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      Water analysis Conducting and evaluating physical-chemical and microbiological water testing in accordance with German Drinking Water Ordinance and other regulations.
    • Test centre and product testing
      Testing of products and devices Initial testing of products and materials in contact with drinking water. The test centre is accredited for more than 200 product standards.
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      Treatment technologies Develop sustainable water supply concepts. Implement, monitor and optimise new technologies. Test and further develop existing treatment methods.
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      Micropollutants and microorganisms Development and improvement of determination procedures. Investigating occurrence, behaviour and fate of inorganic and organic trace substances.
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      Network management and drinking water installation Advice on safeguarding the quality of drinking water in the distribution system, support in the development of specific network management strategies.
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      Risk management Supporting water supply companies in setting up continuous risk management for water supply facilities, based on our comprehensive expertise.
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      Drinking water catchments and resources Protection of drinking water resources by assessing potential hazards in water catchment areas, catalogues of measures, monitoring concepts, databases.
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      Environmental biotechnology and contaminated sites Environmental biotechnology to improve water quality. Degradation processes for water purification. Concepts and studies for pollutant contamination.
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      Digitalisation Solving complex questions and problems of water supply companies in digitalisation through technical support or practical research projects.
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      Practical projects Research and practice, water supply, scientific and technical expertise, technology concepts, resource protection, distribution network, digitalisation.
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      Resource protection Sustainable resource protection as an important factor for safe drinking water supply, management of hazards and risks in water catchment areas.
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      Environmental biotechnology Technical and biological methods for the elimination of microorganisms, microbiological degradation processes, risk assessment of microbial contamination.
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      Microorganisms Application and development of reliable detection methods for microorganisms in drinking water, evaluation of disinfection and treatment measures.
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      Micropollutants Reliable and sensitive determination of trace substances and microplastics, investigation of the behaviour in the water cycle, qualified risk assessment.
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      Waste water and water cycle Development of integrated water supply and waste water disposal concepts, Utilisation of biodegradation processes to eliminate persistent substances.
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      New technologies and products Technologies and products for the treatment, disinfection and post-treatment of drinking water, testing for performance, safety and robustness.
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      Asset management and infrastructure Development of asset management strategies to ensure a stable supply of high-quality drinking water, assessment of the condition of pipeline networks.
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      Digitalisation and Management Digitalisation in the areas of data collection, data management, data-driven applications and AI for the water supply.
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  • Drinking water catchments and resources

Management of drinking water catchments and resources

Monitoring raw water resources helps to ensure the long-term protection of drinking water quality. We identify and assess potential hazards resulting from climate change, land use, and construction activities in catchment areas, and derive targeted recommendations for mitigation measures in order to protect (ground)water resources and ensure water supply. This includes conducting area- and issue-specific monitoring programs and the optimisation of measurement networks. We work closely with the relevant water suppliers, authorities, and other stakeholders to ensure effective implementation.

In-depth understanding of hydro-chemical processes and knowledge of site characteristics in catchment areas contribute to a thorough understanding of entry pathways of pollutants, trace substances, and microorganisms. These insights are essential for the sustainable management and protection of raw water resources. 

Furthermore, TZW operates databases on groundwater and raw water quality. Data management, visualisation, and analysis are increasingly automated, using statistical methods and artificial intelligence (AI). These quality-assured datasets on groundwater and raw water quality facilitate the sustainable monitoring of raw water resources, thereby contributing in the long term to the safety of drinking water supply.

What do we offer?

Resource Protection, Monitoring, Management of Water Protection Areas

  • Site inspections, analysis of chemical and microbiological contamination sources, assessment of hygiene risks in the water extraction environment.
  • Concepts for groundwater monitoring and optimization of measurement networks
  • Assessment of construction projects in drinking water protection areas, construction monitoring, and evidence documentation.
  • Sustainable farming methods, support in the development of remediation plans to reduce nitrate leaching.
  • Assisting water service supply companies in questions regarding biogas plants, energy crop cultivation, and application of digestates.

