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Helmut Lehn

Dr. Helmut Lehn

Scientific staff until 2019
retired
Research area Sustainability and environment

Institut für Technikfolgenabschätzung und Systemanalyse (ITAS)
Postfach 3640
76021 Karlsruhe


Education

Studies of biology and chemistry at Heidelberg University. Dissertation on the transfer of thallium, cadmium, lead, and zinc from soil to selected crop plants and on the temporal and spacial distribution of metals in plants. 

Professional background

1986 - 1992 Member of scientific staff at a municipal environmental authority in Hesse as well as leader of a laboratory for environmental analysis
1992 - 2004 Member of scientific staff at the Akademie für Technikfolgenabschätzung (academy for technology assessement) in Stuttgart
Fields of work: sustainable resource management (water, soil)

Publications


2018
Friedrich, J.; Poganietz, W.; Lehn, H.; Melkonyan, A.; Withanachchi, S.; Köpke, S.; Ploeger, A.; Krumme, K.
Challenges of the water-energy-food Nexus.
2018. 3rd German Future Earth Summit, Berlin, February 8-9, 2018 
Friedrich, J.; Poganietz, W.-R.; Lehn, H.
Life cycle assessment of the water-energy nexus in the urban building stock: The case of Heidelberg, Germany.
2018. EcoBalance (2018), Tokio, Japan, 9.–12. Oktober 2018 
Steiner, F.; Lehn, H.; Weiss, A.
Sustainability assessment of urban water infrastructure systems with special focus on the urban water-energy nexus.
2018. Expanding Cities – Diminishing Space : Proceedings of the 23rd International Conference on Urban Planning, Regional Development and Information Society, Vienna, A, April 4-6, 2018, 751–762, Competence Center of Urban and Regional Planning, Schwechat, A 
Lehn, H.; Steiner, F.; Friedrich, J.; Araya Valenzuela, D.
The challenge of transforming urban supply and disposal infrastructures to more resonance and energy efficiency.
2018. Proceedings der 23. internationalen Konferenz zu Stadtplanung und Regionalentwicklung in der Informationsgesellschaft (REAL CORP 2018), Wien, A, April 4-6, 2018. Hrsg.: M. Schrenk, 681–688, CORP – Competence Center of Urban and Regional Planning, Wien 
Lehn, H.; Steiner, F.; Friedrich, J.; Araya Valenzuela, D.
The challenge of transforming urban supply and disposal infrastructures to more resonance and energy efficiency.
2018. 23. internationale Konferenz zu Stadtplanung und Regionalentwicklung in der Informationsgesellschaft (REAL CORP 2018), Wien, A, April 4-6, 2018 
2017
Friedrich, J.; Steiner, F.; Weiss, A.; Lehn, H.
Experience different perspectives on the urban water-energy nexus! Introduction.
2017. SIWI World Water Week, Stockholm, S, August 27 - September 1, 2017 
Poganietz, W.-R.; Lehn, H.
Sustainable design of the water-energy-waste nexus in new settlements: the case of Curauma.
2017. 9th biennial conference of the International Society for Industrial Ecology (ISIE) and the 25th annual conference of the International Symposium on Sustainable Systems and Technology (ISSST), Chicago, IL, June 25-29, 2017 
Lehn, H.
El Nexo Energia - Agua en los Contextos Urbanos.
2017. Vortrag anlässlich des Besuchs einer Delegation aus der VIII.Region Chiles, Karlsruhe, 27.April 2017 
Lehn, H.
Research demands in the agricultural water-energy-nexus in North-, Central- and Southern Chile.
2017. Heidelberg Center for Latin America, Santiago de Chile, RCH, 3.Januar 2017 
2016
Lehn, H.; Simon, L. M.
Riesgos actuales y futuros para la gestión sustentable del agua.
2016. Santiago 2030 : Escenarios para la planificación estratégica. Ed. J.R. Barton, 219–242, RIL® editores, Santiago de Chile 
Lehn, H.
El nexo agua-energia en la agricultura bajo el contexto del cambio climatico.
