Publications of JProf. Dr. Andreas Hartmann

• Journal Articles
• Book chapters
• Talks
• Conference papers
• Other publications

Journal Articles

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2020

• Berthelin, R., Rinderer, M., Andreo, B., Baker, A., Kilian, D., Leonhardt, G., Lotz, A., Lichtenwoehrer, K., Mudarra, M, Padilla, I.Y., Pantoja Agreda, F. Rosolem,, R., Vale, A., Hartmann, A.
  A soil moisture monitoring network to characterize karstic recharge and evapotranspiration at five representative sites across the globe
  2020 Geosci Instrum Meth, volume: 9, pages: 11 - 23
• Hartmann, A., Jasechko, S., Gleeson, T., Wada, Y., Andreo, B., Barberá, J.A., Brielmann, H., Bouchaou, L., Charlier, J.-B., Darling, W. G., Filippini, M., Garvelmann, J., Goldscheider, N., Kralik, M., Kunstmann, H., Ladouche, B., Lange, J., Lucianetti, G., Martín, J. F., Mudarra, M., Sanchez, D., Stumpp, C., Zagana, E., Wagener, T.
  Danger of groundwater contamination widely underestimated because of shortcuts for aquifer recharge
  2020 EarthArXiv (preprint)
• Olarinoye, T., Gleeson, T., Marx, V., Seeger, S., Adinehvand, R., Allocca, V., Andreo B., Apaéstegui, J., Apolit, C., Arfib, B., Auler, A., Barberá, J.A., Bechtel , T., Binet, S., Bittner, D., Blatnik, M., Bolger, T., Brunet, P., Charlier, J.-B., Chen, Z., Chiogna, G., Coxon, G., de Vita, P., Doummar, J., Epting, J., Fournier, M., Goldscheider, N., Gunn, J., Guo, F., Guyot, J.L., Hidalgo Sanchez, L., Howden, N., Huggenberger, P., Hunt, B., Jeannin, P.-Y., Jiang, G., Jones, G., Jourde, H., Karmann, I., Koit, O., Kordilla, J., Labat, D., Ladouche, B., Serena Liso, I., Liu, Z., Massei, N., Mazzilli, N., Mudarra, M., Parise, M., Pu, J., Ravbar, N., Santo, A., Sauter, M., Sivelle, V., Worthington, S., Skoglund, R.Ø., Stevanovic, Z., Wood, C., Hartmann, A.
  Global karst springs hydrograph dataset for research and management of the world’s fastest-flowing groundwater
  2020 Sci Data, volume: 7
• Mewes, B., Oppel, H., Marx, V., Hartmann, A.
  Information based machine‐learning for tracer signature prediction in karstic environments
  2020 Water Resour Res, volume: 56, issue: 2
• Hartmann, A., Liu, Y., Olarinoye, T., Berthelin, R., Marx, V.
  Integrating field work, large sample hydrology and modeling to inform (inter)national governance of karst water resources
  2020 EarthArXiv (preprint)
• Kingston, D.G., Massei, N., Dieppois, B., Hannah, D.M., Hartmann, A., Lavers, D.A., Vidal, J.‐P.
  Moving beyond the catchment scale: value and opportunities in large‐scale hydrology to understand our changing world
  2020 Hydrol Process, pages: 1 - 7
• Wagener, T., Gleeson, T., Coxon, G., Hartmann, A., Howden, N., Pianosi, F., Rahman, M., Rosolem, R., Stein, L., Woods, R.
  On doing large-scale hydrology with Lions: Realising the value of perceptual models and knowledge accumulation
  2020 EarthArXiv (preprint)
• Baker, A., Berthelin, R., Cuthbert, M. O., Treble, P. C., Hartmann, A., the KSS Cave Studies Team
  Rainfall recharge thresholds in a subtropical climate determined using a regional cave drip water monitoring network
  2020 Journal of Hydrology
• Liu, Y., Wagener, T., Beck, H., Hartmann, A.
  What is the hydrologically effective size of a catchment?
  2020 EarthArXiv (preprint)

2019

• Mudarra, M., Hartmann, A., Andreo, B.
  Combining Experimental Methods and Modeling to Quantify the Complex Recharge Behavior of Karst Aquifers
  2019 Water Resour Res, volume: 55, pages: 1384 - 1404
• Baker, A., Hartmann, A., Duan, W., Hankin, S., Comas-Bru, L., Cuthbert, M.O., Treble, P.C., Banner, J., Genty, D., Baldini, L.M., Bartolomé, M., Moreno, A., Pérez-Mejías, C., Werner, M.
  Global analysis reveals climatic controls on the oxygen isotope composition of cave drip water
  2019 Nat Commun, volume: 10, page: 2984
• Gleeson, T., Wagener, T., Doell, P., Bierkens, M., Wada, Y., Lo, M.-H., Taylor, R., Rahman, S., Rosolem, R., Hill, M., West, C., Cuthbert, M., Oshinlaja, N, Zipper, S., Luijendijk, E., Bresciani, E., Hartmann, A., De Graaf, I., Famiglietti, J., Kollet, S., Maxwell, R., Condon, L., Scanlon, B., Kim, H., Ducharne, A.
  Groundwater representation in continental to global hydrologic models: a call for open and holistic evaluation, conceptualization and classification
  2019 EarthArXiv (preprint)
• Fan, Y., Clark, M., Lawrence, D.M., Swenson, S., Band, L.E., Brantley, S.L., Brooks, P.D., Dietrich, W.E., Flores, A., Grant, G., Kirchner, J.W., Mackay, D.S., McDonnell, J.J., Milly, P.C.D., Sullivan, P.L., Tague, C., Ajami, H., Chaney, N., Hartmann, A., Hazenberg, P., McNamara, J., Pelletier, J., Perket, J., Rouholahnejad-Freund, E., Wagener, T., Zeng, X., Beighley, E., Buzan, J., Huang, M., Livneh, B., Mohanty, B.P., Nijssen, B., Safeeq, M., Shen, C., van Verseveld, W., Volk, J., Yamazaki, D.
  Hillslope Hydrology in Global Change Research and Earth System Modeling
  2019 Water Resour Res, volume: 55, pages: 1737 - 1772
• Chifflard, P., Blume, T., Maerker, K., Hopp, L., van Meerveld, I., Graeff, T., Gronz, O., Hartmann, A., Kohl, B., Martini, E., Reinhardt‐Imjela, C., Reiss, M., Rinderer, M., Achleitner, S.
  How can we model subsurface stormflow at the catchment scale if we cannot measure it?
  2019 Hydrol Process, volume: 33, pages: 1378 - 1385
• Sprenger, M., Stumpp, C., Weiler, M., Aeschbach, W., Allen, S.T., Benettin, P., Dubbert, M., Hartmann, A., Hrachowitz, M., Kirchner, J.W., McDonnell, J., Orlowski, N., Penna, D., Pfahl, S., Rinderer, M., Rodriguez, N., Schmidt, M., Werner, C.
  The Demographics of Water: A Review of Water Ages in the Critical Zone
  2019 Rev Geophys, volume: 57

