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Dr.-Ing. Uwe Ehret

Room: 304
Phone: +49 721 608-41933
Uwe EhretPza9∂kit edu

KIT Campus Süd

Institut für Wasser und Gewässerentwicklung

Lehrstuhl für Hydrologie

Geb. 10.81

Otto-Amman-Platz 1

D-76131 Karlsruhe



Research Interests

  • Hydrological modeling on the lower mesoscale
    • Water-, energy- and mass cycles including feedbacks
    • Connective structures
  • Model evaluation
    • Evaluation criteria
    • Quantification of uncertainties
  • Hydrometeorology
    • Design storms
    • Quantitative Precipitation Estimation (QPE) using weather radar
  • River basin management
    • Operational flood forecasting
    • Quantification of uncertainties
    • Reservoir management

Professional Activities

Invited talks (selected, since 2012)

  • 2016/10: Bias Correction in Climate Studies: Road to progress or dead end street? Berlin Workshop on Bias Correction in Climate Studies, Berlin.
  • 2016/04: Recent developments for the advancement of hydrological modeling. European Geophysical Society General Assembly 2016, Vienna.
  • 2014/12: Observation- and Model-based Quantitative Precipitation Estimation (QPE) using weather radar. Seminar at the Institut für Meteorologie und Klimaforschung, Garmisch-Partenkirchen. Together with M. Neuper.
  • 2014/05: 'CAOS' - Catchments as Organized Systems: Goals and Current State of the DFG Research group, Forschungsforum Kryosphäre und Geomorphologie & Wasser und Klima, Universität Zürich, Schweiz.
  • 2013/12: Catchments As Organized Systems - Goals and first results. Seminar at the Department of Hydrology and Water Resources, Uni Arizona, Tucson, USA.
  • 2013/10: Series distance - a metric for the quantification of hydrograph errors and forecast uncertainty, simultaneously for timing and magnitude. International Workshop 'Evaluating Probabilistic Forecasts of Multivariate Quantities', Uni Heidelberg.
  • 2013/10: Neue Entwicklungen bei der radarbasierten quantitativen Niederschlagsschätzung. KRdL-Expertenforum 'Wetterradar - Anwendungen und neue Entwicklungen', Umweltministerium, Bonn.
  • 2013/05: Maximum Power as an optimality principle for dynamics of (bio-)hydrological sys-tems? Biohydrology conference, Uni Landau.
  • 2012/07: Sollten wir Bias-Korrekturverfahren auf Ergebnisse globaler und regionaler Klimamodelle anwenden? KLIWA-Fachgespräch, LUBW Karlsruhe.

Community Service (selected, since 2012)

  • 2016/04: Convener of Union Level Session 'Models in the Geosciences', General Assembly of the European Geophysical Union, Vienna.
  • 2016/04: Organizer International Workshop 'Information Theory and the Earth Sciences', Schneefernerhaus, Germany. Financial support by DFG.
  • since 2014: Editor for Hydrology and Earth System Sciences (HESS): Open Access Journal, Impact Factor 3.64.
  • since 2011: Convener of Session 'Data & Models, Induction & Prediction, Information & Uncertainty: Towards a common framework for model building and predictions in the Geosciences', General Assembly of the European Geophysical Union, Vienna.
  • Project Referee for UK Natural Environment Research Council (NERC)
  • Reviews for HYP (Hydrological Processes), WRR (Water Resources Research), NHESS (Natural Hazards and Earth System Sciences), HESS (Hydrology and Earth System Sciences), MetZet (Meteorologische Zeitschrift), Vadose Zone, HyWa (Forum für Hydrologie und Wasserbewirtschaftung), Entropy.