2016. Universidad de La Frontera, Temuco, RCH, 20.Dezember 2016 
Lehn, H.
El nexo agua-energia en la agricultura bajo el contexto del cambio climatico.
2016. Universidad de Chile, Santiago de Chile, RCH, 6.Dezember 2016 
Lehn, H.
Understanding wastewater as a resource.
2016. Gobernanza y Gestion Comunitaria del Agua en los Servicios Sanitarios Rurales, Heidelberg Center for Latin America, Santiago de Chile, RCH, Devember 7, 2016 
Poganietz, W.-R.; Lehn, H.; Vergara Araya, M.; Steiner, K. F.
Separating waste water at the source: Impacts on energy efficiency in decentralized energy systems.
2016. Joint 12th ISIE Socio-Economic Metabolism section Conference and 5th Asia-Pacific Conference, Nagoya, J, September 28-30, 2016 
Weiss, A.; Poganietz, W.-R.; Lehn, H.; Steiner, F.; Böschen, S.
The water energy nexus in the urban context. A suggestion for a multi- inter- and transdisciplinary approach for sustainable development.
2016. Workshop ’Understanding the Water-Energy-Food Nexus and ist Implication for Governance’, Osnabrück, June 15-16, 2016 
Petney, T. N.; Lehn, H.; Khuntikeo, N.; Dolos, K.; Norra, S.; Holbach, A.; Sithithaworn, P.; Andrews, R. H.; Pfäffle, M. P.
Northeast Thailand : new approaches for avoiding water related liver cancer.
2016. Water solutions, 1 (1), 118–123 
2015
Lehn, H.
Waste water: hygienic threat and precious resource.
2015. Vortr.: Khon Kaen University, T, 7.Oktober 2015 
Lehn, H.
How to adapt buildings towards a better resource efficiency.
2015. Encuentros - Chile Global, Rotterdam, NL, July 9, 2015 
Poganietz, W. R.; Fuss, M.; Lehn, H.
Integrating separate flow treatment systems for solid.
2015. Vortr.: Bundesuniversität des Staates Minas Gerais, Belo Horizonte, BR, 24.April 2015 
Stelzer, V.; Lehn, H.
Perspektiven einer urbanen Stromversorgung unter besonderer Berücksichtigung von Megacities.
2015. Vortr.: Inhouse-Schulung der Pfisterer Kontaktsysteme GmbH, Winterbach, 25. März 2015 
Lehn, H.
Nachhaltigkeitsüberlegungen zum Wasser-Energie-Nexus - mit einem Fokus auf die urbane Umwelt.
2015. HCE-Kolloquium ’Heidelberger Brücke’, Heidelberg, 26. Januar 2015 
2014
Lehn, H.
Discovery of waste water as a resource for the metropolitain region of Santiago.
2014. Vortr.: Heidelberg Center, Santiago de Chile, RCH, 28.November 2014 
Lehn, H.
Aspects of sustainable water management in the urban environment.
2014. Vortr.: Green Talents visit KIT, Karlsruhe, 28. Oktober 2014 
Lehn, H.
Virtuelles Wasser.
2014. Vortrag im Rahmen des Seminars ’Zu Tisch! Essen in Zeiten der Nachhaltigkeit’, Karlsruhe, 27. Mai 2014 
Lehn, H.
Developing the energy saving building to more resource efficiency.
2014. 11th International Conference ’Sustainability 2014: Future Urban Development at Different Scales’, Karlsruhe, May 6-9, 2014 
Lehn, H.
Urban resource management with special emphasis on the water - energy - food nexus.
2014. Institute for Water Structure and renewable Energy (IWSrE) International Conference and Workshop, Surakarta, RI, March 27-28, 2014 
Lehn, H.; Lehmann, A.; Nayono, T.; Kopfmüller, J.
Integrative sustainability assessment to support IWRM Indonesia.
2014. 7th Integrated Water Resources Management Workshop (IWRM 2014), Yogyakarta, RI, April 1, 2014 
2013
Krellenberg, K.; Müller, A.; Welz, J.; Bräutigam, K. R.; Kopfmüller, J.; Lehn, H.; Quintero, A.; Oertel, M.; Simon, L.; Stelzer, V.
