JProf. Dr. rer. nat. Marc Walther

Inhaltsverzeichnis

    1. ► Scientific Vita
    2. ► Teaching
    3. ► Research
    4. ► Projects
Bild Walther © TU Dresden Bild Walther © TU Dresden
Bild Walther

© TU Dresden

As a Junior-Professor for Contaminant Hydrology in joint appointment with the Helmholtz-Centre for Environmental Research - UFZ Leipzig, I am interested in water quality and quantity issues, particularly in near-coastal aquifer systems. Especially in (semi-)arid countries, the often fossil, non-renewable water resources are endangered by exploitation for various uses (in many cases for agricultural purposes). This results in limitation or water scarcity (from water drawdown), and contamination (e.g. salinization from seawater intrusion, pollution with agricultural substances, i.e. fertilizers, pesticides, or urban water pollutants) of the valuable water resources. Also, consequences for the adjacent ecosystems, e.g. eutrophication and pollution of coastal marine habitats, or influences on surface water catchments due to changes in groundwater budgets, need to be considered. These major threads for current generations will even increase for the future ones in the context of climate change and growing population, and therefore need to be encountered with a proper water assessment and management.

Bild Walther © TU Dresden

Junior-Professor

Name

Herr JProf. Dr. rer. nat. Marc Walther

Leiter Professur für Schadstoffhydrologie

Adresse work

Besucheradresse:

Neubau Chemie, CHE, Raum P204 Bergstr. 66

01069 Dresden

Deutschland

work Tel.
+49 351 463-40566
fax Fax
+49 351 463-42552

http://orcid.org/0000-0002-3180-1551

Sprechzeiten:

Freitag:
10:00 - 12:00
oder nach Vereinbarung

To give answers to the questions in these highly complex systems, I use OpenGeoSys, an open-source, scientific, numerical finite-element simulation toolbox. I am part of the development group of OpenGeoSys at the Department for Environmental Informatics of the Helmholtz-Centre for Environmental Research - UFZ Leipzig and through my work am contributing to the group Complex Groundwater Systems. Furthermore, I work in close cooperation with various research groups on the different aspects that emerge from this topic, especially through the CAWR group, e.g. colleagues from the Department of Hydrosciences of the TU Dresden, the UFZ Departments Computational Hydrosystems or Catchment Hydrology, as well as national and international scientists from the Leibniz University Hannover, the ZMT Brehmen, the BGR Hannover, or the Flinders University, Adelaide.

Feel free to contact me for any questions via email, I'll be happy to help.

► Scientific Vita

Academic Profile
10/2002 - 11/2008 Diploma study in Hydrology at TU Dresden
09/2005 - 08/2006 Study abroad at Uppsala Universitet (Sweden)
09/2007 - 12/2007 Internship geobild Stolpen
04/2008 - 05/2008 Internship JOANNEUM RESEARCH Graz
11/2008 Diploma Hydrology: Untersuchung von Wasserfluss und Stofftransport im Übergangsbereich zwischen gesättigter und ungesättigter Zone im Labor‐ und Feldmaßstab am Beispiel der SUIR‐Beprobungsvorrichtung in Wagna, Österreich. (Preis Hydrogeology der FH-DGG 2010»Link (pdf)
01/2009 - 02/2014 Scientific research & teaching staff at the Institute of Groundwater Management at TU Dresden
PhD Thesis "Variable-Density Flow Processes in Porous Media On Small, Medium and Regional Scales" (Award "Dresdner Grundwasserforschungspreis 2015" together with Dr. Aki Sebastian Ruhl)
08/2010 - 08/2013 Guest scientist at the Helmholtz-Zentrum for Environmental Research - UFZ Leipzig, Department of Environmental Informatics
09/2013 - 09/2015 Scientific research staff at the Helmholtz-Zentrum for Environmental Research, Leipzig, Department of Environmental Informatics
since 10/2015 Junior-Professor for Contaminant Hydrology in joint appointment with the Helmholtz-Zentrum for Environmental Research - UFZ Leipzig;
positive evaluation of the Junior-Professorship in 10/2018

► Teaching

Teaching Philosophy

I think that the education of young people is of fundamental importance for our future. In a world full of "now" and "fast", I feel that raising awareness for our environment, therewith developing interest in solving complex issues, and concurrently guiding students to acquire knowledge, will help us to make a better tomorrow.

