the sustainability of Urban Water Cycle Services (UWCS) have been made for 11 cities (van Leeuwen, 2013). Hamburg performed well and had a high Blue City Index. This is in line with previous studies performed by Siemens (German green city Index, 2012). In 2011, the city of Hamburg was awarded the title “European Green Capital” by the European Commission because of its ambitious targets in sustainability, climate and environmental protection. In order to improve the sustainability of UWCS in cities it is essential that cities share their best practices, for instance via a dedicated website. In this way cities can learn from each other in their transition towards more sustainable UWCS and become part of the solution!

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Publication

Publication: GIS-based methodology for pluvial flood riskanalysis in Hamburg - Méthodologie SIG pour l'analyse des risquesd’inondation pluviale à Hambourg. Released at NOVATECH 2013.

As one of many consequences of the ongoing climate change an increasing frequency of occurringextreme rainfall events which may cause surcharged urban drainage systems and flooded urban areasis expected for Central Europe within next decades. Therefore the development of appropriateadaptation and prevention strategies to reduce pluvial flood damages requires a sound risk analysisbased on the assessments of hazards and of vulnerabilities. In the last few years, variousmethodologies and approaches in particular of hazard analysis have been introduced and established. Within the RISA project (Rain InfraStructure Adaptation) the following GIS-based methodology for apluvial hazard and risk analysis has been developed for the city of Hamburg by the means of a casestudy. The key objectives of the methodology are an optimal use of available municipal data sources, a high degree of automation in the application and a good transferability to the entire city areacombined with a reliable quality of results.

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Publication

Publication: Laying the foundation for stormwater strategy

The City of Hamburg, Germany, is integrating sustainable rainwater Management measures into its urban development plans to meet future challenges. Niels-Peter Bertram, Axel Waldhoff and Gerrit Bischoff of HAMBURG WASSER report on several tools used to develop a comprehensive Geographic Information System that will help lay the foundation of an Integrated RainWater System (IRWS) necessary to mitigate increasing stormwater runoff.

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