Material informativo municipal - Lampa.
2013. Leipzig: Helmholtz-Zentrum für Umweltforschung (UFZ) 2013 
Simon, L. M.; Oertel, M.; Lehn, H.
Climate change in central Chile. Challenges for the urban and agricultural sector.
2013. Pfaffenbach, C. [Hrsg.] Global Demographic and Climate Challenges in the City : An Interdisciplinary Assessment of Impacts, Needs and Strategies Aachen : Geographisches Institut der RWTH, 2013 (Aachener Geographische Arbeiten ; 50) 
Lehn, H.
Tecnologias para la reutilizacion del agua en zonas semi aridas.
2013. Vortr.: Universidad de la Frontera, Temuco, RCH, November 18, 2013 
Lehn, H.
Sustainable management of water resources and water services.
2013. Sino-German Conference, Urumqi, China, October 10-12, 2013 
Cuchacovich, J. C.; Lehn, H.
Environmental flows, spaces for colaborative governance.
2013. 1st Congress in Ecohydrology for Latin America and the Caribbean (CELAC-PHI 2013), Santiago de Chile, RCH, November 11-13, 2013 
Lehn, H.; Simon, L. M.; Oertel, M.; Stelzer, V.; Bräutigam, R.; Kopfmüller, J.
Joint management of water and energy resources as a prerequisite for a sustainable development of the metropolitan region of Santiago de Chile.
2013. 1st International Conference of Natural Resources and Development, Vina del Mar, RCH, November 25-28, 2013 
Lehn, H.
Tecnologias para la reutilizacion del agua en zonas semi aridas.
2013. Vortr.: AIDIS (Asociacion Interamericana de Ingeniera Sanitaria y Ambiental), Santiago de Chile, RCH, December 4, 2013 
Lehn, H.
Wasser- Was tun für einen nachhaltigeren Umgang?.
2013. Vortrag am Lions Club Walldorf, 5. Juni 2013 
Lüthi, C.; Lehn, H.; Norström, A.; Panesar, A.; Rüd, S.; Saywell, D.; Verhagen, J.; Ulrich, L.; Ingle, R.
Planning of sustainable sanitation for cities.
2013. Compilation of 13 Factsheets on Key Sustainable Sanitation Topics Sustainable Sanitation Alliance, 2013 
2012
Krellenberg, K.; Müller, A.; Welz, J.; Nagel, J.; Bräutigam, K. R.; Kopfmüller, J.; Lehn, H.; Quintero, A.; Oertel, M.; Simon, L.; Stelzer, V.
Clima Adapatacion Santiago.
2012. Leipzig: Helmholtz.Zentrum für Umweltforschung (UFZ) 2012 
Krellenberg, K.; Müller, A.; Welz, J.; Bräutigam, K. R.; Kopfmüller, J.; Lehn, H.; Oertel, M.; Simon, L.; Stelzer, V.; Quintero, A.
Material informativo municipal - Pedro Aguirre Cerda.
2012. Leipzig: Helmholtz-Zentrum für Umweltforschung (UFZ) 2012 
Krellenberg, K.; Müller, A.; Welz, J.; Bräutigam, K. R.; Kopfmüller, J.; Lehn, H.; Oertel, M.; Simon, L.; Stelzer, V.; Quintero, A.
Material informativo municipal - La Florida.
2012. Leipzig: Helmholtz-Zentrum für Umweltforschung (UFZ) 2012 
Krellenberg, K.; Barth, K.; Barton, J.; Harris, J.; Hansjürgens, B.; Robles, R.; Soto, J. R.; Bräutigam, K. R.; Kopfmüller, J.; Lehn, H.; Oertel, M.; Quintero, A.; Simon, L.; Stelzer, V.
Plan de Adaptacion al cambio climatico para la region Metropolitana de Santiago de Chile.
2012. Leipzig: Helmholtzzentrum für Umweltforschung (UFZ) 2012 
Lehmann, A.; Matthies, K.; Kopfmüller, J.; Lehn, H.; Finkbeiner, M.