Resilience, Criticality

  • Resilience analysis, e.g. according to DVGW W 1003 (A)
  • Climate change mitigation measures
  • Water demand forecasts, analyses regarding demand coverage and resource availability 
  • Examining how reliable the supply situations are, assessing the rate at which replacement supply can be provided, and identifying options to enhance resilience.
  • Vulnerability analysis (sensitivity to contamination) of groundwater in drinking water catchments.
  • Statements on land use conflicts in water protection areas.
  • Risk management for water supply facilities covering the entire supply chain, from the abstraction point to the consumer

Water Abstraction, Water Demand, Water Rights, Supply Structures

  • Inspections of water protection zones acc. to § 27 of the German Drinking Water Ordinance
  • Assessment of water abstraction facilities (wells, springs) and environments
  • Scientific assistance for pump and recovery tests
  • Assistance in procedures to create or adapt water protection areas, support in applying for water rights
  • Concepts for water abstraction, structural concepts for the supply system.
  • Concepts for Managed Aquifer Recharge (MAR)
  • Site proposals for new possibilities of drinking water extraction

Geospatial Data Management & Geographic Information Systems (GIS)

  • Visualisation of geodata, e.g., maps of groundwater iso-levels and groundwater flow, concentration distributions
  • Groundwater modelling
  • Databases on water protection with web portal
  • Digitalisation, AI, Python scripts for data analysis, plausibility checks of measured values, and scientific analyses
  • Management of hydrological and hydro-chemical data, data analysis and visualisation, statistical methods (Data Science)
  • Analysis of remote sensing data (e.g., climate and weather data, land use, surface temperature)
Methods and equipment

Data Analysis and Scientific Evaluations

  • Databases
    • Development and operation of flexibly scalable databases
    • Operation of supra-regional databases on water protection with web portals
    • Combination with GIS for display and analysis of spatial data
  • Numerical modelling of flow, substance transport, and heat transport
  • Spatial data analyses using Geographic Information Systems (GIS), including GIS models and scripts for processing large datasets
  • Statistical analyses (Python, R, MS Excel)
  • INVAM (model for calculation of nitrate leaching)

Practical Methods (field + laboratory)

  • Groundwater and leachate sampling
  • Analysis of physico-chemical parameters, incl. nitrate
  • Infiltration measurements (double-ring infiltrometer)
  • Movement of substances in the field (field lysimeters) and laboratory (laboratory lysimeters)
  • Water table measurements (point measurements or continuous measurements via data loggers)
  • Soil sampling, analysis of nitrate and ammonium, determination of water content.
  • Mapping of agricultural land use using GPS
Information and Links

Flyer – nitrate pollution / water protection and agricultural land use services (in German)
Flyer - Risikomanagement in Einzugsgebieten - Neue Anforderungen und Lösungen (in German)

 

Groundwater database Baden-Württemberg water supply
Online portal of the RWDB (raw water database) and GWDB (groundwater database) for nitrate
Quick guide to the online portal

Publications

Müller, B. M.;Sturm, S.; Vollmer, T.; Riede, P.; aus der Beek, T.; Zaun, F.; Löhner, H.; Zintgraf, S.; Welsch, H.; Kulaczewski, O. (2026): ResilJetzt! – Resilienz in der Wasserversorgung. energie | wasser-praxis 02/2026.

 

Kaspryk, O.; Xanke, J.; Ball, T. (2025): Volumenabschätzung PFAS-belastetes Grundwasser im Landkreis Rastatt und im Stadtkreis Baden-Baden. In: Grundwasserdatenbank Wasserversorgung: 33. Jahresbericht. Sonderbeitrag. 

 

Müller, B. M.; Vollmer, T.; Riede, P.; Schütze, L.; Sturm, S.; Zaun, F.; aus der Beek, T. (2025): Wasserversorgungskonzepte der Bundesländer. energie | wasser-praxis 01/2025.

 

Muhrez, R.; Sturm, S. (2024): Belastung der Rohwasserressourcen für die Trinkwasserversorgung in Baden-Württemberg mit ausgewählten Parametern von Pflanzenschutzmitteln. In: Grundwasserdatenbank Wasserversorgung: 32. Jahresbericht. Sonderbeitrag. S. 2-16.

 

Fischer, T.; Snjaric, E.; Sturm, S. (2024): Wissenschaftlich-fachliche Konzeption eines Ansatzes zur Umsetzung der Trinkwassereinzugsgebieteverordnung (TrinkwEGV) in Baden-Württemberg In: Grundwasserdatenbank Wasserversorgung: 32. Jahresbericht. Sonderbeitrag. S. 17-31.

 

Xanke, J.; Stevanovic, Z.; Liesch, T.; Kaltenbrunn, A.; Ravbar, N.; Jourde, H.; Barberá, J. A,; Andreo, B: (2024) Flooding and flood water storage in karst systems of the Mediterranean region. Hydrogeol J. https://doi.org/10.1007/s10040-024-02811-0. 

 

Snjaric, E.; Bauer, J.; Fischer, T.; Sturm, S. (2023): Pflanzenschutzmittel in Wasserschutzgebieten in Baden-Württemberg: Wie empfindlich sind unsere Grundwasservorkommen?. In: Grundwasserdatenbank Wasserversorgung: 31. Jahresbericht. Sonderbeitrag. S. 2-31.

