College of Agriculture & Natural Resources
Environmental Science & Technology

David Tilley

Associate Professor

Department of Environmental Science and Technology
1421 Animal Sci./Ag. Engr. Bldg.
College Park, MD 20742



David Tilley is an Associate Professor of Ecological Engineering in the Department of Environmental Science and Technology at the University of Maryland. Dr. Tilley defines ecological engineering as “the emerging field that combines natural and applied sciences, especially systems ecology, with the discipline of engineering to design, build, and operate new ecosystem-types that connect society with nature for the benefit of both.” His Ecosystem Engineering Design Lab (EEDL) works on determining the effects of ecological systems, such as green walls, green roofs, and artificial wetland gardens, on energy balance, water balance and water quality of the built environment. The EEDL also ruminates on the theoretical basis of dynamic emergy accounting, which can be used for environmental accounting independent of neoclassical economic biases. Dr. Tilley teaches Design for Urban Water & Energy (DUWE), Energy & Environment, Computer-aided Design for Ecology, and Emergy Analysis. He received his doctoral degree from the University of Florida’s Environmental Engineering Sciences program in 1999. Dr. Tilley was the first President of the International Society for the Advancement of Emergy Research, which was formed in 2008. Dr. Tilley serves as a Co-Editor-in-Chief of the new Journal of Living Architecture and on the editorial board of the Journal of Environmental Accounting and Management (1st issue 2012).

Courses Taught: 

Design for Urban Water and Energy (ENST 477)
Description: Sustainability of energy and water in urban watersheds. Principles of energy and water dynamics in the urban environment. Role of natural and artificial ecosystems in improving water quality, naturalizing hydrology, supporting ecological habitat and mitigating urban heat island. Ecological designs for minimizing use of energy and water in urban environments and sustainability evaluation techniques are discussed. Lecture (3 credit hr). Fall semesters beginning 2011.

Computer Aided Design in Ecology (ENST 281)
Description: Basics of computer aided drawing (CAD) and dynamic ecosystem simulation modeling with iconographic software will be introduced with an emphasis on applications to the design of constructed ecosystems. Ecosystems may include constructed wetlands, restored streams and green walls. Lecture+Lab (3 credit hr). Spring semesters beginning 2010.

Solar Decathlon (ENST 499D)
Description: Ecological technologies and designs for the living systems aspects of the UMD Solar Decathlon entry (2011). Topics will involve an interdisciplinary examination of how living systems can be integrated into the interior and exterior of the home to improve energy conservation, water recycling and indoor air quality. There will be frequent interaction with engineering and architecture student-groups involved in Solar Decathlon. Practicum (1-3 credit hrs. Beginning Spring 2010.

Embodied Energy Analysis (ENST 689Q/MEES 698N)
Description: Introduction to embodied energy theory, known as emergy, and its application for understanding complexity in energy and environmental systems. Seminar (1 credit hr). Fall semester (2009)

Energy & Environment (ENST 405/605)
Description: Introduction to the role of energy in environmental and human-dominated systems. Discussion of the historical and modern production and consumption of energy. Introduction to energy systems computer simulation and energy auditing. Review of national energy policies. Lecture (3 credit hrs). Spring semesters (2006-present)

Restoration Ecology (ENST 444)
Description: Discussion of the philosophies, principles and practices of restoring ecosystems.  Presentation of case histories of restoration projects to include wetland, terrestrial, urban, beach, aquatic and new ecosystems. Lecture with Field Experience (3 credit hrs). Fall semesters 2002-present.

Ecology, Energy, & Alternative Futures (HONR 229M)
Description: The human as ecological player, consuming resources, manipulating landscapes, and creating wastes, will be assessed from a systems ecology perspective.  We will develop and discuss scenarios for humanity’s response to future conditions, whether it is world depletion of fossil fuel, massive terrorism, natural disease outbreak, international war, or glorious expansion of human civilization through technological innovation.  Hybrid: Seminar + Lecture with Field Experience (3 credit hrs). Fall 2003.

Ecological Decision Making (ENBE 699D & MEES 698D)
Description: Introduction to ecosystem modeling and environmental accounting for understanding and evaluating the connections between nature and economy for informed decision-making. Discussion of the work of ecosystems supporting human life and prosperity. Lecture (3 credit hrs). Spring 2003, 2005.

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