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Dr. Andreas Hartmann


Akademischer Rat


Professur für Hydrologie
Albert-Ludwigs-Universität Freiburg
79098 Freiburg

Tel: 0761 - 203 3520
Fax: 0761 - 203 3594 
Raum-Nr: 01.019

andreas hartmann


Personal webpage                        also find me on Google Scholar and ResearchGate






Almost a quarter of the world population obtains its drinking water from karst systems.

Climate models indicate that many karst regions will experience a serious decrease of precipitation and a strong increase of temperature. The predicted changes can have a significant impact on the hydrological regimes and suggest a significant increase in stress on karst water resources – even without consideration of increasing water demand. Simulation models can quantify the impacts of climate and land use change. However, in most cases a lack of data to set up the models properly or deficiencies in the process representation within the model structures make predictions of karst water resources highly uncertain and applications at large scales almost impossible.
Hartmann, et al. (2014, RoG)


Better prediction models

There is a way to reduce the lack of available information by adding more information than only discharge to the model calibration. Hydrochemical data is often available because large karst springs are frequently monitored for their water quality. Using these observations more process-based karst models can be applied. Due to a better representation of karst processes such models have higher reliability in water resources prediction.
Hartmann, et al. (2013, WRR)   |   Hartmann, et al (2013, AWR)   |   Hartmann, et al. (2012, HESS)


Large-scale simulations

The forcings for large scale karst simulation models are readily available. But difficulties in the assessment of model parameters at such scales still prohibit large scale applications. Newly developed regionalization methods including the use of signatures may allow the transition of model parameters to ungauged karst aquifers. However, they require adaptions especially regarding the evolution of the dissolution enlarged karst network and the respective model parameters.
Hartmann et al. (2014c, GMD)   |   Hartmann et al. (2013, HESS)


Challenge of prediction

The coupling of climate simulation models and karst models results in strong uncertainties. Applying karst models backwards may allow to reduce this uncertainty. By defining critical thresholds of water availability, the models can be solved backwards to determine the range of respective climatic or land use conditions. Additionally, climate archives in karst caves (speleothems) may be used to understand how the hydrological system reacted on extreme climatic changes in the past and how it may react in the future.
Hartmann et al. (2014, EGU)   |   Hartmann et al. (2012, JoH)


BIOGRAPHY                                                                                                                  Seitenanfang


from July 2014 Lecturer at the Chair of Hydrology, Faculty of Environment and Natural Resources, Albert-Ludwigs-University of Freiburg, Germany
from May 2013 Postdoc at the Department of Civil Engineering, University of Bristol, UK
Mar 2014 - May 2014 Visiting Fellow at the Department of Civil Engineering, McGill University, CA
Jan 2013 - Apr 2013 Postdoc at the Chair of Hydrology, Faculty of Environment and Natural Resources, Albert-Ludwigs-University of Freiburg, Germany
Mar 2009 - Jan 2013 PhD student at the Chair of Hydrology, Faculty of Environment and Natural Resources; Title:“Modeling karst hydrology and hydrochemistry in different climates and at different scales considering uncertainty” , Albert-Ludwigs-University of Freiburg, Germany
Mar 2009 - Apr 2013 Member of the Graduate School "Environment, Society and Global Change", Faculty of Environment and Natural Resources, Albert-Ludwigs-University of Freiburg, Germany
Oct 2003 - Sep 2008 Student of Diplom Hydrology (MSc equivalent); Minors: Geology, Meteorology, Mathematics; Albert-Ludwigs-University of Freiburg, Germany



from July 2014 Research Scientist at the Chair of Hydrology, Faculty of Environment and Natural Resources, Albert-Ludwigs-University of Freiburg, Germany
May 2013 - June 2014 Research Associate at the Department of Civil Engineering, University of Bristol, UK
Mar 2008 - Apr 2013 Research Assistant at the Institute of Hydrology, Faculty of Environment and Natural Resources, Albert-Ludwigs-University of Freiburg, Germany