 

Sturm, S.; Freeling, F.; Brauer, F.; Vollmer, T.; aus der Beek, T.; Karges, U.: Trifluoracetat (TFA): Grundlagen für eine effektive Minimierung schaffen - Räumliche Analyse der Eintragspfade in den Wasserkreislauf. Incl. StoryMap und Interaktive Karte. https://www.umweltbundesamt.de/publikationen/trifluoracetat-tfa-grundlagen-fuer-eine-effektive; Interaktive TFA-Karte; TFA-Story Map.

 

Bauer, J.; Fischer, T.;Muhrez, R.; Sturm, S. (2022): Langzeittrends der Grundwasserbeschaffenheit – ausgewählte Beispiele aus dem Grundmessprogramm. In: Grundwasserdatenbank Wasserversorgung: 30. Jahresbericht. Sonderbeitrag: 30 Jahre Grundwasserdatenbank Wasserversorgung in Baden-Württemberg. S. 9-28.

 

Sturm, S.; Muhrez, R. (2021): Zusammenhang von Landnutzung und Nitratkonzentration im Grundwasser in Baden-Württemberg. In: Grundwasserdatenbank Wasserversorgung: 29. Jahresbericht. Sonderbeitrag. S. 17-24.

 

Riegel, M. (2019): Kritikalitätsanalyse für Objekte der Trinkwasserversorgung. In: Zukunftsthemen der Wasserversorgung. Veröffentlichungen aus dem Technologiezentrum Wasser 90, ISSN 1434-5765, 117-133. Identifizierung kritischer Infrastrukturen in der Wasserversorgung (KRITISGIS-T); Projekt im Auftrag des Bundesamts für Bevölkerungsschutz und Katastrophenhilfe (BBK); (2017 – 2020).

 

Lange, F. T.; Sturm, S.; Müller, J.; Richter, D.; Brauer, F.; Fischer, T.; Nödler, K.; Armbruster, D.; Rink, M. (2018): Minimierungsstrategie für den PSM-Metaboliten-Eintrag ins Grundwasser. Veröffentlichungen aus dem Technologiezentrum Wasser 84, ISSN 1434-5765.

 

Lorenz, J.; Kiefer, J.; Fischer, T. (2017): Die Grundwasserdatenbank Wasserversorgung Baden-Württemberg – ein Beitrag zum Trinkwasser-Ressourcenschutz. In: Risiken in der Wasserversorgung. Stuttgarter Berichte zur Siedlungswasserwirtschaft., Bd. 235, 61-77.

 

Ball T., Geiges, M. (2017): Untersuchungen zum Nitratgehalt des Bodens unter durchwachsener Silphie an vier Standorten. Kurzstudie im Auftrag des BDEW (Bundesverband der Energie- und Wasserwirtschaft e.V.), Berlin, Karlsruhe. https://www.bdew.de/media/documents/20170731_Silphie-Untersuchung_Ayvl5QR.pdf.

 

Sturm S., Fischer T., Kiefer J, Remmler F., Borgmann A. (2016): Entwicklung eines Datenbankbasierten Systems zur Gefährdungsanalyse in Wassereinzugsgebieten (DBBS). S. 13-24. In: TZW (DVGW-Technologiezentrum Wasser, Karlsruhe; Hrsg., 2016): Präventives Risikomanagement in der Trinkwasserversorgung. Abschlussbericht zum BMBF-Forschungsvorhaben PRiMaT (Fkz. 02WRS1279A bis 02WRS1279, Veröffentlichungen aus dem Technologiezentrum Wasser, 74, ISSN: 1434-5765

 

Kiefer, J.; Geiges, M. (2016): Reduzierung der PSM-Belastung bei ausgewählten Rohwasserressourcen – Eine Initiative der DVGW-Landesgruppe Baden-Württemberg. Grundwasserdatenbank Wasserversorgung. Sonderbeiträge zum 24. Jahresbericht.  http://www.grundwasserdatenbank.de/

 

Sturm, S.; Kiefer, J. (2016): Grundwasserschutz und Infrastrukturentwicklungen - Flächenkonkurrenz in Wasserschutzgebieten. In: Veröffentlichungen aus dem DVGW-Technologiezentrum Wasser Karlsruhe (TZW) (75), 1-28. 

 

DVGW-Landesgruppe Baden-Württemberg [Hg.]; Zigelli, N.; Kiefer, J.; Sturm, S. (2016): Überwachung von Wasserschutzgebieten in Baden-Württemberg. Handlungsorientierung für Wasserversorger. 