Memberships

  • International Association of Hydrological Sciences IAHS
  • European Geosciences Union EGU
  • American Geophysical Union AGU

Projects

  • Radar-based analysis of severe rainfall events at Landgut Lingental
  • DFG Research unit FOR 1598 'CAOS' (From Catchments as Organized Systems to Models based on Functional Units), phase 2. Project 'Towards consistent predictions of water and energy cycles in intermediate scale catchments'.
  • Analysis and improvement of the flood-warning-system for the Goldersbach river. City of Tübingen.
  • DFG Research unit FOR 1598 'CAOS' (From Catchments as Organized Systems to Models based on Functional Units). Project 'Quantitative Precipitation Estimation (QPE) by exploiting the potential of advanced weather radar observations and data assimilation'.
  • DFG Research unit FOR 1598 'CAOS' (From Catchments as Organized Systems to Models based on Functional Units). Project 'An adaptive process based model framework for water-, energy- and mass cycles in lower mesoscale catch-ments'.
  • Development of a flood-forecasting system for the Bühlot river based on Weather Radar and Micro-Rain-Radar. Flood-protection association Baden-Bühl.
  • Integral development concepts for alpine rivers. Bavarian State Agency for the Environment.
  • Basin-wide coordinated reservoir management for extreme events. Bavarian State Agency for the Environment.

Publications


Submitted publications


Peer-reviewed publications in ISI-listed journals

Seibert, S. P., U. Ehret and E. Zehe (2016): Disentangling timing and amplitude errors in streamflow simulations. Hydrol. Earth Syst. Sci. 20 (9), 3745-3763, 10.5194/hess-20-3745-2016.

Bauer, H.-S., T. Schwitalla, V. Wulfmeyer, A. Bakhshaii, U. Ehret, M. Neuper and O. Caumont (2015): Quantitative precipitation estimation based on high-resolution numerical weather prediction and data assimilation with WRF - a performance test. 2015, 10.3402/tellusa.v67.25047.

Zehe, E., U. Ehret, L. Pfister, T. Blume, B. Schröder, M. Westhoff, C. Jackisch, S. J. Schymanski, M. Weiler, K. Schulz, N. Allroggen, J. Tronicke, L. Van Schaik, P. Dietrich, U. Scherer, J. Eccard, V. Wulfmeyer and A. Kleidon (2014): HESS Opinions: From response units to functional units: a thermodynamic reinterpretation of the HRU concept to link spatial organization and functioning of intermediate scale catchments. Hydrol. Earth Syst. Sci. 18 (11), 4635-4655, 10.5194/hess-18-4635-2014.

Skublics, D., S. P. Seibert and U. Ehret (2014): Abbildung der Hochwasserretention durch hyd-rologische und hydrodynamische Modelle unter unterschiedlichen Randbedingungen. Hy-drologie und Wasserbewirtschaftung 58 (3), 178-189, 10.5675/HyWa_2014,3_2.

Seibert, S. P., D. Skublics and U. Ehret (2014): The potential of coordinated reservoir operation for flood mitigation in large basins - A case study on the Bavarian Danube using coupled hydrological-hydrodynamic models. Journal of Hydrology 517 (0), 1128-1144, http://dx.doi.org/10.1016/j.jhydrol.2014.06.048.

Crochemore, L., C. Perrin, V. Andréassian, U. Ehret, S. P. Seibert, S. Grimaldi, H. Gupta and J.-E. Paturel (2014): Comparing expert judgement and numerical criteria for hydrograph evaluation. Hydrological Sciences Journal 60 (3), 402-423, 10.1080/02626667.2014.903331.

Ehret, U., H. V. Gupta, M. Sivapalan, S. V. Weijs, S. J. Schymanski, G. Blöschl, A. N. Gelfan, C. Harman, A. Kleidon, T. A. Bogaard, D. Wang, T. Wagener, U. Scherer, E. Zehe, M. F. P. Bierkens, G. Di Baldassarre, J. Parajka, L. P. H. Van Beek, A. Van Griensven, M. C. Westhoff and H. C. Winsemius (2014): Advancing catchment hydrology to deal with pre-dictions under change. Hydrol. Earth Syst. Sci. 18 (2), 649-671, 10.5194/hess-18-649-2014.

Zehe, E., U. Ehret, T. Blume, A. Kleidon, U. Scherer and M. Westhoff (2013): A thermodynamic approach to link self-organization, preferential flow and rainfall-runoff behaviour. Hydrol. Earth Syst. Sci. 17 (11), 4297-4322, 10.5194/hess-17-4297-2013.