2018

• Xu, Z., Massei, N., Padilla, I., Hartmann, A., Hu, B.
  Characterization , modeling and remediation of karst in a changing environment
  2018 Environ Earth Sci, volume: 77, issue: 476
• Chen, Z., Hartmann, A., Wagener, T., Goldscheider, N.
  Dynamics of water fluxes and storages in an Alpine karst catchment under current and potential future climate conditions
  2018 Hydrology and Earth System Sciences, volume: 22, pages: 3807 - 3823
• Zipper, S. C., Dallemagne, T., Gleeson, T., Boerman, T. C., Hartmann, A.
  Groundwater Pumping Impacts on Real Stream Networks: Testing the Performance of Simple Management Tools
  2018 Water Resour Res, volume: 54, issue: 8, pages: 5471 - 5486
• Brenner, S., Coxon, G., Howden, N.J.K., Freer, J., Hartmann, A.
  Process-based modelling to evaluate simulated groundwater levels and frequencies in a Chalk catchment in south-western England
  2018 Nat Hazard Earth Sys, volume: 18, pages: 445 - 461
• Sarrazin, F., Hartmann, A., Pianosi, F., Rosolem, R., Wagener, T.
  V2Karst V1.1: A parsimonious large-scale integrated vegetation–recharge model to simulate the impact of climate and land cover change in karst regions
  2018 Geosci Model Dev, volume: 11, pages: 4933 - 4964

2017

• Chen, Z., Hartmann, A., Goldscheider, N.
  A new approach to evaluate spatiotemporal dynamics of controlling parameters in distributed environmental models
  2017 Environmental Modelling & Software, volume: 87, issue: 1-16
• Adinehvand, R., Raeisi, E., Hartmann, A.
  A step-wise semi-distributed simulation approach to characterize a karst aquifer and to support dam construction in a data-scarce environment
  2017 J Hydrol, volume: 554, pages: 470 - 481
  » show abstract« hide abstract
  Abstract

  Karst systems provide significant volumes of drinking water for large parts of the world population. Due to chemical weathering, karst systems are characterized by strong heterogeneity resulting in a complex flow and storage behaviour. Presently available karst modelling strategies account for the karstic heterogeneity but often a lack of data limits their applicability in data-scarce regions. In this study, a step-wise simulation approach with a semi-distributed karst model is proposed to characterize a karst aquifer at a data-scarce region in Southwest Iran and to evaluate the leakage potential related to a future dam construction project at a river that cuts through the aquifer. Observed groundwater level time series were applied to calibrate and validate the model. In order to avoid over-parameterization, the karst aquifer was split into three sections down the hydraulic gradient. At each section, groundwater level observations were used to iteratively calibrate the model from the first to the last section. A spatial split-sample test and sensitivity analysis served to evaluate the prediction performance and the identifiability of the model parameters. Finally, simple scenarios of the river infiltration into the aquifer were applied to evaluate the leakage potential of the aquifer for future dam constructions. The spatial split-sample test showed that the semi-distributed model provided reliable predictions but prediction performance and parameter identifiability decreased from the first towards the last aquifer section, most probably due to increased aquifer complexity and propagation of uncertainty from the up-gradient model section. Using sensitivity analysis, we also show that parameter sensitivities increase significantly if parameter estimation was applied simultaneously to all three aquifer subsections. Using the model to assess the leakage potential indicated that, without further technical measures, the all river flow would be able infiltrate into the aquifer and the dam would never be filled up completely.
• Hartmann, A., Gleeson, T., Wada, Y., Wagener, T.
  Enhanced groundwater recharge rates and altered recharge sensitivity to climate variability through subsurface heterogeneity
  2017 P Natl Acad Sci Usa, volume: 114, issue: 11, pages: 2842 - 2847
• Hartmann, A., Baker, A.
  Modelling karst vadose zone hydrology and its relevance for paleoclimate reconstruction
  2017 Earth-sci Rev, volume: 172, pages: 178 - 192
  » show abstract« hide abstract
  Abstract