 

Stauder, S.; Brauer, F.; Hochmuth, D.; Fischer, T.; Morhard, A. (2015): Vulnerabilitätsanalyse von Wasserversorgungsunternehmen im südlichen Schwarzwald hinsichtlich des Klimawandels. https://pd.lubw.de/25900

 

Erler R.; Ball T.; Kiefer J.; Dresen B.; Köppel W. (2013): Nachhaltige Biogasbereitstellung in Deutschland.DVGW energie|wasser-praxis 04/2013, 84-87.

 

Kiefer J., Ball T., Rhode K., Selz M., Schrempp S., Müller-Sämann K. (2013): Entwicklung einer neuen Strategie zur Emissions- und Erfolgskontrolle im Grundwasserschutz. 44. AWBR-Jahresbericht 2012; AWBR.

 

Ausgewählte Projekte:

Multi-sektorale Wasserbedarfsszenarien für Deutschland und Abschätzung zukünftiger Regionen mit steigender Wasserknappheit (WatDEMAND). DVGW, Laufzeit: 12. 2021 – 09.2023, in Zusammenarbeit mit IWW Zentrum Wasser und Universität Hohenheim.

 

Konfliktpotenzialanalyse und Handlungsoptionen für landwirtschaftliche Bewässerung und öffentliche Trinkwasserversorgung (VERTIKAL). DVGW, Laufzeit: 01.2022 - 01.2023, in Zusammenarbeit mit IWW Zentrum Wasser.

 

NITRAT-MONITORING 4.0 (NIMO): Intelligente Systeme zur nachhaltigen Reduzierung von Nitrat im Grundwasser. Forschungsprojekt im Auftrag des Bundesministeriums für Umwelt, Naturschutz und nukleare Sicherheit (BMU), Laufzeit 2020 - 2023, in Zusammenarbeit mit Disy Informationssysteme GmbH, Karlsruher Institut für Technologie, Institut für Angewandte Geowissenschaften, Fraunhofer-Institut für Optronik, Systemtechnik und Bildauswertung.

 

RWDB: Aufbau und Betrieb der Rohwasserdatenbank Wasserversorgung Deutschland. 

 

RiQO: Risikobewertung der Auswirkungen von Extremereignissen auf die Wasserqualität von Oberflächengewässern. Baden-Württemberg-Stiftung. Laufzeit 09.2023-08.2026.

 

TrinkXtrem: Anpassungsstrategien der öffentlichen Trinkwasserversorgung an Extremereignisse. BMBF-Projekt, Infos unter: https://www.trinkxtrem.de/

 

KreATiw: Klimaresilienz, Abwassersicherheit und Trinkwassersicherheit. BMBF-Projekt, Laufzeit:  12.2021-02.2023, in Zusammenarbeit mit Umweltbundesamt (UBA) und Emanti Management.

 

Volumes from the TZW publication series can be purchased here.

Contact

Dipl.-Geoökol. Sebastian Sturm +49 721 9678-200 Send email
 
Dipl.-Hydrol. Matthias Geiges +49 721 9678-282 Send email
Dr. Cordula Witzig +49 721 9678-185 Send email

Projects

3D Icon computer, data, digital
Finding the ideal data sources online can be challenging. Source: Pixabay - Merhan Saeed
07.10.2024
How to integrate climate aspects into risk management (RisTkli)

The amended German Drinking Water Ordinance requires water suppliers to implement risk management, explicitly calling for the consideration of risks…

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Sampling of groundwater
Sampling of groundwater
02.04.2024
Assessment of nitrate contamination in groundwater (ArNO)

The revision of nitrate comtaminated areas (so-called "Rote Gebiete") is currently the subject of debate. In some areas, farmers and water suppliers…

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[Translate to English:]
[Translate to English:]
11.01.2024
Impact of climate change on groundwater availability in Germany (GW-Impact)

To investigate the increasing spatio-temporal variability of groundwater recharge in the future, both locally and regionally, and its specific effects…

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More projects

 

Solutions
  • Water analysis
  • Testing of products and devices
  • Treatment technologies
  • Micropollutants and microorganisms
  • Network management and drinking water installation
  • Risk management
  • Drinking water catchments and resources
  • Environmental biotechnology and contaminated sites
  • Digitalisation
  • Practical projects
Research
  • Resource protection
  • Environmental biotechnology
  • Microorganisms
  • Micropollutants
  • Waste water and water cycle
  • New technologies and products
  • Asset management and infrastructure
  • Digitalisation and Management
About TZW
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  • Organisation
  • Team
  • Locations
  • Partners
Projects
  • Projects
Information
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  • Publications
  • Annual report 2024
  • Videos
  • Press

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