Life cycle costing of water treatment technologies within IWRM, Indonesia.
2012. Interactions of Water with Energy and Materials in Urban Areas and Agriculture : IWRM Conf., Karlsruhe, November 21-22, 2012 
Lehmann, A.; Finkbeiner, M.; Lehn, H.; Kopfmüller, J.
Use of LCA, LCC and SLCA-approach for sustainability assessment of water treatment technologies. A case study.
2012. 18th SETAC Europe LCA Case Study Symposium, Copenhagen, DK, November 26-28, 2012 Book of Abstracts 
Lehn, H.
Water for hydropower, Synergy or competition with other water users - the case of the metropolitan region of Santiago de Chile.
2012. Conference on Environmental Issues of Renewable Energies: Hydropower and Climate Change, Curitiba, BR, November 26-28, 2012 
Nayono, S.; Lehn, H.; Kopfmüller, J.; Lehmann, A.; Londong, J.
Interactions of Water with Energy and Materials in Urban Areas and Agriculture.
2012. IWRM Conference, Karlsruhe, November 21-22, 2012 
Lehn, H.; Simon, L.; Oertel, M.
Sustainable development of megacities - the case of Santiago de Chile.
2012. KIT-Alumni Treffen, Cordoba, RA, 23. November 2012 
Simon, L. M.; Lehn, H.; Oertel, M.
Impacts of climate change on water and agriculture in metropolitan regions - case study of Santiago de Chile.
2012. 7. Jahrestagung des Arbeitskreises Lateinamerika der Deutschen Gesellschaft für Geographie "Zwischenräume: Interdisziplinäre Dialoge zu Lateinamerika", Berlin, 9.-10. November 2012 
Simon, L. M.; Lehn, H.; Oertel, M.
How to balance urban and agricultural water related needs under changing conditions in the Maipo catchment, Chile?.
2012. International Conference on Demographic and Climate Challenges in the City, University of Aachen, April 18-20, 2012 
Simon, L. M.; Lehn, H.; Oertel, M.
How to balance urban and agricultural water related needs in the MRS.
2012. 32nd International Geographical Congress, Köln, August 26-30, 2012 
Simon, L. M.; Lehn, H.
The sustainability performance of the water and sanitation sector in Santiago de Chile.
2012. IWA Conference: Cities for the Future - Sustainable Urban Planning and Water Management, Stockholm, S, May 22-25, 2011 
Simon, L. M.; Lehn, H.
Climate adaptation Santiago - climate adaption strategies for a sustainable water management in the metropolitan region of Santiago de Chile.
2012. Resilient Cities: 2nd World Congress on Cities and Adaptation to Climate Change, Bonn, June 3-5, 2011 
Simon, L.; Lehn, H.; Oertel, M.
Climate change impacts on the water resources and possible adaptation measures.
2012. 5th Round Table Meeting on the CAS-Project, Santiago de Chile, RCH, November 21, 2011 
Lehn, H.; Reuß, M.
Water infrastructure problematics. Grid-bound infrastructures - a risk for degrowth and sustainable development?.
2012. Poster: 3rd International Conference on Degrowth, Ecological Sustainability and Social Equity, Venezia, I, September 19-23, 2012 
Simon, L. M.; Lehn, H.
Klimaanpassungsstrategie für die Metropolregion Santiago de Chile und regionales Lernnetzwerk in Megastädten Lateinamerikas.
2012. Vortrag: City2020+ Lebensqualität für die Zukunft; Tagung und interdisziplinäre Debatte an der RWTH Aachen, 9.-10. Mai 2011 
Barton, J.; Kopfmueller, J.; Lehn, H.; Stelzer, V.
Climate change and resource governance in Santiago de Chile: integrating scale considerations for more sustainable development.
2012. 32nd Internat.Geographical Congress, Köln, August 26-30, 2012 
Simon, L. M.; Lehn, H.; Oertel, M.
How to balance urban and agricultural water related needs under changing conditions in the Maipo catchment, Chile?.