From my own experience, I know that following lectures is sometimes not easy, if the topic may not seem relevant or too complicated (especially on Friday afternoons). This is why I try to offer a good balance in my lectures by combining: 1) plain, old-school lectures (to provide a solid background and motivation on the topic and methods), 2) collaborative and guided exercises (to get a feeling how to achieve a result), and 3) motivation to study the aspect to the students' interest on their own (through optional homework). I am confident that the synthesis of 1+2+3 > 6.

Individual studies can be enhanced through the supplemental teaching material which is provided below. These will be complemented in class by an active discussion on individual subjects, and topical exercises. While I am offering a couple topics for BSc and MSc theses, I am also open for the supervision of any individual ideas.

SS2018 MvH Evaluation © M. Walther / www.evaluationszielscheibe.at SS2018 MvH Evaluation © M. Walther / www.evaluationszielscheibe.at
SS2018 MvH Evaluation

© M. Walther / www.evaluationszielscheibe.at

This is how the students of the summer semester 2018 course "Modellierung von Hydrosystemen" evaluated the lecture series (see left figure).

Supplemental Lecture Material

Modellierung von Hydrosystemen - Schadstoffhydrologie SS 2018

Vorlesungsunterlagen von Prof. Kolditz sind hier zu finden: Vorlesung MvH Kolditz

Vorlesung & Übung

Alle Unterlagen des Teils "Schadstoffhydrologie" von JProf. Walther finden Sie im OPAL.

Exkursion

  • Bitte über OPAL einschreiben!
  • UFZ VisLab, Gebäude 7.2 vorr. am 22.06.2018; Beginn 10/14 Uhr; Dauer ca 2h
    Anreise: von Leipzig HBF mit der Strassenbahn (Linie 3/3E, Richtung Taucha oder Sommerfeld) bis zur Haltestelle "Permoser Straße / Wissenschaftspark" (7 Stationen vom HBF) [http://www.lvb.de/fahrplan]
    Lageplan
BSc & MSc Topic Offers

I will always be happy to assist you, if you are interested to write a Bachelor or Master-Thesis. Commonly, supervision will be provided by at least one additional supervisor, may that be a TU member or an external supervisor. 

Besides the topics offered through the Professorship of Groundwater Management, I am currently looking for keen students to work on the thematic issues listed below as their Bachelor or Master thesis.

  • "Adaptive Mesh Refinement for Variable Density Flow in Porous Media"
    Joint thesis with Prof. Oliver Sander, Professorship of Numerics of Partial Differential Equations, immediate begin possible
  • "Ableitung von Kolmationsparametern an Fließgewässern auf Basis direkter hydrologischer Daten", joint thesis with Dr. Peter Börke (LfULG), immediate begin possible
  • "Untersuchung und Auswirkungen der sohlerosionsbedingten Grundwasserabsenkung in Elbnähe im Freistaat Sachsen", joint thesis with Toni Düskau (LfULG), immediate begin possible
  • "Dataworth-basierte Optimierung eines fiktiven Grundwasser-Monitoring-Messnetzes für eine effiziente Detektion von Problem- und Schadstoffquellen", thesis in a cross-cutting topic of two research projects

Of course, you can always contact me directly to suggest your own topics and or get any further information.

Students may take a look at the current theses proposals of the institute here.

Supervised BSc & MSc Theses
  • Juliane Hendrich: Kostenvergleich von thermischen und druckbetriebenen Entsalzungsverfahren für die Aufbereitung saliner Grundwässer. BSc Thesis. Technische Universität Dresden, 2019.

  • Annalena Werner: Trinkwassermanagement auf Inseln unter Berücksichtigung von Standortfaktoren und zukünftige Herausforderung aufgrund des Klimawandels. BSc Thesis. Technische Universität Dresden, 2018.

