Position: Assistant Professor
Address: Room 280, Overman Hall
Education & Experience:
Assistant Professor, School of Earth, Environment and Society, Bowling Green State University [08/2016 - present]
Research Associate, School of Earth Sciences, The Ohio State University [04/2015 - 08/2016]
Post-doctoral Researcher, School of Earth Sciences, The Ohio State University [09/2011 - 03/2015]
Ph.D., Environmental Science (Specialization: Hydrology and Hydrogeology), The Ohio State University 
M.S., Environmental Science, Sun Yat-sen University 
B.E., Geological Engineering, Lanzhou University 
Specialty Areas of Interest:
Dr. Liu has broad research interests in the fields of hydrology/hydrogeology, limnology, landscape ecology, environmental science and sustainability. His research group and collaborators are dedicated to developing new research ideas to solve critical water resources problems in regions and countries around the world. Specific examples of his research themes include:
• Influence of climatic variability/change on water resources and wetland habitats;
• Closed-basin lakes and paleoclimates;
• Watershed processes and modeling: predictions of ungauged river basins with integrated modeling and geospatial (remote sensing and GIS) technologies; watershed contaminant transport, etc.;
• Complexity of interacting surface-water and groundwater systems;
• Groundwater flow and mass transport in hydrogeological systems; and
• Inverse/optimization problems.
Research opportunities exist in Dr. Liu’s group for highly motivated undergraduate and graduate students who are interested in pursuing a B.S. (Geology; Environmental Science), M.S. (Geology; Applied Geospatial Science) or Ph.D. (through Biology department) degree. Financial support such as teaching and research assistantships will be available for top candidates. For more information, please contact Dr. Liu.
Current BGSU Courses:
GEOL 6160 Watershed Analysis and Modeling (graduate level, Fall 2016)
ENVS 1010 Intro to Environmental Studies (undergraduate level, Spring 2017)
Recent and Current Research or Grants:
United States National Science Foundation (NSF), MacroSystems Biology Program (Role: Co-PI)
Collaborative research: Climatic and anthropogenic forcing of wetland landscape connectivity in the Great Plains (Amount funded: $238,444.00; Duration: 06/2014-05/2017)
Recent Peer Reviewed Publications and Submissions:
Liu, G., F. W. Schwartz, C. K. Wright, N. E. McIntyre (2016). Characterizing the climate-driven collapses and expansions of wetland habitats with a fully integrated surface–subsurface hydrologic model, Wetlands, doi:10.1007/s13157-016-0817-9.
Liu, K.T., K. H. Tseng, C. K. Shum, C. Y. Liu, C. Y. Kuo, G. Liu, Y. Jia, and K. Shang (2016). Assessment of the impact of reservoirs in the upper Mekong River using satellite radar altimetry and remote sensing imageries, Remote Sensing, 8, 367, doi:10.3390/rs8050367.
Gong, Y., G. Liu, and F. W. Schwartz (2015), Quantifying the response time of a lake-groundwater interacting system to climatic perturbation, Water, 7, 6598-6615, doi:10.3390/w7116598.
Liu, G., F. W. Schwartz, K. H. Tseng, and C. K. Shum (2015), Discharge and water-depth estimates for ungauged rivers: Combining hydrologic, hydraulic, and inverse modeling with stage and water-area measurements from satellites, Water Resources Research, 51, 6017–6035, doi:10.1002/2015WR016971.
Liu, G., and F. W. Schwartz (2014), On modeling the paleohydrologic response of closed-basin lakes to fluctuations in climate: Methods, applications, and implications, Water Resources Research, 50, doi:10.1002/2013WR014107.
McIntyre, N. E., C. K. Wright, S. Swain, K. Hayhoe, G. Liu, F. W. Schwartz, and G. Henebry (2014), Climate forcing of wetland landscape connectivity in the Great Plains, Frontiers in Ecology and the Environment, 12, 59-64.
Liu, G., and F. W. Schwartz (2012), Climate-driven variability in lake and wetland distribution across the Prairie Pothole Region: From modern observations to long-term reconstructions with space-for-time substitution, Water Resources Research, 48, W08526, doi:10.1029/2011WR011539.
Liu, G., and F. W. Schwartz (2011), An integrated observational and model-based analysis of the hydrologic response of prairie pothole systems to variability in climate, Water Resources Research, 47, W02504, doi:10.1029/2010WR009084.
Zhang, B., F. W. Schwartz, and G. Liu (2009), Systematics in the size structure of prairie pothole lakes through drought and deluge, Water Resources Research, 45, W04421, doi:10.1029/2008WR006878.
Lee, E. S., G. Liu, F. W. Schwartz, Y. Kim, and M. Ibaraki (2008), Model-based evaluation of controlled-release systems in the remediation of dissolved plumes in groundwater, Chemosphere, 72, 165-173.