2012. Australias National Climate Change Adaptation Research Facility (NCCARF) Annual Conf., Melbourne, AUS, June 26-28, 2012 
Simon, L. M.; Lehn, H.; Oertel, M.
Satisfying future agricultural and urban water needs under changing climatic conditions in the metropolitan region of Santiago de Chile.
2012. Interactions of Water with Energy and Materials in Urban Areas and Agriculture : IWRM Conf., Karlsruhe, November 21-22, 2012 
Lehn, H.
Bathing waters in cities - a nexus between today’s social wants and ecological needs of tomorrow.
2012. Interactions of Water with Energy and Materials in Urban Areas and Agriculture : IWRM Conf., Karlsruhe, November 21-22, 2012 
Lehn, H.; McPhee, J.; Vogdt, J.; Schleenstein, G.; Simon, L.; Strauch, G.; Godoy Barbieri, C. H.; Gatica, C.; Nino, Y.
Risks and opportunities for sustainable management of water resources and services in Santiago de Chile.
2012. Heinrichs, D. [Hrsg.] Risk Habitat Megacity Heidelberg [u.a.] : Springer, 2012 e-ISBN 978-3-642-11544-8, 251–278 
2011
Simon, L. M.; Lehn, H.
The sustainability performance of the water and sanitation sector in Santiago de Chile.
2011. Cities of the Future Xi’an - Technologies for Integrated Urban Water Management (CoF-Xian 2011), Xian, China, September 15-19, 2011 
Lehmann, A.; Lehn, H.; Kopfmüller, J.; Finkbeiner, M.
Life cycle based sustainability assessment of technologies for sanitation. Case study: IWRM, Gunung Kidul, Java, Indonesia.
2011. Internat.Conf.on Integrated Water Resources Management, Dresden, October 12-13, 2011 
Barton, J.; Kopfmüller, J.; Lehn, H.; Stelzer, V.
Ciudades-regiones, cambio climatico y la gestion de recursos naturales: Repensando la localizacion de decisiones para un fortalecimiento del desarrollo sustentable en la RMS.
2011. 32.Congreso Nacional y 17.Internacional de Geografia ’Conciencia Geografica en el Tercer Milenio’, Valparaiso, RCH, 22-25 de Noviembre 2011 
Lehn, H.; Simon, L.; Oertel, M.
Estrategias de adaptacion al cambio climatico.
2011. Vortr.: Heidelberg Center para America Latina, Santiago de Chile, RCH, 21.November 2011 
Schleenstein, G.; Lehn, H.
Alternatives for a sustainable management of stormwater in megacities of emerging countries. The case of Santiago de Chile.
2011. Integrated Water Resources Management : Internat.Conf., Karlsruhe, November 24- 25, 2010 
Lehn, H.
Der Welt mangelt es nicht an Wasser sondern an integrierten Wassermanagementsystemen.
2011. Das Wasser und wir : 13.Potsdamer Begegnungen, Potsdam, 6.-7.Juni 2011 
Lehmann, A.; Finkbeiner, M.; Lehn, H.; Kopfmüller, J.
Life-cycle based sustainability assessment as decision support for an integrated water resources management in an Indonesian karst region.
2011. Life Cycle Management Conf.2011 (LCM 2011), Berlin, August 28-31, 2011 
Lehn, H.
Wasserforschung am ITAS.
2011. KIT-Workshop ’Zukunftskonzept Wasser’, Karlsruhe, 4.Juli 2011 
Lehn, H.
Nachhaltiges Management von Wasserressourcen und Wasserdienstleistungen - das Beispiel Santiago de Chile.
2011. RECAST Urumqi Konf.Ressourceneffizientes Wirtschaften, Heidelberg, 12.-14.Juli 2010 
Lehn, H.; Kopfmüller, J.; Stelzer, V.; Quintero, A.; Simon, L.
Climate adaptation Santiago.
2011. IFAT 2010 : Messe für Wasser-, Abwasser-, Abfall- und Rohstoffwirtschaft, München, 13.-17.September 2010 
Lehn, H.
Nachhaltige Entwicklung als Ziel für ein Wassermanagement.