Hrachowitz, M., H. H. G. Savenije, G. Blöschl, J. J. Mcdonnell, M. Sivapalan, J. W. Pomeroy, B. Arheimer, T. Blume, M. P. Clark, U. Ehret, F. Fenicia, J. E. Freer, A. Gelfan, H. V. Gup-ta, D. A. Hughes, R. W. Hut, A. Montanari, S. Pande, D. Tetzlaff, P. A. Troch, S. Uhlen-brook, T. Wagener, H. C. Winsemius, R. A. Woods, E. Zehe and C. Cudennec (2013): A decade of Predictions in Ungauged Basins (PUB)—a review. Hydrological Sciences Jour-nal, 1-58, 10.1080/02626667.2013.803183.

Kleidon, A., E. Zehe, U. Ehret and U. Scherer (2013): Thermodynamics, maximum power, and the dynamics of preferential river flow structures at the continental scale. Hydrol. Earth Syst. Sci. 17 (1), 225-251, 10.5194/hess-17-225-2013.

McIntyre, N., Ballard, C., Bruen, M., Bulygina, N., Buytaert, W., Cluckie, I., Dunn, S., Ehret, U., Ewen, J., Gelfan, A., Hess, T., Hughes, D., Jackson, B., Kjeldsen, T., Merz, R., Park, J., O’Connell, E., O’Donnell, G., Oudin, L., Todini, E., Wagener, T. and Wheater, H. (2012): Modelling the hydrological impacts of rural land use change. Hydrology Research, in press.

Ehret, U., E. Zehe, V. Wulfmeyer, K. Warrach-Sagi and J. Liebert (2012): HESS Opinions "Should we apply bias correction to global and regional climate model data?" Hydrol. Earth Syst. Sci. 16 (9), 3391-3404, 10.5194/hess-16-3391-2012.

Ruiz-Villanueva, V., Borga, M., Zoccatelli, D., Marchi, L., Gaume, E., Ehret, U. and E. Zehe (2011): Extreme runoff response to short-duration convective rainfall in South-West Germany. Submitted 10/2011 to Hydrology and Earth System Sciences.

Ehret, U. (2011): Evaluation of operational weather forecasts: Applicability for flood forecasting in alpine Bavaria. Meteorologische Zeitschrift 20 (4), 373-381.Ehret, U., Zehe, E. (2011): Series distance - an intuitive metric to quantify hydrograph similarity in terms of occurrence, amplitude and timing of hydrological events. Hydrology and Earth System Sciences 15 (3), 877-896, 10.5194/hess-15-877-2011.

Ehret, U. (2010): Convergence Index: a new performance measure for the temporal stability of operational rainfall forecasts. Meteorologische Zeitschrift 19 (5), 441-451.

Ranzi, R., Bacchi, B., Ceppi, A., Cislaghi, M., Ehret, U., Jaun, S., Marx, A., Hegg, C. and M. Zappa (2009): Real-time demonstration of hydrological ensemble forecasts in map d-phase. Houille Blanche-Revue Internationale De L Eau (5), 95-104, 10.1051/lhb/2009061.


Peer-reviewed publications

Kleidon, A., E. Zehe, U. Ehret and U. Scherer (2013): Maximum Power Limits, Dissipative Structures, and Planetary Interactions. in: Beyond the Second Law: Entropy Production and Non-equilibrium Systems, 2014 edition (November 30, 2013) ed., edited by: Dewar, R. C., Lineweaver, C. H., Niven, R. K., and Regenauer-Lieb, K., Understanding Complex Systems, Springer, 400 pages.

Skublics, D., S.P. Seibert and U. Ehret (2013): Abbildung der Hochwasserretention durch hydrologische und hydrodynamische Modelle unter unterschiedlichen Randbedingungen-Sensitivitätsanalyse am Donauabschnitt zwischen Neu-Ulm und Donauwörth", accepted, Hydrologie und Wasserbewirtschaftung.

