Poganietz, W.-R.; Friedrich, J.; Lehn, H.
Eco-efficiency of system alternatives of the urban Water-Energy-Waste Nexus
2021. NachhaltigkeitsManagementForum = Sustainability Management Forum, 29, 119–131. doi:10.1007/s00550-021-00517-5  

Friedrich, J.; Poganietz, W. R.; Lehn, H.
Life-cycle assessment of system alternatives for the Water-Energy-Waste Nexus in the urban building stock
2020. Resources, conservation and recycling, 158 (104808), Art. Nr.: 104808. doi:10.1016/j.resconrec.2020.104808 

Vergara-Araya, M.; Lehn, H.; Poganietz, W.-R.
Integrated water, waste and energy management systems – A case study from Curauma, Chile
2020. Resources, conservation and recycling, 156, Article no: 104725. doi:10.1016/j.resconrec.2020.104725 

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, Competence Center of Urban and Regional Planning (CORP) 

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 (CORP) 

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 (2018), Berlin, Germany, 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), Tokyo, Japan, October 9–12, 2018 

Lehn, H.
Nachhaltigkeitsüberlegungen zu Wasserprojekten in Entwicklungs- und Schwellenländern
2018. Technische Universität Darmstadt, 15.Januar 2018 

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), Vienna, Austria, April 4–6, 2018 

Friedrich, J.; Steiner, F.; Weiss, A.; Lehn, H.
Experience different perspectives on the urban water-energy nexus
2017. Chair auf dem Workshop der SIWI World Water Week (2017), Stockholm, Sweden, August 28, 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 

Lehn, H.
El Nexo Energia - Agua en los Contextos Urbanos
2017. Besuch einer Delegation aus der VIII. Region Chiles am KIT (2017), Karlsruhe, Germany, May 2, 2017 

Lehn, H.
Was haben die Städte damit zu tun, dass wir in den meisten deutschen Flüssen nicht mehr schwimmen dürfen?
2017. Themenabend ’Abwasser ist mehr als Abfall’, ITAS, Karlsruhe, 11.Mai 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 

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.; 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 

Nayono, S.; Lehmann, A.; Kopfmüller, J.; Lehn, H.
Improving sustainability by technology assessment and systems analysis: the case of IWRM Indonesia
2016. Applied water science, 6 (3), 279–292. doi:10.1007/s13201-016-0427-y  

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 

Lehn, H.
El nexo agua-energia en la agricultura bajo el contexto del cambio climatico
2016. Universidad de Concepcion, RCH, 26.Dezember 2016 

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 La Serena, Ovalle, RCH, 14.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 

Lehn, H.
Waste water: hygienic threat and precious resource
2015. Vortr.: Khon Kaen University, T, 7.Oktober 2015 

Lehn, H.
Nachhaltigkeitsüberlegungen zum Wasser-Energie-Nexus - mit einem Fokus auf die urbane Umwelt
2015. HCE-Kolloquium ’Heidelberger Brücke’, Heidelberg, 26. Januar 2015 

Lehn, H.
Sustainable urban water management - understanding waste water as a precious resource
2015. Workshop " Sustainable Water Resource Management. Perspectives from Europe and South Asia" (2015), New Delhi, India, September 28–29, 2015 

Lehn, H.
How to adapt buildings towards a better resource efficiency
2015. Encuentros ChileGlobal (2015), Rotterdam, Netherlands, July 8–10, 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 

Poganietz, W.-R.; Fuss, M. B.; Lehn, H.
Integrating separate flow treatment systems for solid waste and waste water treatment - a concept
2015. Bundesuniversität des Staates Minas Gerais (2015), Belo Horizonte, Brazil, April 24, 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.
Ressourceneffiziente Stadt: Kostbares Abwasser
2014. Klima und Umwelt News, (2), 6 

Lehn, H.
Ohne nachhaltiges Wassermanagement keine nachhaltige Entwicklung
2014. GWF / Wasser, Abwasser, 155 (3), 22–23 

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.
Systems analysis and integrative sustainability assessment to support IWRM Indonesia
2014. 7. IWRM Statusworkshop (2014), Yogyakarta, Indonesia, April 1, 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 

Cuchacovich, J. C.; Lehn, H.
Caudales ambientales, espacios para gobernanza colaborativa
2013. CELAC-PHI - Primer Congreso en EcoHidrologia para America Latina y El Caribe, Santiago de Chile (2013), Santiago, Chile, November 11–13, 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.
Wasser - was tun für einen nachhaltigeren Umgang
2013. Lions Club Walldorf-Astoria (2013), Walldorf, Germany, June 5, 2013 

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 

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.; 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 

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.; 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 

Lüthi, C.; Lehn, H.; Norström, A.; Panesar, A.; Rüd, S.; Saywell, D.; Verhagen, J.; Ulrich, L.; Ingle, R.
Planning of sustainable sanitation for cities
2012. Compilation of 13 factsheets on key sustainable sanitation topics. Ed.: E. Münch, 1–8, Sustainable sanitation alliance 