  Understanding past climatic changes allows us to better understand how our planet will evolve in the future. One important source of information on paleoclimate is the analysis of speleothems that develop in karst caves and conduits due to the dissolution and precipitation of calcite. However, there are many uncertainties in paleoclimatic reconstruction with speleothems; one of them being hydrological variability. Up to now only few studies have considered the impact of hydrological variability on speleothem formation and composition. This review paper will provide an introduction to hydrological processes that have the potential to affect speleothem composition and the hydrological modelling approaches that are able to account for them. It presents the current state of knowledge on paleoclimatic reconstruction using speleothems and shows that many important flow and transport processes have not yet been included in the interpretation of these archives, mostly due to a lack of field information to parametrize them. Possible directions of future research efforts therefore include a better exploration of karst vadose zone processes and new approaches to incorporate this information into simulation models. Finally, we foresee the exciting advances in reconstructing paleohydrology using karst hydrology models combined with speleothem growth rate and geochemical composition to understand how past climate changes affected the hydrological cycle and water availability.
• Hartmann, A., Barberá, J.A., Andreo, B.
  On the value of water quality data and informative flow states in karst modelling
  2017 Hydrology and Earth System Sciences, volume: 21, pages: 5971 - 5985
  » show abstract« hide abstract
  Abstract

  If properly applied, karst hydrological models are a valuable tool for karst water resources management. If they are able to reproduce the relevant flow and storage processes of a karst system, they can be used for prediction of water resources availability when climate or land use are expected to change. A common challenge to apply karst simulation models is the limited availability of observations to identify their model parameters. In this study, we quantify the value of information when water quality data (NO₃^− and SO₄^−2) is used in addition to discharge observations to estimate the parameters of a process-based karst simulation model at a test site in Southern Spain. We use a three-step procedure to (1) confine an initial sample of 500 000 model parameter sets by discharge and water quality observations, (2) identify alterations of model parameter distributions through the confinement, and (3) quantify the strength of the confinement for the model parameters. We repeat this procedure for flow states, at which the system discharge is controlled by the unsaturated zone, the saturated zone, and the entire time period including times when the spring is influenced by a nearby river. Our results indicate that NO₃^− provides most information to identify the model parameters controlling soil and epikarst dynamics during the unsaturated flow state. During the saturated flow state, SO₄^−2 and discharge observations provide the best information to identify the model parameters related to groundwater processes. We found reduced parameter identifiability when the entire time period is used as the river influence disturbs parameter estimation. We finally show that most reliable simulations are obtained when a combination of discharge and water quality date is used for the combined unsaturated and saturated flow states.

2016

• Schwerdtfeger, J., Hartmann, A., Weiler, M.
  A tracer-based simulation approach to quantify seasonal dynamics of surface-groundwater interactions in the Pantanal wetland
  2016 Hydrological Processes, volume: 30, issue: 15, page: 2590–2602
• Hartmann, A., Kobler, J., Kralik, M., Dirnböck, T., Humer, F., Weiler, M.
  Model-aided quantification of dissolved carbon and nitrogen release after windthrow disturbance in an Austrian karst system
  2016 Biogeosciences, volume: 13, pages: 159 - 174
• Hartmann, A.
  Putting the cat in the box: why our models should consider subsurface heterogeneity at all scales
  2016 WIREs Water, volume: 3, issue: 4, page: 478–486
• Berghuijs, W.R., Hartmann, A., Woods, R.A.
  Streamflow sensitivity to water storage changes across Europe
  2016 Geophys. Res. Lett., volume: 43, issue: 5, pages: 1980 - 1987

2015

• Hartmann, A., Gleeson, T., Rosolem, R., Pianosi, F., Wada, Y., Wagener, T.
  A large-scale simulation model to assess karstic groundwater recharge over Europe and the Mediterranean
  2015 Geosci Model Dev, volume: 8, issue: 6, pages: 1729 - 1746
• Gunkel, A., Shadeed, S., Hartmann, A., Wagener, T., Lange, J.
  Model signatures and aridity indices enhance the accuracy of water balance estimations in a data-scarce Eastern Mediterranean catchment
  2015 J. Hydrol. Reg. Stud., volume: 4, pages: 487 - 501

2014

• Hartmann, A., Goldscheider, N., Wagener, T., Lange, J., Weiler, M.
  Karst water resources in a changing world: Review of hydrological modeling approaches
  2014 Reviews of Geophysics, issue: 1, pages: 1 - 25
• Hartmann, A., Mudarra, M., Andreo, B., Marín, A., Wagener, T., Lange, J.
  Modeling spatiotemporal impacts of hydroclimatic extremes on groundwater recharge at a Mediterranean karst aquifer.
  2014 Water Resources Research, volume: 50, issue: 8, page: 6507–6521
• Rimmer, A., Hartmann, A.
  Optimal hydrograph separation filter to evaluate transport routines of hydrological models.
  2014 Journal of Hydrology, volume: 514, page: 249–257

2013

• Hartmann, A., Weiler, M., Wagener, T., Lange, J., Kralik, M., Humer, F., Huggenberger, P.
  Process-based karst modelling to relate hydrodynamic and hydrochemical characteristics to system properties
  2013 Hydrology and Earth System Sciences, volume: 17, issue: 8, pages: 3305 - 3321
• Hartmann, A., Barberá, J.A., Lange, J., Andreo, B., Weiler, M.
  Progress in the hydrologic simulation of time variant recharge areas of karst systems – Exemplified at a karst spring in Southern Spain
  2013 Advances in Water Resources, volume: 54, issue: 0, pages: 149 - 160
  » show abstract« hide abstract
  Abstract

