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Ben Hagedorn

Benjamin Hagedorn

Assistant Professor

Department of Geological Sciences
California State University Long Beach
1250 Bellflower Blvd.
Long Beach, CA 90840-3902

Phone: 562 985-4198
Fax: 562 985-8638
E-mail: Klaus.Hagedorn@csulb.edu

  • EDUCATION
    10/2010: PhD School of Geosciences, Monash University, Melbourne, Australia

    02/2006: M.S. (Dipl.-Geol.) Geological Institute, RWTH University, Aachen, Germany

    RESEARCH FOCUS
    My research focuses mainly on the multiple aspects of the dynamic carbon and water cycles. I am particularly interested in the fluvial transfer of inorganic carbon from continental reservoirs to the ocean and how urban and agricultural development can impact that transfer. In addition, I study silicate lithologies to recognize the mineralogical effects of chemical weathering that can sequester atmospheric CO2. I am also interested in the processes that control groundwater recharge and the interaction between groundwater and surface water reservoirs. I conduct my research at the watershed scale; that is, I perform geochemical surveys and collect and analyze stream, groundwater, rainfall, soil and bedrock samples in an effort to discern the geochemical evolution of carbon and water as they migrate through the watershed. By relating my results to ancillary datasets describing trends in rainfall, runoff, groundwater extraction, and land use, I evaluate the processes that control the temporal and spatial variability of carbon and water transport. I have worked on projects in Germany, Australia, South Africa, Hawaii, Korea and California and am excited to explore new regions for my research.

    PUBLICATIONS
    Journal Articles

    • El-Kadi A., Tillery, S., Whittier, R.B, Hagedorn, B., Mair, A. Ha, K., Koh, G.-W., 2013. Assessing sustainability of groundwater resources on Jeju Island, South Korea, under climate change, drought, and increased usage. Hydrogeology Journal (accepted manuscript)
    • Hagedorn, B., Mair, A., El-Kadi, A., Tillery, S., Ha, K., Koh, G.-W (in Review). Simple equations for estimating temperature patterns on volcanic islands: A case study from Jeju (Republic of Korea). Submitted to Geosciences Journal June, 2013
    • Mair, A., Hagedorn, B., El-Kadi, A., Tillery, S., Ha, K., Koh, G.-W, 2013. Temporal and Spatial Variability of Groundwater Recharge on Jeju Island, Korea. Submitted to Journal of Hydrology, 501, 213-226
    • Kerfoot, H., Hagedorn, B., Verwiel, M., 2013. Evaluation of the Age of Landfill Gas Methane in Landfill Gas/Natural Gas Mixtures Using Co-Occurring Constituents. Environmental Science: Processes & Impacts, 15, 1151-1163
    • Hagedorn, B., El-Kadi, A.-I., Mair, A., Whittier, R.B., Ha, K., 2011. Estimating recharge in fractured aquifers of a temperate humid to semiarid volcanic island (Jeju, Korea) from water table fluctuations, and Cl, CFC-12 and 3H chemistry. Journal of Hydrology, 409, 650-662
    • Moosdorf, N., Hartman, J., Lauerwald, R., Hagedorn, B., Kempe, S., 2011. Atmospheric CO2 consumption by chemical weathering in North America. Geochimica et Cosmochimica Acta, 75, 7829-7854
    • Hagedorn, B., Cartwright, I., Raveggi, M., Maas, R., 2011. Rare earth element and strontium geochemistry of the Australian Victorian Alps drainage system: Evaluating the dominance of carbonate vs. aluminosilicate weathering under varying runoff. Chemical Geology, 284, 105-126
    • Hagedorn, B., Cartwright, I., 2010. The CO2 system in rivers of the Australian Victorian Alps: CO2 evasion in relation to system metabolism and rock weathering on multi-annual time scales. Applied Geochemistry, 25, 881-899
    • Hagedorn, B., Cartwright, I., 2009. Climatic and lithologic controls on the temporal and spatial variability of CO2 consumption via chemical weathering: An example from the Australian Victorian Alps. Chemical Geology 260, 234-253
    • Hagedorn, B., Cartwright, I. 2009. CO2 evasion in relation to system metabolism and rock weathering on multi-annual time scales. A mass balance approach in rivers of the Australian Victorian Alps. Geochimica et Cosmochimica Acta 73 suppl. 1, A485

    Technical Reports

    • Mair, A., Hagedorn, B., Tillery, S., Whittier, R. B., El-Kadi, A.I., 2011. Water Budget Analyses and Sustainable Yield Estimation on Jeju Island - Alternative Groundwater Recharge Estimation, Climate Data Analysis, Water Balance Modeling, and Sustainable Yield Assessment. Phase II Report, Prepared for Korea Institute for Geosciences and Mineral Resources (KIGAM), Daejong, Korea. Water Resources Research Center, University of Hawaii at Manoa, Honolulu HI, 166 pp
    • Hagedorn, B., Mair, A., Whittier, R.B., El-Kadi, A.I., 2010. Water Budget Analyses and Sustainable Yield Estimation on Jeju Island, Data Collection, Literature Review, and Method Evaluation. Phase I Report, Prepared for Korea Institute for Geosciences and Mineral Resources (KIGAM), Daejong, Korea. Water Resources Research Center, University of Hawaii at Manoa, Honolulu HI, 81 pp

    Conference Proceeding Abstracts Available Upon Request