Simon, L. M.; Lehn, H.
The sustainability performance of the water and sanitation services in Santiago de Chile
2012. Water Science and Technology: Water Supply, 12, 854–861. doi:10.2166/ws.2012.061 

Nayono, S.; Lehn, H.; Kopfmüller, J.; Lehmann, A.; Londong, J.
Development of a tool to analyze wastewater treatment sustainability: Indicators to assess technologies for rural areas in developing countries
2012. IWRM 2012, Integrated Water Resources Management. Conference Proceedings. Ed.: H. Steusloff, 283–289, Fraunhofer Verlag 

Krellenberg, K.; Müller, A.; Welz, J.; Nagel, J.; Bräutigam, K.-R.; Kopfmüller, J.; Lehn, H.; Quintero, A.; Oertel, M.; Simon, L.; Stelzer, V.
Clima Adapatación Santiago
2012. Helmholtz Zentrum für Umweltforschung (UFZ) 

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 

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 

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 

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 

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.; Simon, L.; Oertel, M.
Sustainable development of megacities - the case of Santiago de Chile
2012. KIT-Alumni Treffen, Cordoba, RA, 23. November 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 

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 

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. 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 

Simon, L. M.; Lehn, H.; Oertel, M.
How to balance urban and agricultural water related needs in the MRS regions - Case study of Santiago de Chile
2012. 32nd Internatational Geographical Congress (IGC 2012), Cologne, Germany, August 26–30, 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.; 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.; 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 

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 

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 

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 

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.
Gestion sostenible del agua. La conexion eminente de cuantidad y cualidad [Nachhaltiges Wassermanagement - der wichtige Konnex zwischen Quantität und Qualität]
2011. Vortr.: Universität Cordoba, E, 11.November 2011, Vortrag, Universität Córdoba (2011), Cordova, Spain, November 11, 2011 

Lehn, H.
Gestion sostenible del agua. Ejemptos de Indoesia, Chile y Alemania [Nachhaltiges Wassermanagement - Beispiele aus Indonesien, Chile und Deutschland]
2011. Vortr.: Universitäg Cordoba, E, 7.Oktober 2011, Vortrag, Universität Córdoba (2011), Cordova, Spain, October 7, 2011 

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 

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.
Nachhaltige Entwicklung als Ziel für ein Wassermanagement
2011. KIT Oberrheingraben-Workshop, Karlsruhe, 22.März 2011 

Lehn, H.; Simon, L.; Oertel, M.
Estrategias de adaptacion al cambio climatico [Strategien zur Anpassung an den Klimawandel]
2011. Vortr.: Heidelberg Center para America Latina, Santiago de Chile, RCH, 21.November 2011, Heidelberger Center para América Latina der Universität Heidelberg in Santiago de Chile - Studium Generale “Riesgos, recursos y cambio climático” (2011), Santiago, Chile, November 21, 2011 

Lehn, H.; Stork, K.
Water born recreation in urban areas as link between ecological needs and socio-economic wants
2011. World Water Week, Stockholm, S, August 21-27, 2011 

Nayono, S.; Lehn, H.; Kopfmüller, J.; Londong, J.
Options for decentralized waste water treatment in rural karst area of Gunung Kidul: social acceptance
2011. Asian Trans-Disciplinary Karst Conference (2011), Yogyakarta, Indonesia, January 7–10, 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 

Simon, L. M.; Lehn, H.
The sustainability performance of the water and sanitation sector in Santiago de Chile: Part of the German-Chilean “Risk Habitat Megacity” Research initiative (2007-2010)
2011. IWA Conference "City for the Future" (2011), Stockholm, Sweden, 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
2011. 2nd World Congress on Cities and Adaptation to Climate Change (2011), Bonn, Germany, June 3–5, 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 

Simon, L. M.; Lehn, H.; Oertel, M.
Agua - El impacto del cambio climático y medidas de adaptación
2011. Roundtable zum CAS-Projekt (2011), Santiago, Chile, November 21, 2011 

Nayono, S.; Singer, M.; Lehn, H.; Kopfmüller, J.
Sustainable sanitation as a part of an IWRM in the karst area of Gunung Kidul: community acceptance and opinion
2010. Water Practice and Technology, 5(2012), 5 (4), 104. doi:10.2166/wpt.2010.104 

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, 59–70, KIT Scientific Publishing 

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 

Lehn, H.
Risk habitat megacity: Nachhaltiges Management von Wasserressourcen und Wasserdienstleistungen - das Beispiel Santiago de Chile
2010. RECAST Urumqi Konferenz (2010), Heidelberg, Germany, July 13–14, 2010 

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.; Kopfmüller, J.; Stelzer, V.; Quintero, A.; Simon, L.
Climate adaptation Santiago
2010. IFAT 2010 : Messe für Wasser-, Abwasser-, Abfall- und Rohstoffwirtschaft, München, 13.-17.September 2010, IFAT (2010), Munich, Germany, September 13–17, 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 