  • Felix Vollberg: Einflussnahme des submarinen Grundwasserabflusses auf die Aktivität pathogener Vibrio spp.-Bakterien im marinen Sediment. Master Thesis. Universität Bremen, 2018.

  • Luciana Scrinzi: Water and Salt Balance of Vadamarachchi: salinity drivers for a brackish coastal lagoon in interaction with groundwater. Master Thesis jointly supervised with Acacia Water (The Netherlands). Technische Universität Dresden, 2018.

  • Nandini Vasanth Raman: Impact of exposure to low dose micropollutants on microbial biomass activity and community structure and fate of micropollutants in groundwater ecosystems. Master Thesis jointly supervised with the HelmholtzZentrum München (Institute for Groundwater Ecology). Technische Universität Dresden, 2018.

  • Laura Elisa Herr: Examination of suitable desalination processes for injection into hydraulic barriers. Master Thesis jointly supervised with the Institute for Chair of Process Engineering in Hydro Sciences (TUD). Technische Universität Dresden, 2018.

  • Pia Ebeling: Measures for seawater-intrusion remediation in shallow aquifers. Master Thesis. Technische Universität Dresden, 2018.

  • Laslo Städtler: Investigating heat transport as an indicator for groundwater flow and surface water interactions in a protected wetland system using Distributed Temperature Sensing (DTS) and modelling. Master Thesis jointly supervised with the British Geological Survey and the University of Birmingham. Technische Universität Dresden, 2017.
  • Elena Hubert: Bewertung von Verfahren der Regionalisierung von Grundwasserhöchstständen und Ableitung von Orientierungswerten für Bemessungsgrundwasserstände. Master Thesis. Technische Universität Freiberg, 2017.    
  • Maria Bölicke: Assessing the influence of non-steady pumping on the sea water intrusion length. Bachelor Thesis. Technische Universität Dresden, 2017.
  • Malte Ilgauds: Dichtegetriebene Verteilung von Wasser in der Wassersäule infolge submarinen und sublakrustinen Grundwasserzutritts und Möglichkeiten der Darstellung. Bachelor Thesis. Hochschule für Forstwirtschaft Rottenburg, 2017.
  • Astha Bista: Implementation of Heterogeneous Highresolution Saturated Groundwater Flow and Mass Transport Model for the Test Site Pirna for Analyzing Multiple Tracer Tests. Master Thesis. Technische Universität Dresden, 2015.
  • Linnet Chepkemei Ndiema: Evaluation of hydrogeological data and conception of a groundwater model for a field site in the south eastern part of Dresden, Saxony. Master Thesis. Technische Universität Dresden, 2015.
  • Robert Ladwig: Optimale Bewirtschaftung arider Küstenaquifere durch Einsatz dichteabhängiger Grundwasserströmungsmodellierung und Methoden der künstlichen. Master Thesis. Technische Universität Dresden, 2015.
  • Chao Li: Conception of a high-resolution saturated model for the test site Pirna. Master Thesis. Technische Universitat Dresden, 2014.
  • Genua Yusef: Investigating the Influence of Landside Boundary Condition Types on Saline Intrusion in Combination with Different Coastal Shelf Shapes. Master Thesis. Study Course Hydro Science & Engineering, Technische Universität Dresden, 2014.
  • Marvin Baekisapa: Feasibility Study Regarding the Potential Use of Groundwater for Water Supply on the Solomon Islands. Master Thesis. Technische Universität Dresden, 2013.
  • Raneem Madi: Scenario-based simulation of infiltration at a test site in Ad-Dahna desert in Saudi Arabia. Master Thesis. Technische Universität Dresden & Helmholtz-Zentrum für Umweltforschung Halle, 2012.
  • Bernhard Scheliga: Modellgestützte Untersuchung mariner Salzwasserintrusion in Abhängigkeit der Küstenform. Diplomarbeit. Technische Universität Dresden & Helmholtz-Zentrum für Umweltforschung Leipzig, 2012.
  • Julia Krumm: Model-based Analysis and Prediction of Groundwater Recharge Using LARSIM and HYDRUS-1D. Master Thesis. Technische Universität Dresden & HYDRON GmbH Karlsruhe, 2011.
  • Laura Kruschwitz: Untersuchungen zum Auswaschungsverhalten von NaCl aus dem wassergesättigtem Sedimentporenraum. Bachelor-Arbeit. Technische Universität Dresden, 2011.
  • Hannes Kühlcke: Numerische Modellierung und Grundwasserbilanzierung in einer landwirtschaftlich genutzten Küstenregion im nördlichen Oman. Diplomarbeit. Dresden, Technische Universität Dresden & Helmholtz-Zentrum für Umweltforschung Leipzig, 2011.
  • Anne-Katrin Röseler: Gestaltung von Wasserhaushaltsschichten zur Reduzierung der Grundwasserneubildung auf Kippenflächen am Beispiel eines Pilotversuchs auf der Kippe Witznitz. Diplomarbeit. TU Dresden & Dresdner Grundwasserforschungszentrum. Dresden, 2011.
  • Oliver Männicke: An Experimental Study of Stable Saltwater Upconing. Diplomarbeit. TU Dresden & Flinders University Australia. Dresden, 2010.
  • Martin Seidel: Assessment of Large-scale Interaction Between Groundwater and the Gambia River for an Integrated Water Resources Management (IWRM). Diplomarbeit. TU Dresden. Dresden, 2010.
  • Len v. Scherenberg: Assessment of the Risk of Saline Intrusion into the Gateway Wellfield, Hermanus, Western Cape, South Africa - The application of analytical approaches and density dependent flow modelling in a fractured rock environment. Diplomarbeit. TU Dresden & Umvoto Africa. Dresden, 2010.

