KlimEx - Climate Change and Extreme Hydrological Events – Risks and Prospects for Water Management in Bavaria

Background and Goals

Not least by the partially dramatic consequences of the flood events (2013, 2005, 2002, 1999) or the extended periods of drought (autumn 2011, spring 2007, summer 2003 and 2015) of the recent past in Bavaria, the consideration of hydrological extreme events has moved into the focus of interest. In addition to the challenges of better predicting such situations and the consequences of accompanying risk management, there is still no reliable evidence as to whether and how climate change contributes to the accumulation and exacerbation of extreme hydrological events.
While changes in the frequency and intensity of such climate change-related extreme events are expected, they can not yet be adequately quantified. However, an improved understanding of the processes involved and system relationships is an important prerequisite for adapting the water management to accompanying risks and their dynamic changes. The KlimEx project addresses this problem and aims to analyze the causes of extreme hydrological events with a focus on floods.
The integration of the supercomputer SuperMUC of the Leibniz Computing Center enables for the first time the innovative use of a very large model ensemble. These help to better quantify the uncertainties associated with the dynamics of flood events under the influence of climate change.
Thus, KlimEx provides a significantly expanded basis for adapting water management to risks and dynamic changes and for deriving recommendations for the predictive management of Bavarian water resources.

Content time

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Research area/region

Country
  • Canada
Region of implementation (all German federal states)
  • Bavaria
Spatial resolution 

Climate projection data generated in the project include the European domain and Eastern Canada at 12 km resolution.

Steps in the process of adaptation to climate change

Step 1: Understand and describe climate change

Approach and results 

Climate modeling with scenario RCP8.5; new climate model ensemble with 50 runs of a GCM-RCM combination

Parameter (climate signals)
  • River flooding
  • Heat waves
  • Altered rainfall patterns
  • Higher average temperatures
  • Low water
  • Extreme precipitation (incl. hail, snow)
  • Dry periods

Step 2a: Identify and assess risks - climate effects and impact

Approach and results 

Water balance modeling for Bavaria with 3h data of the climate projections

Step 3: Develop and compare measures

Time horizon
  • Presence
  • 2021–2050 (near future)
  • 2036–2065
  • 2051–2080 (far future)
  • 2071–2100 (far future)

Participants

Funding / Financing 

Bavarian Ministry of the Environment and Consumer Protection

Project management 

Department of Geography, Ludwig-Maximilian University of Munich

Cooperation/Partners 

Pooling the competences of various project partners in KlimEx creates added value for Bavarian water research and practice:
Global and regional climate modeling: Consortium on Regional Climatology and Adaptation to Climate Change, Montreal, Canada
Hydrological modeling: Ludwig Maximilian University, Munich / Center d'Expertise hydrique du Québec, Montreal, Canada / École de Technologie Superieure, Montreal, Canada
High Performance Computing and Data Management: Leibniz Computing Center, Garching; Ludwig Maximilians University, Munich
Technical support: Bavarian State Office for the Environment (LfU)

Contact

Bayerisches Landesamt für Umwelt (LfU)
Referat 81 - Klimawandel und Wasserhaushalt
Bürgermeister-Ulrich-Straße 160
86179 Augsburg

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Fields of action:
 water regime and water management