Honours and Awards

Sept 2014 Front Cover of Reviews of Geophysics (Hartmann et al., 2014a)
Aug 2014 Front Cover of Water Resources Research (Hartmann et al., 2014b)
Dec 2013 Prize for excellent commitment for PhD students by the International Graduate Academy (IGA) of the Albert-Ludwigs-University of Freiburg, Germany
Jun 2013 Groundwater research prize of the City of Dresden
Jun 2013 Research spotlight in an American Geophysical Union (AGU) journal (Hartmann et al. 2013b)
Apr 2013 Jim Dooge award for best 2012 publication in Hydrology and Earth System Sciences (Hartmann et al. 2012c)
Feb 2013 2a Postdoc scholarship by the DAAD
Jan 2013 Defense of PhD with highest honor (summa cum laude)
Nov 2012 
2nd prize in the "Young Scientist of the Year" competition, awarded by the big German newspaper Die Zeit and academics.de for an excellent research project and social engagement
Apr 2011 Travel Award of the European Geosciences Union (EGU)
Jan 2010 3a PhD scholarship by the Evangelisches Studienwerk Villigst e.V.
Sep 2009 Young Karst Researcher Prize, International Association of Hydrogeologists IAH, Commission on Karst Hydrology
Feb 2009 Alumni award of the Faculty of Forest and Environmental Sciences, Albert-Ludwigs-University of Freiburg, Germany, for an excellent final exam, social engagement and an excellent master thesis


Memberships and Commissions

2015 - today Member of the Project 3 of EURO FRIEND
2015 - today Member of the EGU Subdivision on Catchment Hydrology
2015 - today Member of the EGU Subdivision on Groundwater
2014 - today Contibuting member of the Commission on Karst of the International Association of Hydrogeologists IAH
2014 - today Member of the British Hydrological Society
2012 - today Member of the American Geophysical Union (AGU)
2011 - today Member of the German Hydrological Society (DHG)
2009 - today Member of the European Geosciences Union (EGU)
2006 - today Member of the Förderverein Hydrologie at the University of Freiburg


Academic Service

Journal Reviewing for Nature Climate Change, Water Resources Research, Hydrology and Earth System Sciences, Journal of Hydrology, Hydrogeology Journal, Journal of Hydrometeorology, International Journal of Speleology, Hydrological Processes, Geoscientific Model Development, Science of the Total Environment, Environmental Earth Sciences Journal, Environmental Modeling an Software
Session convener and co-convener at the 2013 and 2014 Fall meeting of the American Geophysical Union (AGU) and the 2014 and 2015 General Assembly of the European Geoscience Union (EGU)
Member of the Scientific Committee of the IAH International Conference on Groundwater in Karst, 20-26 June 2015, Birmingham, UK


Other Commitment

Sep 2014 - today Academic member of the graduate school “Environment, Society and Global Change” at Faculty of Environment and Natural Resources
July 2014 - today Member of SciNet - Network for Young Scientists and Academics at the University of Freiburg
Nov 2012 - May 2015 Elected member of the UniWind advisory committee, a Forum of Universities supporting researchers at the early stages of their careers (substituting member since Max 2015)
July 2011 - Nov 2012 Coordinator of the “Work Group on the legal status of PhD students and co-determination” at the PhD-Initiative
Jun 2011 - Nov 2012 Elected Representative of the PhD scholarshipholders of the Evangelisches Studienwerk Villigst e.V. at the PhD-Initiative
Apr 2010 - Jan 2013 Founding Member of ProDoc, the “Initiative to establish a PhD representation of the entire Freiburg University“
Mar 2009 - Nov 2012 Elected PhD representative of graduate school "Environment, Society and Global Change"
Oct 2007 - Sept 2008 Elected Student representative at three faculty commissions (“Fakultätsrat”, “Studienkommission”, “Berufsungskommission W3 Professur”) at the Faculty of Faculty of Environment and Natural Resources at Freiburg University


PROJECTS                                                                                                                  Seitenanfang


2014 - 2016 AWSEK-DB: Achieving Water Security in Europe’s Karst regions – Creation of a karst database
Funded by the Innovation Fund of Freiburg University and RiSC of the Ministry for Science, Research and Art of Baden-Wuerttemberg
2013 - 2014 Large scale assessment of the importance of karst regions for human water security under current and potential future conditions
Funded by the German Academic Exchange Service (DAAD)


PEOPLE                                                                                                                  Seitenanfang

People -presently-

Fanny Sarazin: Evapotranspiration in Karst regions (PhD student, University of Bristol, co-advised)
Vera Marx: Karst data base and data acquisition (employed within the AWSEK-DB project)
Moritz Mährlein: Advanced methods for the evaluation of process-based hydrological models (MSc thesis, primary supervisor)
Lara Kirn: A time dynamic GIS based recharge estimation method for Mediterranen karst regions (MSc thesis, primary supervisor)
Simon Brenner: Simulation of Groundwater Inundation during the UK 2013 Floods (MSc thesis, primary supervisor)
Axel Keeß: Interaction of Snowmelt and Bedrock Permeability (MSc thesis, primary supervisor)