► Research

Topics of Interest
  • Water in (semi-)arid regions
  • Groundwater quantity and quality in coastal areas
  • Numerical modeling in the saturated and unsaturated zone
  • Simulation of groundwater flow and transport processes
  • Density driven and variable viscosity flow in porous media
  • Parameterization, interpolation and mesh generation in concurrence with hydro-geological structuring
Project Participation
01/2009 - 08/2013 International Water Research Alliance Saxony (IWAS)
Groundwater modeling in coastal arid regions (MOD3)
09/2013 - 09/2015 ANGUS+: Impacts of the use of the geological subsurface for energy storage in the form of gas and heat in the context of a transition to renewable energy sources 

12/2016 -
12/2018

Urban Catchments: subproject leader on work package Groundwater
02/2018 -
ongoing
ESTIMATE: Principle investigator in DFG-funded project about the relevance of contaminant source zone geometries
07/2018 -
ongoing
MARZIPAN: Principle investigator in DFG-funded project about the determination of the impact of subsurface heterogeneity on vegetation zonation patterns
01/2019 -
ongoing
INCIDENT: Principle investigator in DFG-funded project about the derivation of optimal groundwater monitoring locations based on sewer network properties in urban areas
Reviewed Publications

Recent publications

  • Jurado, A., Walther, M., Díaz-Cruz, M.S., 2019. Occurrence, fate and environmental risk assessment of the organic microcontaminants included in the Watch Lists set by EU Decisions 2015/495 and 2018/840 in the groundwater of Spain. Science of The Total Environment 663, 285–296. https://doi.org/10.1016/j.scitotenv.2019.01.270

  • Yu, L., Wu, X., Zheng, X., Zheng, T., Xin, J., Walther, M., 2019. An index system constructed for ecological stress assessment of the coastal zone: A case study of Shandong, China. J. Environ. Manage. 232, 499–504. https://doi.org/10.1016/j.jenvman.2018.11.084

  • Zinner, M., Rink, K., Jäkel, R., Feldhoff, K., Grunzke, R., Fischer, T., Song, R., Walther, M., Jejkal, T., Kolditz, O., Nagel, W.E., 2018. Revision Control and Automatic Documentation for the Development Numerical Models for Scientific Applications. Int. J. Adv. Softw. 11, 214–226.