  A specific characteristic of karst systems is the occurrence of time variant recharge areas. In our study we present a new type of hydrological karst model and a new calibration approach both considering this specific characteristic. The new model type considers the spatial variability of karst system properties by distribution functions, and is compared to a simple reservoir model. Both models are applied to a karst system in Southern Spain where objective functions applied on hydrodynamic and hydrochemical information helped to determine model parameters playing a role for hydrodynamic response. Thereafter, the recharge area is determined separately for individual hydrological years and for the entire time series by calibrating the model to match the water balance. We show that hydrochemical information is crucial to find a reasonable set of parameters for both models. Considering different hydrological years, we find that the recharge area is changing significantly (from 28 to 53 km2). The newly developed model is able to reproduce this variation and provide acceptable simulation results for the entire time series of available data. The classic reservoir model shows inferior performance concerning hydrodynamics and fails to reproduce the water balance because it does not consider variations of recharge area. Our calibration approach allows identifying a variable recharge area and our new model is able to reproduce its variability. Hence we obtain a more realistic system representation, which can be of high significance when models are used for prediction, i.e. beyond the conditions they were calibrated, e.g. for land-use or climate change scenarios.
• Hartmann, A., Wagener, T., Rimmer, A., Lange, J., Brielmann, H., Weiler, M.
  Testing the realism of model structures to identify karst system processes using water quality and quantity signatures.
  2013 Water Resources Research, volume: 49, page: 3345–3358

2012

• Hartmann, A., Lange, J., Vivó Aguado, À., Mizyed, N., Smiatek, G., Kunstmann, H.
  A multi-model approach for improved simulations of future water availability at a large Eastern Mediterranean karst spring
  2012 Journal of Hydrology, volume: 468–469, issue: 0, pages: 130 - 138
  » show abstract« hide abstract
  Abstract

  Summary Recent studies identified the Mediterranean as a region particularly vulnerable to climate change. Since a large fraction of the region’s water originates from karst aquifers, information about their future water availability is important for sustainable water management. This study presents an ensemble of 50 model chains considering five different realisations of the A1B ECHAM5 and HadCM3 climate projections, two different averaging methods to transfer the climate variables to the system scale and five different hydrological models that represent reasonable conceptualizations of the karst system. The ensemble is applied to Faria spring, a large Eastern Mediterranean karst spring in the West Bank. We show that for the near future (2021–2051) variability resulting from the different climate change projections and five different models is too large to draw conclusions on any significant change. In the remote future (2068–2098), variability decreases and our simulations suggest a decrease of water availability of −15% to −30%. We also assess the impact of recent pumping activities by running our hydrological models with recently measured data. There is a strong indication that the spring, which dried out in 2007, would have still yielded significant amounts of water if groundwater extractions had been limited. This calls for a better management of groundwater abstractions to meet future water needs in this drought-prone Mediterranean region.
• Hartmann, A., Lange, J., Weiler, M., Arbel, Y., Greenbaum, N.
  A new approach to model the spatial and temporal variability of recharge to karst aquifers
  2012 Hydrology and Earth System Sciences, volume: 16, issue: 7, pages: 2219 - 2231
• Hartmann, A., Kralik, M., Humer, F., Lange, J., Weiler, M.
  Identification of a karst system’s intrinsic hydrodynamic parameters: upscaling from single springs to the whole aquifer
  2012 Environmental Earth Sciences, volume: 65, issue: 8, pages: 2377 - 2389

2010

• Samuels, R., Rimmer, A., Hartmann, A., Krichak, S., Alpert, P.
  Climate Change Impacts on Jordan River Flow: Downscaling Application from a Regional Climate Model.
  2010 Journal of Hydrometeorology, volume: 11, issue: 4, page: 860–879

Book chapters

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2020

• Martín-Arias, J., Hartmann, A., Mudarra, M., Martínez-Santos, P., Andreo, B.
  Simplified VarKarst Semi-distributed Model Applied to Joint Simulations of Discharge and Piezometric Variations in Villanueva Del Rosario Karst System (Malaga, Southern Spain)
  In: Eurokarst 2018, Besançon. Advances in Karst Science
  2020, Springer, Cham, pages: 145 - 150, ISBN: 978-3-030-14014-4
• Berthelin, R., Hartmann, A.
  The Shallow Subsurface of Karst Systems: Review and Directions
  In: Eurokarst 2018, Besançon. Advances in Karst Science
  2020, Springer, Cham, pages: 61 - 68, ISBN: 978-3-030-14014-4
• Berthelin, R., Scheller, M., Berg, J., Hartmann, A.
  Using soil moisture observations to characterize Karst groundwater recharge processes at five contrasting climate regions
  In: L. Land, C. Kromhout, & M. Byle (Eds.): Proceedings of the Sixteenth Multidisciplinary Conference on Sinkholes and the Engineering and Environmental Impacts of Karst (first edition): NCKRI Symposium 8
  2020, Carlsbad (NM): National Cave and Karst Research Institute, pages: 220 - 229,

2017

• Hartmann, A.
  Experiences in calibrating and evaluating lumped karst hydrological models
  In: Advances in Karst Research: Theory, Fieldwork and Applications
  2017, Geological Society of London, pages: 331 - 340,
• Kirn, L., Mudarra, M., Marín, A., Andreo, B., Hartmann, A.
  Improved Assessment of Groundwater Recharge in a Mediterranean Karst Region: Andalusia, Spain
  In: EuroKarst 2016, Neuchâtel
  2017, Springer, Cham, pages: 117 - 125, ISBN: 978-3-319-45464-1