Ehret, U., E. Zehe, V. Wulfmeyer, K. Warrach-Sagi and J. Liebert (2013): Sollten wir Bias-Korrekturverfahren auf Ergebnisse globaler und regionaler Klimamodelle anwenden? Forum für Hydrologie und Wasserbewirtschaftung 33.13, 175-188, ISBN 978-3-944328-02-7.

Haag, I., U. Ehret, N. Demuth and K. Moritz (2013): ProFoUnD - Ein Werkzeug zur statistischen Analyse von Abfluss- und Wasserstandvorhersagen und zur Ermittlung von Vorhersageunsicherheiten. Forum für Hydrologie und Wasserbewirtschaftung 33.13, 93-104, ISBN 978-3-944328-02-7.

Ehret, U. (2012): (Un-)sicherheiten in der hydrologischen Modellierung und Vorhersage. KW - Korrespondenz Wasserwirtschaft 6, 316-321, 10.3243/kwe2012.06.002.

Ehret, U., J. Götzinger, A. Bárdossy and G. G. S. Pegram (2008): Radar-based flood forecasting in small catchments, exemplified by the Goldersbach catchment, Germany. Interna-tional Journal River Basin Management 6 (4), 323-329.

Ehret, U. (2003): Rainfall and Flood Nowcasting in Small Catchments using Weather Radar. Mitteilungen / Institut für Wasserbau, Universität Stuttgart: H. 121 Stuttgart: Institut für Wasserbau, Universität Stuttgart. 

 

Other publications

Ehret, U., T. Schwitalla, M. Neuper, H. S. Bauer, A. Bakhshaii-Shahrbabaki and V. Wulfmeyer (2013): Neue Entwicklungen bei der radarbasierten quantitativen Niederschlagsschätzung. KRdL Expertenforum 'Wetterradar - Anwendungen und neue Entwicklungen'. Bonn, KrDL im VDI und DIN. 47: 101 - 110, ISBN 978-3-931384-78-4.

Laurent, S., U. Ehret, I. Meyer, K. Moritz and A. Vogelbacher (2010): Dealing with Uncertainty of Hydrological Forecasts in the Bavarian Danube Catchment. Hydrological Processes of the Danube River Basin. M. Brilly, Springer.

Ehret, U. and T. Schmidt (2005): Operationelle Hochwasservorhersage in Bayern am Beispiel des Illerhochwassers im Januar 2004. DWA Landesverband Bayern Mitglieder-Rundbrief (1), 31-33.

Ehret, U., Bárdossy, A. (2002): Hochwasser - Staatsfeind Nr. 1. Wechselwirkungen, Jahrbuch aus Lehre und Forschung der Universität Stuttgart, 2002, pp. 52-61, Selbstverlag Universität Stuttgart.

Resumee

Academic career

03/92 – 08/96        University of Applied Sciences Stuttgart

  • Civil Engineering
  • Thesis: 'Space-time rainfall modelling in the Aller catchment under consideration of climate change effects'

10/96 – 05/98        University of Stuttgart

  •  Civil Engineering. Major: Water Resources Management and Hydromechanics
  •  Thesis: 'Space-time rainfall modelling in the Aller catchment under consideration of climate change effects'

09/97 – 04/98        University of Waterloo (Canada): Exchange studies. Major: 'Environmental Engineering'

06/98 – 09/02        University of Stuttgart

  • Phd (Prof. Bárdossy, Institute for Modelling Hydraulic and Environmental Systems)
  • PhD thesis: 'Rainfall and Flood Nowcasting in Small Catchments Using Weather Radar'

 

Professional career

06/98 – 09/02        University of Stuttgart, Institute for Modelling Hydraulic and Environmental Systems

  • Junior Researcher, PhD student

11/02 – 10/08        Water Management Agency Kempten

  • Head of the Flood Forecasting Center Iller/Lech

11/08 – 02/11        TU München, Department of Hydrology and River Basin Management

  • Senior Researcher, Deputy Head

since 03/11              KIT Karlsruhe, Institut für Wasser und Gewässerentwicklung, Bereich Hydrologie

  • Senior Researcher, Deputy Head
  • since 08/15: KIT Associate Fellow