Former Students

Chenfei Yang (MSc dissertation, University of Bristol)
Thomas Godman (MSc dissertation, University of Bristol)
Jie Jin (MSc dissertation, University of Bristol)
Weijie Su (MSc dissertation, University of Bristol)


PUBLICATIONS                                                                                                                  Seitenanfang

Journals (peer reviewed)

Gunkel, a., Shadeed, S., Hartmann, a., Wagener, T. and Lange, J. (2015): Model signatures and aridity indices enhance the accuracy of water balance estimations in a data-scarce Eastern Mediterranean catchment, J. Hydrol. Reg. Stud., 4, 487–501, doi:10.1016/j.ejrh.2015.08.002.
Hartmann, A., Kobler, J., Kralik, M., Dirnböck, T., Humer, F. and Weiler, M. (2015): Model aided quantification of dissolved carbon and nitrogen release after windthrow disturbance in an Austrian karst system, Biogeosciences Discuss., 12, 11987–12026, doi:10.5194/bgd-12-11987-2015.
Hartmann, A., Gleeson, T., Rosolem, R., Pianosi, F., Wada, Y. and Wagener, T. (2015): A large-scale simulation model to assess karstic groundwater recharge over Europe and the Mediterranean, Geosci. Model Dev., 8(6), 1729–1746, doi:10.5194/gmd-8-1729-2015, 2015. EGU Highlight Article
Hartmann, A,, Mudarra M., Andreo B., Marin A., Wagener T., and Lange J. (2014b): Modeling spatio-temporal impacts of hydro-climatic extremes on a karst aquifer in Southern Spain. Water Resources Research, DOI: 10.1002/2014WR015685. Front Cover of issue.
Hartmann, A., Goldscheider, N., Wagener, T., and Weiler, M. (2014a): Karst water resources in a changing world: Review of hydrological modeling approaches, Reviews of Geophysics, DOI: 10.1002/2013rg000443. Front Cover of issue.
Rimmer A, A Hartmann (2014): Optimal hydrograph separation filter to evaluate transport routines of hydrological models. Journal of Hydrology. 514, 249-57.
Hartmann, A., Weiler, M., Wagener, T., Lange, J., Kralik, M., Humer, F., Mizyed, N., Rimmer, A., Barberá, J. A., Andreo, B., Butscher, C., and Huggenberger, P. (2013c): Process-based karst modelling to relate hydrodynamic and hydrochemical characteristics to system properties, Hydrology and Earth System Sciences, 17, 3305-3321, 10.5194/hess-17-3305-2013.
Hartmann, A., Wagener, T., Rimmer, A., Lange, J., Brielmann, H., and Weiler, M. (2013b): Testing the realism of model structures to identify karst system processes using water quality and quantity signatures, Water Resources Research, 49, 3345–3358, 10.1002/wrcr.20229. AGU research spotlight
Hartmann, A., Barberá, J. A., Lange, J., Andreo, B., and Weiler, M. (2013a): Progress in the hydrologic simulation of time variant recharge areas of karst systems – exemplified at a karst spring in Southern Spain, Advances in Water Resources, 54, 149-160, 10.1016/j.advwatres.2013.01.010.
Hartmann, A., Lange, J., Weiler, M., Arbel, Y., and Greenbaum, N. (2012c): A new approach to model the spatial and temporal variability of recharge to karst aquifers, Hydrol. Earth Syst. Sci., 16, 2219-2231, 10.5194/hess-16-2219-2012.
Jim Dooge award for best 2012 publication
Hartmann, A., Lange, J., Vivó Aguado, À., Mizyed, N., Smiatek, G., and Kunstmann, H. (2012b): A multi-model approach for improved simulations of future water availability at a large Eastern Mediterranean karst spring, Journal of Hydrology, 468-469, 130-138, 10.1016/j.jhydrol.2012.08.024.
Hartmann, A., Kralik, M., Humer, F., Lange, J., and Weiler, M. (2012a): Identification of a karst system’s intrinsic hydrodynamic parameters: upscaling from single springs to the whole aquifer, Environmental Earth Sciences, 65, 2377-2389, 10.1007/s12665-011-1033-9.
Samuels, R., Rimmer, A., Hartmann, A., Krichak, S., Alpert, P. (2010): Climate Change Impacts on Jordan River Flow: Downscaling Application from a Regional Climate Model. Journal of Hydrometeorology, 11(4): 860-879.DOI 10.1175/2010JHM1177.1