2015

• Hartmann, A., Mudarra, M., Marín, A., Andreo, B., Wagener, T.
  Relating Land Surface Information and Model Parameters for a Karst System in Southern Spain
  In: Hydrogeological and Environmental Investigations in Karst Systems
  2015, Springer, pages: 345 - 352, ISBN: 978-3-642-17434-6

2012

• Hartmann, A., Rimmer, A., Lange, J., Wagener, T., Weiler, M.
  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
  2012, , page: 97–103,
• Rimmer, A., Hartmann, A.
  Simplified conceptual structures and analytical solutions for groundwater discharge using reservoir equations
  In: Water Resources Management and Modeling
  2012, InTech, pages: 217 - 338, ISBN: 978-953-51-0246-5

2010

• Hartmann, A., Kralik, M., Humer, F., Lange, J., Weiler, M., LaMoreaux, J. W.
  Hydrological Modeling of an Alpine Dolomite Karst System
  In: Advances in Research in Karst Media
  2010, Springer, pages: 223 - 229, ISBN: 978-3642124853

Talks

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2018

• Hartmann, A.
  Modelling karst hydrology and its relevance for paleoclimate reconstruction
  2018 Institut für Geowissenschaften, Johannes Gutenberg-Universität Mainz (Invited Presentation)
• Hartmann, A.
  Exploration and Quantification of Karst Water Resources - From Plot to Continental Scales
  2018 Lehrstuhl für Hydrologie und Flussgebietsmanagement, Technische Universität München (Invited Presentation)
• Hartmann, A.
  Karst Water Resources - Processes, Controlling Factors and Availability
  2018 University of New South Wales, Water Research Laboratory, Manly Vale, Australia (Invited Presentation)

2017

• Hartmann, A.
  Karst Water Resources - Processes, Controlling Factors and Availability
  2017 The Pennsylvania State University, USA (Invited Presentation)
• Hartmann, A., Wagener, T.
  Where in the world is subgrid heterogeneity and lateral redistribution likely important to ET over a large ESM model grid?
  2017 CUAHSI Cyberseminar Series on Hillslope Hydrology in Earth System Models

2015

• Hartmann, A.
  Subsurface heterogeneity and water balance – at which scales does it matter?
  2015 “lunch lecture” seminar series at the Faculty of Geosciences, Utrecht University (NL) (Invited presentation)
• Hartmann, A.
  Subsurface heterogeneity and water balance – different uncertainties at different scales
  2015 Seminar at Institute of Meteorology and Climate Research Atmospheric Environmental Research (IMK-IFU), Campus Alpin, Garmisch-Partenkirchen. (Invited presentation)
• Hartmann, A.
  Subsurface heterogeneity and water balance – lessons learned from modeling karst watersheds at different scales
  2015 Seminar at the Dept. of Limnology & Bio-Oceanography, University of Vienna (A) (Invited presentation)

2014

• Hartmann, A.
  Understanding recharge elasticity through large-scale simulations of Europe’s karst regions under varying climatic boundary conditions
  2014 Environmental and Water Resource Engineering Seminar Series of the Department of Civil Engineering, McGill University. (Invited presentation)

2013

• Hartmann, A.
  Modellierung unterschiedlicher Karstsysteme in Europa und im Nahen Osten mittels flächenkonzentrierter Ansätze und hydrochemischer Information
  2013 Hydrogeologisches Fachgespräch des Institut für angewandte Geowisseschaften, Karlsruhe Institute of Technology. (Invited presentation)

Conference papers

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2020

• Chang, Y., Liu, L., Jiang, G., Hartmann, A., Wu, J.
  Can the electrical conductivity of karst spring discharge improve the identification of model structures and reduce simulation uncertainty?
  2020 EGU General Assembly , pages: EGU2020 - 3781
• Dirnböck, T., Brielmann, H., Kobler, J., Hartmann, A.
  Drivers of long-term and short-term Nitrogen concentrations and runoff dynamics in a forested karst catchment
  2020 EGU General Assembly , pages: EGU2020 - 4463
• Maier, M., Osterholt, L., Hartmann, A.
  Dynamics and effects of soil CO2 on carbonate dissolution and transport in response to precipitation events
  2020 EGU General Assembly , pages: EGU2020 - 19189
• Liu, Y., Wagener, T., Hartmann, A.
  Flow simulation in karst regions from the scale of single aquifers to entire continents
  2020 EGU General Assembly , pages: EGU2020 - 653
• Rahman, M., Hartmann, A.
  Impacts of hydrogeological heterogeneity on groundwater transit time
  2020 EGU General Assembly , pages: EGU2020 - 7211
• Baker, A., Treble, P., Hartmann, A., Cuthbert, M., Markowska, M., Berthelin, R., Tadros, C., Leopold, M., Hankin, S.
  Insights into recharge processes and speleothem proxy archives from long-term monitoring networks of cave drip water hydrology
  2020 EGU General Assembly , pages: EGU2020 - 1686
• Ozdemir Calli, K., Melsen, L., Hartmann, A.
  Model Assessment Strategy in a Karst Hydrological Model Using a Process-based Diagnostic Tool
  2020 EGU General Assembly , pages: EGU2020 - 20141
• Scheller, M., Blatnik, M., Kogovšek, B., Liu, Y., Mayaud, C., Petrič, M., Ravbar, N., Hartmann, A.
  Modeling spatial and temporal hydrologic variability of karst vulnerability at a large Slovenian karst aquifer
  2020 EGU General Assembly , pages: EGU2020 - 1009