Full publication list

Please consult the Research Information System of the Technische Universität Dresden for a list of publications:
https://forschungsinfo.tu-dresden.de/suche?type=pub&dfP=1084

Contributions to Conferences / Proceedings

Talks

  • Walther, M. (2018). Der Weg zur Juniorprofessur. In: HyWaTa - Hydrologisch-Wasserwirtschaftliche Tagung. Dresden, Germany.
  • Walther, M., Händel, F., Kalbacher, T. (2018). Hydrogeologische Modellierung - schön, aber falsch. In: KGM-MODREG: Tagung Für Numerische Modellierung von Wasserfluss, Stofftransport Und Wärmeverlagerung in Seichtliegenden Grundwasserleitern – Praktische Umsetzung Bei Regionaler Betrachtung. Seggauberg, Austria.
  • Walther, M., Stoeckl, L., Morgan, L. (2018). Is sea water intrusion by groundwater over-abstraction even worse than what we expected? Part 2: Understanding parameter sensitivity in field-scale. In: Saltwater Intrusion Meeting 2018, Dansk, Poland.
  • Walther, M., Graf, T., Kolditz, O., Liedl, R., and Post, V. (2017). How Significant is the Slope of the Sea-side Boundary for Modelling Seawater Intrusion in Coastal Aquifers? In: European Geophysical Union General Assembly, Vienna
  • Walther, M., 2016. Variable-Density Flow and transport in Porous Media - A Small Selection of Examples, In: Forstkolloquium. Tharandt, Germany.

  • Walther, M., Händel, F., 2016. Variable density flow and transport in Saturated Porous Media, In: The Indian Institute of Technology. New Dehli, India.

  • Walther, M. (2015). Variable-Density Flow Processes in Porous Media on Small, Medium and Regional Scales. In: Dresdner Grundwassertage 2015, Dresden, Germany.
  • Walther, M., Bilke, L., Delfs, J.-O., Graf, T., Grundmann, J., Liedl, R., Kolditz, O. (2014). Evaluating Remediation Potential of a Salinized Heterogeneous Aquifer System Using Three-Dimensional, Density-Dependent Groundwater Modeling. In: Salt Water Intrusion Meeting (SWIM23), Husum, Germany, 2014.
  • Stoeckl, L., Walther, M., Schneider, A., Yang, J., Graf, T.: Influence of geological heterogeneity on freshwater discharge in coastal aquifers – physical experiments and numerical modeling. In: Salt Water Intrusion Meeting (SWIM23), Husum, Germany, 2014.
  • Walther, M., Bilke, L., Delfs, J.-O., Graf, T., Grundmann, J., Kolditz, O., Liedl, R.: Visualizing Saline Intrusion in a Three-Dimensional, Heterogeneous, Coastal Aquifer. In: Workshop on Visualisation in Environmental Sciences (EnvirVis), Leipzig, Germany, 2013.
  • Walther, M., Graf, T., Kolditz, O., Liedl, R.: Discretizing a Thermohaline Double-Diffusive Rayleigh Regime. In: 3rd HydroGeoSphere Conference, Neuchatel, Switzerland, 2013.
  • Walther, M., Delfs, J.-O., Graf, T., Al-Saidi, A., Grundmann, J., Kolditz, O., Liedl, R.: Case Study of Groundwater Resources Usage for a Coastal Arid Region in the Al Batinah, Oman. In: Hydrogeology of Arid Environments, Hannover, Germany, 2012.
  • Walther, M., Seegert, J., Grundmann, J., Kloss, S., Schütze, N., Gerner, A., Lennartz, F., Schmitz, G., Kolditz, O., Liedl, R.: IWAS – International Water Research Alliance Saxony, Water Resources Management for Hydrologically Sensitive Regions. In: SHARP Sustainable Hydro Assessment & Groundwater Recharge Projects, 4th Partner Meeting Wroclaw/Dresden, POL/DE, 2011.
  • Walther, M.; Kolditz, O.; Grundmann, J.; Liedl, R.: Large-scale Density-dependent Groundwater Modelling in Agriculturally Used Coastal Arid Regions. In: FEMTEC 2011, 3rd International Conference on Computational Methods in Engineering and Science, South Lake Tahoe 2011.
  • Walther, M.; Kolditz, O.; Grundmann, J.; Liedl, R.: Grundwassermodellierung in küstennahen ariden Gebieten unter dem Einfluss der Intrusion marinen Salzwassers. In: Tagung der FH-DGG Tübingen 2010.
  • Walther, M., Fank, J., Reimann, Th., Liedl, R.: Beprobung und Überwachung des gesamten Bereiches der ungesättigten und gesättigten Zone einschließlich des Kapillarsaums - Funktionsanalyse eines Probenahmesystems auf Basis numerischer Simulationen und zweijähriger Datenbasis. In: Forum Junge Hydrogeologen, Tagung der FH-DGG Tübingen 2010.
  • Walther, M.; Kolditz, O.; Grundmann, J.; Liedl, R.: Groundwater Modeling in Coastal Arid Regions Under the Influence of Marine Saltwater Intrusion. In: EGU General Assembly 2010, held 2-7 May, 2010 in Vienna, Austria, p.12790.
  • Walther, M., Fank, J., Reimann, Th., Liedl, R.: Messsystem zur Beprobung und Überwachung des gesamten Bereiches der ungesättigten und ges. Zone. In: 13. Gumpensteiner Lysimetertagung Raumberg-Gumpenstein - Bericht, Irdning 2009.