Book Chapters

Hartmann, A., Mudarra, M., Marín, A., Andreo, B., & Wagener, T. (2015): Relating Land Surface Information and Model Parameters for a Karst System in Southern Spain. In B. Andreo, F. Carrasco, J. J. Durán, P. Jiménez, & J. W. LaMoreaux (Eds.), Hydrogeological and Environmental Investigations in Karst Systems SE - 39 (Vol. 1, pp. 345–352). Springer Berlin Heidelberg. doi:10.1007/978-3-642-17435-3_39
Hartmann, A., A. Rimmer, J. Lange, T. Wagener, and M. Weiler (2012): Identifizierung und Evaluierung von Karstmodellen mittels systembeschreibender Zielfunktionen, in Wasser ohne Grenzen - Beiträge zum Tag der Hydrologie am 22./23. März an der Albert-Ludwigs-Universität Freiburg, herausgegeben von Markus Weiler, pp. 97-103, Institut für Hydrologie Freiburg, Germany. ISBN 978-3-942964-38-8
Rimmer, A., and A. Hartmann (2012): Simplified conceptual structures and analytical solutions for groundwater discharge using reservoir equations, in Water Resources Management and Modeling, edited by D. P. C. Nayak, InTech, ISBN 978-953-51-0246-5
Hartmann, A., Kralik, M., Humer, F., Lange, J., Weiler, M. (2010): Hydrological Modeling of an Alpine Dolomite Karst System. In: Andreo, B., Carrasco, F., Durán, J., LaMoreaux, J. (Eds.), Advances in Research in Karst Media. Springer, pp. 526.ISBN 978-3642124853


Selected Conference Contributions and talks

Hartmann, A. (2015): Subsurface heterogeneity and water balance – lessons learned from modeling karst watersheds at different scales, Seminar at the Dept. of Limnology & Bio-Oceanography, University of Vienna (A). Invited presentation
Hartmann, A. (2015): Subsurface heterogeneity and water balance – at which scales does it matter?, “lunch lecture” seminar series at the Faculty of Geosciences, Utrecht University (NL) Invited presentation
Hartmann A, Gleeson T, and Wagener T (2014): Sensitivity of Mediterranean groundwater resources to potential climate futures. EGU General Assembly 16, EGU2014-7995.
Hartmann A, Gleeson T, Rosolem R, Pianosi F, and Wagener T (2014): Understanding recharge elasticity through large-scale simulations of Europe’s karst regions under varying climatic boundary conditions. EGU General Assembly 16, EGU2014-7976.
Hartmann, A. (2014): Understanding recharge elasticity through large-scale simulations of Europe’s karst regions under varying climatic boundary conditions, Environmental and Water Resource Engineering Seminar Series of the Department of Civil Engineering, McGill University (CA). Invited presentation
Hartmann, A. (2014): Modellierung von Karstsystemen mittels neuer Ansätze und hydrochemischer Information, Dresdner Grundwassertage 2013. Invited presentation
Hartmann A, Kobler J, Kralik M, Dirnböck T, Humer F, and Weiler M (2014): Deriving the time-variant transit time distributions of an Austrian karst system by a semi-distributed karst model. EGU General Assembly 16, EGU2014-7152. Invited presentation
Hartmann, A. (2013): Modellierung unterschiedlicher Karstsysteme in Europa und im Nahen Osten mittels flächenkonzentrierter Ansätze und hydrochemischer Information. Hydrogeologisches Fachgespräch des Institut für angewandte Geowisseschaften, Karlsruhe Institute of Technology.  Invited presentation
Hartmann A. (2013): The challenge of predicting karst water resources in a changing world, American Geophysical Union 2013 Fall Meeting, San Francisco. Invited presentation
Hartmann, A., J. Lange, M. Weiler, Y. Arbel, and N. Greenbaum (2011): Modeling the variability of karstic recharge - a multi-objective approach, presented at European Geosciences Union General Assembly, Copernicus Geophysical Research Abstracts, Vienna (Austria). EGU travel award
Vivó Aguado, À., A. Hartmann, J. Lange, and R. L. Garcìa Bartual (2011): Assessment of spring water resources of the Faria Catchment,West Bank, paper presented at European Geosciences Union General Assembly, Vienna (Austria).
Hartmann, A., J. Lange, M. Weiler, and M. Kralik (2009): A "grey box" approach to model epikarst flow and hydrochemistry in different climatic regions, presented at Sustainability of the karst environment - dinaric karst and other karst regions, Center for karst, Plitvice Lakes (Croatia). Young Karst Researcher Prize

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