2019

• Hartmann, A.
  A global dataset of simulated karstic groundwater recharge to support water management and speleothem analysis
  2019 46th IAH Congress, Malaga
• Liu, Y., Wagener, T., Beck, H., Hartmann, A.
  Accounting for Intercatchment Groundwater Flow in Karst Regions and Beyond (Invited)
  2019 American Geophysical Union Fall Meeting
• Olarinoye, T., Gleeson, T., Hartmann, A.
  Applicability of automatic recession extraction methods to a large number of karst spring hydrographs
  2019 International Karstological School “Classical Karst”. Postojna, Slovenia.
• Ozdemir Calli, K., Hartmann, A.
  Applicability of recession extraction approaches and recession analysis methods procedures to karstic springs
  2019 EGU General Assembly Geophysical Research Abstracts, volume: 21, pages: EGU2019 - 8722
• Schwemmle, R., Hartmann, A., Beck, H.
  Climatic and Physiographic Controls on Errors of Large-scale Hydrological Models
  2019 EGU General Assembly Geophysical Research Abstracts, volume: 21, pages: EGU2019 - 155
• Olarinoye, T., Gleeson, T., Hartmann, A.
  Comparative analysis of karst spring hydrographs using automatic recession methods
  2019 46th IAH Congress, Malaga
• Hartmann, A., Ireson, A.
  Conceptual modelling to predict groundwater flooding in Chalk regions
  2019 EGU General Assembly Geophysical Research Abstracts, volume: 21, pages: EGU2019 - 4520
• Liu, Y., Wagener, T., Hartmann, A.
  Contrasting the behaviour of karstic and non-karstic hydrologic processes at the catchment scale
  2019 46th IAH Congress, Malaga
• Sarrazin, F., Hartmann, A., Rosolem, R., Pianosi, F., Wagener, T.
  Does land cover change in karst regions have a larger impact than climate change on future groundwater recharge?
  2019 EGU General Assembly Geophysical Research Abstracts, volume: 21, pages: EGU2019 - 8249
• Berthelin, R., Hartmann, A.
  From point to catchment scale – using soil moisture observations to understand karstic discharge behavior at the Swabian Alb (Germany)
  2019 EGU General Assembly Geophysical Research Abstracts, volume: 21, pages: EGU2019 - 1308
• Berthelin, R., Hartmann, A.
  From point to catchment scale – using soil moisture observations to understand karstic discharge behavior at the Swabian Alb (Germany)
  2019 EGU General Assembly Geophysical Research Abstracts, volume: 21, pages: EGU2019 - 1308
• Olarinoye, T., Gleeson, T, Marx, V., Hartmann, A.
  The first global database of karst spring discharge observations
  2019 EGU General Assembly Geophysical Research Abstracts, volume: 21, pages: EGU2019 - 1157

2018

• Hartmann, A., Hopp, L., Payeur-Poirier, J.L.
  Estimating the value of hydrodynamic and hydrochemical signatures to identify subsurface storm flow
  2018 EGU General Assembly Geophysical Research Abstracts, volume: 20, pages: EGU2018 - 7267-2
  
   
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• Hartmann, A.
  From the Karst Springs of the Jordan River to Entire Continents - Challenges and Opportunities of Large-Scale Karst Modelling
  2018 Eurokarst, Besançon (France) (Invited Keynote Lecture dedicated to Alon Rimmer († April 22nd 2018))
• Sarrazin, F., Hartmann, A., Rosolem, R., Pianosi, F.,, Wagener, T.
  How does future groundwater recharge depend on climate , land cover and subsurface heterogeneities in the European and Mediterranean region?
  2018 EGU General Assembly Geophysical Research Abstracts, volume: 20, pages: EGU2018 - 8480
• Berthelin, R., Hartmann, A.
  Setting up a high-resolution monitoring network to understand soil moisture and epikarst dynamics at 5 sites across the globe
  2018 Eurokarst, Besançon (France)
• Olarinoye, T., Marx, V., Hartmann, A.
  Unravelling the hydrodynamic behavior of karst systems through comparative hydrology
  2018 Eurokarst, Besançon (France)

2017

• Sarrazin, F., Hartmann, A., Pianosi, F., Wagener, T.
  A large-scale integrated karst-vegetation recharge model to understand the impact of climate and land cover change
  2017 EGU General Assembly Geophysical Research Abstracts, volume: 19, pages: EGU2017 - 8509
• Hartmann, A., Ireson, A. M.
  Conceptual modelling to predict unobserved system states - The case of groundwater flooding in the UK Chalk
  2017 American Geophysical Union Fall Meeting
• Hartmann, A., Gleeson, T., Wada, Y., Wagener, T.
  Enhanced recharge rates and altered recharge sensitivity to climate variability through subsurface heterogeneity
  2017 EGU General Assembly Geophysical Research Abstracts, volume: 19, pages: EGU2017 - 12796
• Hartmann, A., Brielmann, H.
  Isotope supported recession analysis to assess hydraulic properties of karst aquifers across Austria
  2017 EGU General Assembly Geophysical Research Abstracts, volume: 19, pages: EGU2017 - 19493
• Hartmann, A., Jasechko, S., Gleeson, T., Wada, Y., Andreo, B., Barberá, J.A., Brielmann, H., Charlier, J.B., Darling, G., Filippini, M., Garvelmann, J.,, Goldscheider, N., Kralik, M., Kunstmann, H., Ladouche, B., Lange, J., Martín, J.F., Mudarra, M., Rimmer, A., Sanchez, D., Stumpp, C., Wagener, T.
  Recharge heterogeneity and high intensity rainfall events increase contamination risk for Mediterranean groundwater resources
  2017 EGU General Assembly Geophysical Research Abstracts, volume: 19, pages: EGU2017 - 13762