Lehmann, A.; Lehn, H.; Kopfmüller, J.; Finkbeiner, M.
Life cycle assessment (LCA) as a decision support tool for technologies within an IWRM
2010. Internat.Conf.on Integrated Water Resources Management,Karlsruhe, November 24- 25, 2010, International Conference on Integrated Water Resources Management (IWRM 2010), Karlsruhe, Germany, November 24–25, 2010 

Kopfmüller, J.; Lehn, H.; Heinrichs, D.; Nuissl, H.; Krellenberg, K.
Die HGF-Forschungsinitiative “Risk Habitat Megacity”: Ziele, Ansatz, Fragestellungen
2009. Technikfolgenabschätzung, Theorie und Praxis, 18 (1), 35–45 

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 - ein zentraler Faktor für eine global nachhaltige Entwicklung: Einführung in den Schwerpunkt
2009. Technikfolgenabschätzung, Theorie und Praxis, 18 (1), 4–7 

Lehn, H.; Kopfmüller, J.
Megacities - a crucial factor for a globally sustainable development
2009. Die Erde <Berlin>, (Editorial), 140 (4), 337–340 

Lehn, H.; Parodi, O.
Wasser - elementare und strategische Ressource des 21.Jahrhunderts. Teil I. Eine Bestandsaufnahme
2009. Umweltwissenschaften und Schadstoff-Forschung, 21, 272–281. doi:10.1007/s12302-009-0052-6 

Lehn, H.
The research initiative ’Risk Habitat Megacity’
2009. Vortr.: Universidade Federal do Parana, BR, 6.April 2009 

Lehn, H.
Treatment and management of water ressources
2008. Fachkongress im Rahmen der Expo Deutschland: Bogota - Berlin - Beijing. Challenges Solutions for Megacities (2008), Bogotá, Colombia, October 2, 2008 

Lehn, H.
Risk habitat megacity - sostenibilidad en riesgo?
2008. KIT Alumni Experts Natural desasters (2008), Santiago, Chile, March 31, 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.
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 

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.; Kopfmüller, J.
Start der Hauptphase bei Risk Habitat Megacity : Neues HGF-Verbundsprojekt
2007. Technikfolgenabschätzung, Theorie und Praxis, 16 (2), 76–78. doi:10.14512/tatup.16.2.76 

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 

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) 

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 

Lehn, H.
Die Ressource Wasser im 21.Jahrhundert
2006. Vortr.: Evangelische Akademie Bad Boll, 4.März 2006 

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 

Mödinger, J.; Kobus, H.; Schnitzler, S.; Lehn, H.
Ansätze für eine nachhaltige Grundwasserbewirtschaftung und -nutzung im Rhein-Neckar-Raum bei konkurrierenden Interessen
2005. WasserWirtschaft, (2004), 94 (12), 40–45 

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.
Transdisciplinarity in the water sector
2005. Workshop ’Transdisciplinarity in the Environmental Research - Concept and Project Experiences’, Leipzig, September 16, 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.; 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 

Lehn, H.; Schildt, A.; Kopfmüller, J.
Secure water supply as a central element of sustainable water management - Systems analytical approach for Gunung Sewu (Central Java, Indonesia)
2005. NATO Advanced Research Workshop (ARW) "Supply of Water to Cities in Emergency Situation" (2005), Tel Aviv, Israel, June 5–7, 2005 

Lehn, H.
J.L. Lozán, H. Graßl, P. Hupfer, L. Menzel, C.-D. Schönwiese (Hrsg.): Warnsignal Klima: Genug Wasser für alle? Wissenschaftliche Fakten. Hamburg: Wissenschaftliche Auswertungen, 2005, 400 S. - Rezension
2005. Technikfolgenabschätzung, Theorie und Praxis, 14 (2), 95–97, Oekom Verlag 

Lehn, H.
Sustainable sanitation systems - Dissolving the antagonism between urban comfort and hygienic pollution of urban environs
2004. Urban infrastructure in transition: what can we learn from history? : International Summer Academy on Technology Studies ; July 11 - 17, 2004, Deutschlandsberg, Austria ; conference proceedings / [organized by: IFF/IFZ, Inter-University Research Centre for Technology, Work and Culture]. Ed.: Peter Wilding, 181–193, IFF/IFZ 

Lehn, H.
Siedlungswasserwirtschaft: mit Vielfalt zum Erfolg ; globale Veränderungen erfordern angepasste Technologien
2004. Zeitung für kommunale Wirtschaft, 50 (10), 18 

Lehn, H.
Mit Vielfalt zum Erfolg. Globale Veränderungen erfordern angepasste Technologien
2004. ZfK - Zeitung für Kommunale Wirtschaft, 50 (10), 18 

Lehn, H.
Die Ressource Wasser im 21. Jahrhundert
2004. Seminar “Wasser, die unentbehrliche Ressource”. Evangelische Akademie Bad Boll - STUBE (2004), Weil der Stadt, Germany, March 12–14, 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