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Geographic Information Systems (GIS), Remote Sensing, GPS,
GIS Programming, Environmental Modelling, Water Resources Management.
Doctor of Philosophy, 2006, University of Massachusetts-Amherst, Amherst, MA.
Dissertation: Development and Validation of a Watershed Forest Management Information System.
Bachelor of Engineering, 1993, Beijing Forestry University, Beijing, China.
Major: Forestry and Wood Working Machinery.
9/2015 – Present: Associate Professor.
1/2009 – 8/5015: Assistant Professor.
GeoTREE Center, Department of Geography, University of Northern Iowa.
8/2007 – 1/2009: Visitng Assistant Professor.
9/2006 – 8/2007: Post Doctoral Research Associate.
Deptartment of Natural Resources Conservation, University of Massachusetts-Amherst.
1/2002 – 8/2006: Research Assistant.
International Cooperation Department, Beijing Forestry University.
7/1993 – 12/2001: Program Management Officer.
Unger, D., S. Schwab, R. Jacques, Y. Zhang, I. Hung, and D. Kulhavy, 2016. Evaluating interactive transect area assessments hands-on instruction for natural resource undergraduate students. Higher Education Studies 6(4): 90-99.
Unger, D., D. Kulhavy, I. Hung, and Y. Zhang. 2016. Accuracy Assessment of Pictometry® Height Measurements Stratified by Cardinal Direction and Image Magnification Factor. International Journal of Geospatial and Environmental Research: 3(1):4, http://dc.uwm.edu/ijger/vol3/iss1/
Kulhavy, D, D. Unger, I. Hung and Y. Zhang. 2016. Comparison of AR. Drone quadricopter video and the visual CTLA method for urban tree hazard rating. Journal of Forestry, DOI: http://dx.doi.org/10.5849/jof.15-005.
Kulhavy, D, D. Unger, Y. Zhang, P. Bedford, and I. Hung. 2016. Comparing Remotely Sensed Pictometry® Web Based Slope Distance Estimates with In Situ Total Station and Tape Slope Distance Estimates. International Journal of Geospatial and Environmental Research: 3(1):3.
Zhang, Y., M.W. McBroom, B.P. Oswald, and W. Conway. 2014. Visual Traverse: an open source Python program to assess, post-process and visualize polygon data. J. of Surveying Engineering, under review.
Zhang, Y. and P.K. Barten. 2014. Forest road evaluation: terrain analysis to identify sediment source areas. J of Forestry, under review.
Unger, D.R., I. Hung, Y. Zhang, and D.L. Kulhavy. 2014. Evaluating GPS effectiveness for natural resource professionals: integrating undergraduate students in the decision making process. J. of Studies in Education. 4(4): 30-44 DOI: 10.5296/jse.v4i4.6389.
McBroom, M.W., M. Ringer, and Y. Zhang. 2014. In stream woody debris and riparian forest characteristics in the Sabine River, Texas. Southeastern Naturalist, 13(5): 1-14.
Unger, D.R., D.L. Kulhavy, I. Hung, and Y. Zhang. 2014. Quantifying natural resources using field-based instruction and hand-on applications. J. of Studies in Education, 4(2):1-14.
Zhang, Y., H. Li, M. McBroom and S. Bullard. 2013. A spatial analysis of the forestry industry in East Texas, Annals of GIS, 19(3): 187-193 DOI: 10.1080/19475683.2013.806357.
Unger, D.R, I. Hung ,Y. Zhang, J. Parker, D. Kulhavy, and D. Coble. 2013. Accuracy assessment of perimeter and area calculations using consumer-grade Global Positioning Systems (GPS) units in southern forests. Southern J. of Applied Forestry, 37(4): 208-215.
McBroom, M.W., T.N. Thomas, and Y. Zhang. 2012. Soil erosion and surface water quality impacts of natural gas development in east Texas, USA. Water, 4(4):944-958 DOI:10.3390/w4040944.
DeGroote P. J., S.R. Larson, Y. Zhang, R. Sugumaran. 2012. Application of geospatial technologies for understanding and predicting vector populations and vector-borne disease incidence, Geography Compass, 6(11): 645-659 DOI: 10.1111/gec3.12003.
TEACHING EXPERIENCE AT STEPHEN F. AUSTIN STATE UNIVERSITY.
GIS 301: GIS application.
GIS 395: GIS database management.
GIS 400/500: GIS programming.
GIS 464/564: GIS for water resources.
FOR 223: Surveying and mapping.
FOR 323: Land measurement.
Faculty Learning Community VI: mentored undergraduate scholarship, SFA Office of High Impact Practices (2013-2014)
Texas GIS Forum Hacker’s Sandbox, Texas Water Development Board and Texas Natural Resources Information System, Austin (2013)
Memberships and Involvement:
Society of American Foresters (SAF)
International Association of Hydrological Sciences.
ESRI Forestry Group.
The New York Water Environment Association (previous)
Xi Sigma Pi (Forestry Honor Society), 2005 at UMass-Amherst.
Served as a peer reviewer:
Applied Engineering in Agriculture.
Journal of Environmental Management.
Journal of Soil and Water Conservation.
Journal of Water Resources Planning and Management.
Journal of Environmental Informatics.
International Journal of Geographical Information Science.
Remote Sensing of Environment.
Journal of Environmental Quality.
Stochastic Environmental Research & Risk Assessment.
The Extractive Industries and Society.
Water Environmental Research.
Hydrological Sciences Journal.
Reviewed Hydrology and Floodplain Analysis for Pearson Higher Education .
Reviewed Getting Started with Geographic Information System, 5 th edition for Pearson Higher education (2011)