2016

• Hartmann A.
  Parameter estimation and model evaluation in karst regions - A balance of data availability and process representation
  2016 Peter Wolf Symposium of the British Hydrological Society, Bristol (UK) (Invited Keynote Lecture)
• Hartmann A.
  Impact of wind throws on water quality and quantity at an alpine forest at the Kalkalpen National Park (Austria)
  2016 Forstwissenschaftliches Seminar am Freiburger Institut für Forstwissenschaften, Freiburg (Invited Presentation)
• Brenner, S., Marx, V., Hartmann, A.
  A database to assess impacts of land use and climate change on Europe’s karst regions
  2016 Eurokarst, Neuchâtel (CH)
• Hartmann, A.
  Challenges in estimating karst water resources quantity and quality
  2016 Karst Dynamics Laboratory, Guilin (China) (Invited Presentation)
• Hartmann, A.
  Herausforderungen des Grundwasserschutz in Karst Gebieten (Invited Presentation)
  2016 Frühjahrstagung der Schweizerische Gesellschaft für Hydrogeologie SGH
• Sarrazin, F., Hartmann, A., Pianosi, F., Wagener T.
  How much does subsurface heterogeneity alter the impact of climate and land use changes on groundwater recharge?
  2016 EGU General Assembly Geophysical Research Abstracts, volume: 18, pages: EGU2016 - 12263
• Kirn, L., Mudarra, M., Marin, A., Andreo, B., Hartmann, A.
  Improved Assessment of Groundwater Recharge in a Mediterranean Karst Region ‐ Andalusia, Spain
  2016 Eurokarst, Neuchâtel (CH)
• Hartmann, A., Gleeson, T., Wada, Y., Wagener, T.
  Large-scale assessment of present day and future groundwater recharge and its sensitivity to climate variability in Europe’s karst regions
  2016 American Geophysical Union Fall Meeting (Invited Presentation)
• Hartmann, A.
  Large-scale simulation of karst processes - parameter estimation, model evaluation and quantification of uncertainty
  2016 American Geophysical Union Fall Meeting (Invited Presentation)
• Hartmann, A., Baker, A.
  Overview of karst modelling approaches and their relevance for paleoclimate reconstruction
  2016 EGU General Assembly Geophysical Research Abstracts, volume: 18, pages: EGU2016 - 613
• Berghuijs, W., Hartmann, A., Woods, R.
  Streamflow sensitivity to water storage changes across Europe
  2016 EGU General Assembly Geophysical Research Abstracts, volume: 18
• Hartmann, A., Gleeson, T., Wada, Y., Wagener, T.
  Subsurface heterogeneity at Europe’s karst regions enhances present day recharge and future climate sensitivity
  2016 Eurokarst, Neuchâtel (CH)
• Sarrazin, F., Hartmann, A., Pianosi, F., Wagener, T.
  To what extent do preferential pathways alter the impact of climate and land cover change on groundwater recharge
  2016 American Geophysical Union Fall Meeting
• Hartmann, A., Gleeson, T., Wada, Y., Wagener, T.
  Transit time distributions to assess present and future contamination risk of karst aquifers over Europe and the Mediterranean
  2016 EGU General Assembly Geophysical Research Abstracts, volume: 18, pages: EGU2016 - 8701

2015

• Hartmann, A., Marx, V.
  A database to assess impacts of land use and climate change on Europe’s karst regions
  2015 International Conference on Groundwater in Karst KG@B, Birmingham, UK
• Sarrazin, F., Hartmann, A., Pianosi, F., Wagener, T.
  Does the relative impact of climate and land use changes on groundwater recharge vary depending on the degree of subsurface heterogeneity?
  2015 American Geophysical Union Fall Meeting
• Hartmann, A., Gleeson, T., Wada, Y., Wagener, T.
  Enhanced recharge rates and a greater vulnerability to climate variations in regions with heterogeneous subsurface
  2015 American Geophysical Union Fall Meeting
• Hartmann, A.
  Modelling karst hydrology - a balance of available information and model complexity
  2015 International Conference on Groundwater in Karst KG@B, Birmingham, UK (Invited Keynote Lecture)
• Hartmann, A.
  Overview of karst modelling approaches and their relevance for paleoclimate reconstruction
  2015 American Geophysical Union Fall Meeting (Invited Presentation)

2014

• Hartmann, A., Kobler, J., Kralik, M., Dirnböck, T., Humer, F., Weiler, M.
  Deriving the time-variant transit time distributions of an Austrian karst system by a semi-distributed karst model.
  2014 EGU General Assembly Geophysical Research Abstracts, (Invited Presentation), volume: 16, pages: EGU2014 - 7152
• Rimmer, A., Hartmann, A.
  Optimal hydrograph separation filter to evaluate transport routines of hydrological models.
  2014 EGU General Assembly Geophysical Research Abstracts, pages: EGU2014 - 1016
• Hartmann, A., Gleeson, T., Wagener, T.
  Sensitivity of Mediterranean groundwater resources to potential climate futures
  2014 EGU General Assembly Geophysical Research Abstracts, volume: 16, pages: EGU2014 - 7995
• Hartmann, A., Gleeson, T., Wagener, T., Wada, Y.
  Simulating subsurface heterogeneity improves large-scale water resources predictions
  2014 American Geophysical Union 2014 Fall Meeting
• Hartmann, A., Gleeson, T., Rosolem, R., Pianosi, F., Wagener, T.
  Understanding recharge elasticity through large-scale simulations of Europe’s karst regions under varying climatic boundary conditions
  2014 EGU General Assembly Geophysical Research Abstracts, volume: 16, pages: EGU2014 - 7976