Posters

  • Magri, F., Walther, M., Inbar, N., Moeller, P., Raggad, M., Roediger, T., Rosenthal, E., Shentsis, I., Siebert, C., Volpi, G.: 3D Coupled Thermal-Hydraulic Model of the Lower Yarmouk Gorge, Jordan Rift Valley. In: American Geological Union Fall Meeting 2017, New Orleans, LA, USA.
  • Peters, R., Walther, M., and Berger, U. (2016). Coastal Hydrology # Ecosystems, An Obviously Linked Network. In Synthesis II Workshop From Dynamics Of Structure To Functions Of Complex Networks, Dresden, Germany.
  • Walther, M., Stöckl, L., Heiss, J., Post, V., Graf, T., Kolditz, O., and Liedl, R. (2016). Numerical Simulation Of Submarine Groundwater Discharge Different Problems On Different Scales (As Usual). In DFG Rundgespräch Submariner Grundwasserabfluss, Delmenhorst, Germany.
  • D. Naumov, T. Fischer, N. Böttcher, N. Watanabe, M. Walther, K. Rink, L. Bilke, H. Shao, O. Kolditz: OpenGeoSys: Performance-Oriented Computational Methods for Numerical Modeling of Flow in Large Hydrogeological Systems. In: American Geological Union Fall Meeting 2014, San Francisco, CA, USA.
  • Walther, M., Solpuker, U., Böttcher, N. Kolditz, O., Liedl, R., Schwartz, FW.: Description and Verification of a Novel Flow and Transport Model for Silicate-Gel Emplacement (H13B-1324). In: AGU Fall Meeting 2013, San Francisco, CA, USA.
  • Graf, T., Walther, M., Kolditz, O., Liedl, R.: Delineating Thermohaline Double-Diffusive Rayleigh Regimes (H13D-1378). In: AGU Fall Meeting 2013, San Francisco, CA, USA.
  • Stoeckl, L., Walther, M., Schneider, A., Yang, J., Gaj, M., Graf, T.: Comparison of different numerical models using a two-dimensional density-driven benchmark of a freshwater lens (H33B-1349). In: AGU Fall Meeting 2013, San Francisco, CA, USA.
  • Delfs, J.-O., Sachse, A., Gayler, S., Grathwohl, P., He, W., Jang, E., Kalbacher, T., Klein, C., Kolditz, O., Maier, U., Priesack, E., Rink, K., Selle, B., Shao, H., Singh, AK., Streck, T., Sun, Y., Wang, W., Walther, M.: An Open Source Framework for Coupled Hydro-Hydrogeo-Chemical Systems in Catchment Research (H43A-1414). In: AGU Fall Meeting 2013, San Francisco, CA, USA.
  • Walther, M., Delfs, J.-O., Grundmann, J., Kolditz, O., Liedl, R.: Dichteabhängige Grundwassermodellierung auf Regionalskala: Modellstudie für eine landwirtschaftliche Küstenregion in der Al Batinah, Oman. In: FH‐DGG‐Tagung, Dresden, Germany, 2012.
  • Philipp, A., Grundmann, J., Walther, M.: Flow Routing in Ephemeral Arid Rivers under the Influence of Transmission Losses and Groundwater Recharge Dams. In: Hydrogeology of Arid Environments, Hannover, Germany, 2012.
  • Walther, M., Delfs, J.-O., Grundmann, J., Kolditz, O., Liedl, R.: Density-Dependent Saltwater Intrusion Modeling within an Integrated Water Resource Management for an Agricultural Used Coastal Arid Study Region in Oman. In: International Conference on Integrated Water Resources Management, Management of Water in a Changing World: Lessons Learnt and Innovative Perspectives, Dresden 2011.
  • Walther, M., Delfs, J.-O., Grundmann, J., Kolditz, O., Liedl, R.: An Application of the Scientific Simulation Software OpenGeoSys: Three-Dimensional Density-Dependent Groundwater Modeling in Coastal Arid Regions. In: ModelCare 2011 Conference »Models – Repositories of Knowledge« Leipzig 2011.
  • Walther, M., Fank, J., Reimann, Th., Liedl, R.: Beprobung und Überwachung des gesamten Bereiches der ungesättigten und gesättigten Zone einschließlich des Kapillarsaums - Funktionsanalyse eines Probenahmesystems auf Basis numerischer Simulationen und zweijähriger Datenbasis. In: Tagung der FH-DGG Tübingen 2010.