2011. KIT Oberrheingraben-Workshop, Karlsruhe, 22.März 2011 
Lehmann, A.; Lehn, H.; Kopfmüller, J.; Finkbeiner, M.
Life cycle assessment (LCA) as a decision support tool for technologies within an IWRM.
2011. Internat.Conf.on Integrated Water Resources Management,Karlsruhe, November 24- 25, 2010 
2010
Lehn, H.; Schleenstein, G.
Alternatives for a sustainable management of stormwater in megacities of emerging countries. The case of Santiago de Chile.
2010. Integrated Water Resources Management Karlsruhe 2010: IWRM, International Conference, 24 - 25 November 2010 conference proceedings. Ed.: H. Steusloff, 329–335, KIT Scientific Publishing, Karlsruhe 
Lehn, H.
Technologies for sustainable urban water management - dissolving the antogonism between urban comfort and hygienic pollution of urban environs.
2010. Parodi, O. [Hrsg.] Towards Resilient Water Landscapes - Design Research Approaches from Europe and Australia : Proc.of the Internat.Symp.on Water Landscapes at the University of New South Wales, Sydney, AUS, October 2009 Karlsruhe : KIT Scientific Publ., 2010 
Lehn, H.
Risk habitat megacity - stakeholder participation.
2010. 5th World Urban Forum, Rio de Janeiro, BR, March 22-26, 2010 
Lehn, H.
Risk habitat megacity.
2010. 5th World Urban Forum, Rio de Janeiro, BR, March 22-26, 2010 
Lehn, H.; Lüthi, C.; Panesar, A.
Sanitation in cities - a framework for action.
2010. 11th SuSanA-Meeting, Rio de Janeiro, BR, March 19-21, 2010 
Lehn, H.; Lüthi, C.; Panesar, A.
Sustainable sanitation for cities.
2010. 2nd LatinoSan : Universalization and Sustainability of the Sanitation Services, Foz do Iguacu, BR, March 14-18, 2010 
Lehn, H.
Technologies for sustainable urban water management - dissolving the antagonism between urban comfort and hygienic pollution of urban environs.
2010. Resilient water landscapes : design approaches from Europe and Australia ; proceedings of the International Symposium on Water Landscapes at the University of New South Wales, Sydney, October 2009. Ed.: O. Parodi, 59–72, KIT Scientific Publishing, Karlsruhe 
2009
Kopfmüller, J.; Lehn, H.; Nuissl, H.; Krellenberg, K.; Heinrichs, D.
Sustainable development of megacities: an integrative research approach for the case of Santiago metropolitan region.
2009. Die Erde <Berlin>, 140 (4), 417–48 
Lehn, H.; Kopfmüller, J.
Megacities - a crucial factor for a globally sustainable development.
2009. Die Erde <Berlin>, (Editorial), 140 (4) 
Lehn, H.
The research initiative ’Risk Habitat Megacity’.
2009. Vortr.: Universidade Federal do Parana, BR, 6.April 2009 
2008
Lehn, H.
Tratamiento y gestion del recurso hidrico para un desarrollo sostenible.
2008. Desafios y Soluciones para las Megaciudades : Foro Internacional Bogota - Berlin - Beijing, Bogota, CO, Octubre 1-2 de 2008 
Lehn, H.
Criteria and indicators for sustainable sanitation.
2008. IWA World Water Congress and Exhibition, Wien, A, September 7-12, 2008 
Lehn, H.
Risk Habitat Megacity - zur Nachhaltigkeit von Wasserdienstleistungen in einer Metropole Latein Amerikas.
2008. Vortr.: Universität Kassel, 24.Juni 2008 Vortr.: Universität Karlsruhe, 16.Juli 2008 
Lehn, H.; Kopfmüller, J.; Nuissl, H.; Bartosch, A.
Do megacities and metropolitan areas pose a risk to sustainable development?.
2008. World Water Week, Stockholm, S, August 17-23, 2008 
Lehn, H.
Sustainable water resources management in the 21st century.
2008. Vortr.: Evangelische Akademie, Bad Boll, 17.Mai 2008 
Lehn, H.
Risk Habitat Megacities.