2013

• Hartmann, A., Lange, J., Weiler, M., Arbel, Y., Greenbaum, N.
  Controls of spatial structural variability on lateral and vertical flow dynamics at the soil-bedrock interface in a karst system
  2013 American Geophysical Union Fall Meeting
• Hartmann, A.
  Modellierung von Karstsystemen mittels neuer Ansätze und hydrochemischer Information
  2013 Dresdner Grundwassertage (Invited presentation)
• Hartmann, A.
  The challenge of predicting karst water resources in a changing world
  2013 American Geophysical Union Fall Meeting (Invited presentation)

2012

• Lange, J., Hartmann, A., Barberá, J. A., Andreo, B., Weiler, M.
  A new modeling and calibration approach considering time variant recharge areas in karst systems
  2012 American Geophysical Union Fall Meeting
• Hartmann, A., Wagener, T., Rimmer, A., Lange, J., Brielmann, H., Weiler, M.
  Testing the realism of model structures to identify karst system processes using water quality and quantity signatures
  2012 American Geophysical Union Fall Meeting

2011

• Vivó Aguado, À., Hartmann, A., Lange, J., Garcìa Bartual, R. L.
  Assessment of spring water resources of the Faria Catchment, West Bank
  2011 EGU General Assembly, Vienna (AT) Geophysical Research Abstracts, volume: 13, pages: EGU2011 - 10222
• Hartmann, A., Lange, J., Weiler, M., Arbel, Y., Greenbaum, N.
  Modeling the variability of karstic recharge - a multi-objective approach
  2011 EGU General Assembly, Vienna (AT) (EGU travel award) Geophysical Research Abstracts, volume: 13, pages: EGU2011 - 911
  » show abstract« hide abstract
  Abstract

  Many parts in the Mediterranean are karst regions, where groundwater balances the annual variability of water availability. In these regions recharge is controlled by the epikarst. Located at the upper parts of the carbonate rock, it acts as temporary storage and distribution system for infiltrating water into the karst system. Depending on precipitation, system state and location, diffuse as well as concentrated percolation, enhanced by lateral flow towards enlarged fissures, can occur. This results in a high spatial and temporal variability of karstic recharge. To adequately represent the dominating recharge processes in hydrological models is still a challenge, especially in data scare regions. In this study we have developed a conceptual, process-based model implementing the variability of karstic recharge. We hypothesize that the shape of the lower epikarst boundary to the rock matrix controls the abundance and quantity of lateral flow and hence concentrated infiltration. Introducing a power law function describing the boundary’s shape we define model compartments with varying depth. Reaching the semi-permeable lower boundary infiltrating water can create a perched water table and flow laterally towards neighboring compartments following the hydraulic gradient. This procedure results in a spatial pattern of percolation rates (one for each compartment), which sum up to a net percolation for a considered area. Hence, not only an average percolation rate but also information about its variability is simulated. The model was benchmarked with measured responses of a set of drips (stalactites) in a karstic cave at Mount Carmel, Northern Israel, which is located 28 m below surface. These data comprise both dripping rates and the concentration of selected tracers (EC, chloride, bromide). For model calibration we did not fit single hydrographs but statistical parameters of the average response function for all measured drips (mean, standard deviation, skewness). The model was applied to two different time scales. First, we simulated a two-day sprinkling experiment yielding high resolution data for dry and wet preconditions. Second, we applied the model to an entire season under natural conditions. Model performance and parameter values were analyzed and general recommendations for its use to simulate karst recharge were derived.

2009

• Hartmann, A., Lange, J., Weiler, M., Kralik, M.
  A "grey box" approach to model epikarst flow and hydrochemistry in different climatic regions
  2009 Sustainability of the karst environment - dinaric karst and other karst regions, Center for karst, Plitvice Lakes (Croatia). (Young Karst Researcher Prize)
• Hartmann, A., Lange, J., Rimmer, A.
  Applied dual porosity concept for large karst basins in the east Mediterranean
  2009 EGU General Assembly Geophysical Research Abstracts, volume: 11, pages: EGU2009 - 682
  » show abstract« hide abstract
  Abstract

  One of the most problematic aspects of modeling karst hydrology is the “system identification”, which is the conceptual structure of flow within a karstic system. In this study we simulate the conceptual flow system of two large karstic springs, which originate in the karstic region of the Hermon Mountain (Northern Israel). These springs contribute 300 million m3 annually, nearly 70% of the flow to the Upper Catchment of the Jordan River. Our findings are supported by daily measurements of spring discharge and weekly measurements of geochemical components over 35 years. The model couples the groundwater flows of these springs with mixing equations, and applied them simultaneously to both spring discharges and to three different solute concentrations. The conceptual karstic groundwater routine includes two small and fast-reacting reservoirs representing the springs’ conduit systems, and one large and slow-reacting reservoir representing the fissured-porous system (dual porosity concept). Both conduit reservoirs exchange flow with the fissured-porous system, which is linearly dependent on their difference in hydraulic potential. Thus flow between the conduit reservoirs and the fissured-porous reservoir is possible in both directions. Moreover, based on the real hydrological system, it was assumed that one conduit reservoir was located significantly higher than the conduit reservoir of the other. The model enabled the simultaneous solution of the spring flows and concentration of Nitrate [NO

Other publications

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2013

• Hartmann, A.
  Modeling karst hydrology and hydrochemistry at different scales and in different climates considering uncertainty
  PhD Thesis, Albert-Ludwigs-University, Freiburg, 2013