Proceedings

  • Walther, M., Bilke, L., Delfs, J.-O., Graf, T., Grundmann, J., Liedl, R., Kolditz, O. (2014). Evaluating Remediation Potential of a Salinized Heterogeneous Aquifer System Using Three-Dimensional, Density-Dependent Groundwater Modeling. In: Salt Water Intrusion Meeting (SWIM23), Husum, Germany, 2014.
  • Stoeckl, L., Walther, M., Schneider, A., Yang, J., Graf, T.: Influence of geological heterogeneity on freshwater discharge in coastal aquifers – physical experiments and numerical modeling. In: Salt Water Intrusion Meeting (SWIM23), Husum, Germany, 2014.
  • Walther, M., Bilke, L., Delfs, J.-O., Graf, T., Grundmann, J., Kolditz, O., Liedl, R.: Visualizing Saline Intrusion in a Three-Dimensional, Heterogeneous, Coastal Aquifer. In: Workshop on Visualisation in Environmental Sciences (EnvirVis), Leipzig, Germany, 2013.
  • Brettschneider, M., Grundmann, J., Schütze, N., Walther, M.: Development of Surrogate Models for reproduction of complex numerical simulation models and application in a water resource management system. In: The New Zealand Hydrological Society Annual Conference (NZHS Conference) at Dunedin (New Zealand) 2010.
  • Schmitz G., Al-Hattaly S., Grundmann J., Schütze N., Walther, M.: An Integrated Assessment-, Prognoses-, Planning- and Managementtool (APPM) for Sustainable Arid Zone Water Management. In: 9th Gulf Water Conference 2010, Muscat, Oman.
  • Fank, J., Walther, M., Reimann, Th., Liedl, R.: Tiefengestaffeltes Wasserprobenahmesystem unter ackerbaulich genutzten Flächen. In: PANGEO 2008 - Abstracts / Kurzfassungen: Journal of Alpine Geology, 49: 22-23, Wien 2008.
Journal Reviewer & Memberships

Reviewing for Advances in Water Resources (ADWR), Journal of Hydrology (JoH), Hydrology and Earth System Sciences (HESS), Environmental Earth Sciences (EES), Hydrogeology Journal, Grundwasser.