2008. Natural Disasters : Catastrophe Management and Prevention ; Alumni Experts Workshop, Santiago de Chile, RCH, March 31 - April 2, 2008 
2007
Lehn, H.; Schildt, A.; Kopfmüller, J.
Secure water supply as a central element of sustainable water management: systems analysis approach for the Gunung Sewu region in Central Java, Indonesia.
2007. Sharan, Y. [Hrsg.] Water Supply in Emergency Situations : Proc.of the NATO Advanced Research Workshop, Tel-Aviv, IL, June 5-7, 2005 Berlin [u.a.] : Springer, 2007 (NATO Science for Peace and Security Series C: Environmental Security) 
Lehn, H.; Schildt, A.; Kopfmüller, J.
Secure water supply as a central element of sustainable water management: systems analysis approach for the Gunung Sewu region in Central Java, Indonesia.
2007. Sharan, Y. [Hrsg.] Water Supply in Emergency Situations : Proc.of the NATO Advanced Research Workshop, Tel-Aviv, IL, June 5-7, 2005 Berlin [u.a.] : Springer, 2007 (NATO Science for Peace and Security Series C: Environmental Security), 77–86 
Lehn, H.
Megatrend Urbanisation: Fakten, Trends und ihre Folgen.
2007. Siemens Forum Megatrend Urbanisation : Entwicklungen und Potenziale, München, 6.November 2006 
2006
Kopfmüller, J.; Lehn, H.
Nachhaltige Entwicklung in Megacities.
2006. Kopfmüller, J. [Hrsg.] Ein Konzept auf dem Prüfstand : Das integrative Nachhaltigkeitskonzept in der Forschungspraxis Berlin : edition sigma, 2006 (Global zukunftsfähige Entwicklung - Nachhaltigkeitsforschung in der Helmholtz-Gemeinschaft ; 12), 269–82 
Zimbelmann, M.; Lehn, H.
Contribution of dry sanitation to the MDGs and a sustainable development.
2006. 2nd Internat.Dry Toilet Conf., Tampere, SF, August 16-19, 2006 
Lehn, H.
Die Ressource Wasser im 21.Jahrhundert.
2006. Vortr.: Evangelische Akademie Bad Boll, 4.März 2006 
2005
Lehn, H.; Kopfmüller, J.
Risk habitat megacities. Function of the 3 cross cutting themes.
2005. Desarrollo Sustentable en Areas Metropolitanas, Universidad de Chile, Santiago de Chile, RCH, 30 Noviembre 2005 
Lehn, H.
Transdisciplinarity in the water sector.
2005. Workshop ’Transdisciplinarity in the Environmental Research - Concept and Project Experiences’, Leipzig, September 16, 2005 
Lehn, H.
Sustainable sanitation systems. Dissolving the antagonism between urban comfort and hygienic pollution of urban environs.
2005. Wilding, P. [Hrsg.] 6th Internat.Summer Academy on Technology Studies : Urban Infrastructure in Transition: What can we learn from History?, Graz, A, July 11-17, 2004 Proc. Graz, 2004, 181–93 
Lehn, H.; Kopfmüller, J.; Ackermann, R.
Systems analysis and technology assessment for an IWRM at Yogyakarta special province.
2005. Workshop Integriertes Wasserressourcen-Management (IWRM), Yogyakarta, RI, 1.-2.März 2005 
2004
Lehn, H.
Sustainable sanitation systems. Removal of the contradiction between urban comfort and hygienic pollution of its environs?.
2004. 6th Internat.Summer Academy on Technology Studies : Urban Infrastructure in Transition: What can we learn from History?, Graz, A, July 11-17, 2004 
Lehn, H.
Nachhaltiger Umgang mit Grundwasser im Rhein-Neckar-Raum.
2004. Grundwasser: gestern zu wenig, heute zu viel - und morgen?, Viernheim, 31.März 2004 
Lehn, H.
Globaler Überblick über die Ressource Wasser im 21.Jahrhundert.
2004. Tagung ’Wasser - die unentbehrliche Ressource’, Weil der Stadt, 12.-14.März 2004