Delphis F. Levia, Ph.D. Professor of Ecohydrology Director, Environmental Science and Environmental Studies
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Delphis Levia

Professor of Ecohydrology and Chair, Department of Geography and Spatial Sciences

Ecohydrology Group logo

Series Editor, Ecological Studies- Analysis and Synthesis (Springer Verlag)
Associate Editor, Hydrological Processes (Wiley)
Associate Editor, Journal of Plant Nutrition and Soil Science (Wiley)

Contact information

Department of Geography & Spatial Sciences
University of Delaware
Newark, DE 19716-2541
Tel: 1-302-831-3218
Fax: 1-302-831-6654
Curriculum Vitae


Swiss Alps

Research site in the Swiss Alps (Photo courtesy, Peter Bebi, SLF)

Zeiss scanning-electron microscope

Zeiss scanning-electron microscope used for analysis of particulate matter in forests

Woolly beech aphids

Woolly beech aphids on a beech sapling in Germany

Scanning electron image

Scanning-electron image of a woolly beech aphid on a leaf. Such images are used to better understand the nitrogen dynamics of beech forests.

Liana Bark Surface

Confocal microscope image of a liana bark surface from Barro Colorado Island, Panama. Image analysis will permit better understanding of ant locomotion in tropical forests.

Prof. Levia and son with Joachim Gauck

Prof. Levia and son with German President, Joachim Gauck, at the Schloss Bellevue in Berlin

Forest Hydrology cover

Comprehensive volume edited by Prof. Levia along with Co-Editors D. Carlyle-Moses and T. Tanaka

The Ecohydrology Group at the University of Delaware seeks to better understand the effects of forest canopies on the hydrological and biogeochemical cycles. Our research employs a combination of field and laboratory work and has been funded by the US National Science Foundation, the Humboldt Foundation, and the Japan Society for Promotion of Science, as well as private foundations. Past and current research has taken place in the temperate broadleaved deciduous forest biome of the eastern United States, teak plantations in Thailand, forests in Japan and Spain, the Swiss Alps near Davos, tropical rainforests of Panama, and beech forests of east-central Germany.

We employ cutting-edge sensors and techniques to answer questions of hydrological and biogeochemical importance, including scanning electron microscopy, x-ray photoelectron microscopy, 13C NMR, spectrolysers, disdrometers, spectrophotometers, and terrestrial laser scanning methods.

Our research is centered on the hydrology and biogeochemistry of forests. Just four examples of recent or current research include:

•    The effects of the woolly beech aphid on forest biogeochemistry (with Prof. B. Michalzik, University of Jena, funded by Humboldt Foundation)
•    The North East Water Resources Network (NEWRnet) project to combine cutting-edge science and sensors in watershed hydrology and biogeochemistry with real-time decision-making capabilities for stakeholders (with Profs. D. Leathers, S. Inamdar, K. Messner, W. Ullman, and S. Andres, Delaware Geological Survey, in collaboration with the Universities of Vermont and Rhode Island,  funded by US NSF)
•    Quantification of throughfall drop size distributions in temperate deciduous forests (with Dr. K.Nanko, Forestry and Forest Products Research Institute, Japan)
•    Ecohydrology of teak plantations in Thailand and Japanese cypress and cedar forests in Japan (with Profs. T. Kumagai, N. Tanaka, Y. Shinohara and Dr. K. Nanko, among others, funded by Nagoya University)

Other research includes using high-end microscopes to better understand the cortisphere, an examination on the effects of compound stressors of red oak trees using x-ray photoelectron spectroscopy and other advanced analytical techniques, and mapping bacterial composition of the cortisphere (with Dr. Janice Hudson). Additional projects examine particulate matter dynamics in European beech forests (with Prof. B. Michalzik, University of Jena, funded by Humboldt Foundation) and the phenoseasonal variability of subcanopy PAR and its effect on the understory (with Janice Hudson). A biomechanics project examined the effect of bark microrelief of tropical trees in Panama in relation to ant mobility (with Dr. S. Yanoviak, University of Louisville and John Van Stan, Georgia Southern University, funded by US NSF).

Group news:

Dr. Kerstin Näthe awarded DAAD postdoctoral fellowship to consuct research at the University of Delaware with Prof. Levia!!!!!
Prof. Levia awarded a second Humboldt Fellowship to return to Germany to conduct ecohydrology research with Prof. Dr. Michalzik.
Professor Levia’s book entitled Forest Hydrology and Biogeochemistry: Synthesis of Past Research and Future Directions (published by Springer) has surpassed > 100,000 chapter downloads!!!
Asia Dowtin and Prof. Levia publish article in Science on mentoring!!! See:
Janice Hudson and Sean Hudson secure postdoctoral opportunities in Japan!!!



• Water Science• Eco-hydrology


CEOE School & Departments

School of Marine Science & Policy

Advancing the understanding, stewardship, and conservation of estuarine, coastal, and ocean environments.

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Department of Earth Sciences

Discovering how geological processes have operated over various time scales to create and influence the planet’s surface environments.

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Department of Geography and Spatial Sciences

Providing a unique spatial perspective that seeks to explain patterns of differences and commonality across the human and natural environment.

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College of Earth, Ocean, and Environment • 111 Robinson Hall • Newark, DE 19716 • USA • Phone: 302-831-8062
Geography and Spatial Sciences: 302-831-2294 • Earth Sciences: 302-831-2569 • Marine Science and Policy: 302-645-4212 • E-mail:

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