Regular member and member of the advisory board of the Fachsektion Hydrogeologie e.V. in der Deutschen Geologischen Gesellschaft (FH-DGGV e.V.), regular member of the International Association of Hydrogeologists (IAH), member of the Freunde und Förderer der Technischen Universität Dresden e.V., member of the Freunde und Förderer des UFZ e.V.

► Projects

MARZIPAN

DFG funded CAWR-Project (TUD Chair of Forest Biometrics and Forest Systems Analysis, UFZ Department Environmental Informatics) to gain information on subsurface aquifer structures from surface vegetation patterns

Project runtime: 07/2018 - 06/2021

Typical mangrove zonation patterns hypothetically influenced by subsurface properties Typical mangrove zonation patterns hypothetically influenced by subsurface properties

Typical mangrove zonation patterns hypothetically influenced by subsurface properties

Typical mangrove zonation patterns hypothetically influenced by subsurface properties

Typical mangrove zonation patterns hypothetically influenced by subsurface properties

Rationale:

  • Traditional forest models do not consider below-ground processes of plant competition for limited resources
  • Aquifer parameterization is limited to point information on larger scales

Aims:

  • Gain insight into the relationships between visible vegetation patterns like tree allometry, species composition and zonation and subsurface aquifer structures and potential gradients by tidal and groundwater
  • Understand the physical mechanisms of belowground plant interaction and derive a new plant interaction approach for individual based simulation models
  • Adopt vegetation zonation patterns to gain information on subsurface aquifer structures and parameterization
ESTIMATE

DFG funded CAWR-Project (TUD Institute for Groundwater Management, Professorships Groundwater Management & Contaminant Hydrology; UFZ Department Monitoring and Exploration Technologies) to understand influence of internal and external stressors on contaminant source zone formation and their implications for final plume extension

Project runtime: 03/2018 - 02/2021

Source Zone Formation Source Zone Formation

Source Zone Formation

Source Zone Formation

Source Zone Formation

Rationale:

  • DNAPL source zone formation largely unknown in detail, usually approximated as point or line source in numerical models 
  • Compensation of uncertainty through calibration in plume length

Aims:

  • Understand influences of temporal dynamics (e.g. recharge) and spatial heterogeneity (deterministic, e.g. layering) during source zone formation 
  • Derive effective source zone geometries based on major site specifics
Urban Catchments: Chaohu
Result of conservative tracer simulation in Lake Chao catchment area © Martin Pohl Result of conservative tracer simulation in Lake Chao catchment area © Martin Pohl
Result of conservative tracer simulation in Lake Chao catchment area

© Martin Pohl

Subproject in BMBF-funded project: Urban Catchments

Runtime 12/2016 - 12/2018

INCIDENT

DFG funded CAWR-Project (TUD Chair of Groundwater ManagementTUD Chair of Urban Water Management, UFZ Department Monitoring and Exploration Technologies) to deduct optimal groundwater monitoring strategies from sewer structure characteristics

Project runtime: 01/2019 - 12/2021

Sewer network structure, sewer leakage, aquifer contamination & monitoring © C. Engelmann Sewer network structure, sewer leakage, aquifer contamination & monitoring © C. Engelmann

Sewer network structure, sewer leakage, aquifer contamination & monitoring

Sewer network structure, sewer leakage, aquifer contamination & monitoring

Sewer network structure, sewer leakage, aquifer contamination & monitoring © C. Engelmann

Rationale:

  • Determination of sewer leakage required to secure groundwater quality; urban groundwater monitoring capabilities limited by space and money

  • Multiple point-type, long-term sewer leackage represents linear-type source term of contaminants at groundwater surface

Aims:

  • Understand spatial relation between point-type pipe leakage and linear-type groundwater contamination

  • Characterize sewer network structures with geometric measures (network parameters)

  • Determine aquifer areas of highest contamination potential with respect to different sewer network types (and network parameters)

  • Deduct optimal / optimize existing groundwater monitoring system based on sewer network structure

Please find more specific information on all projects through the Research Information System of the Technische Universität Dresden: https://forschungsinfo.tu-dresden.de/suche?type=fp&dfP=1084

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Marc Walther
Letzte Änderung: 08.03.2019