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Kolja Rotzoll

Kolja Rotzoll is a hydrologist with the Pacific Islands Water Science Center in Honolulu, Hawaiʻi.

Kolja Rotzoll is a hydrologist with a focus on combining coastal processes and hydrology. His expertise is in:

  • numerical groundwater-flow and transport modeling of island aquifers (SUTRA, SEAWAT, MODFLOW with SWI2)
  • soil-water balance modeling to estimate spatially distributed recharge (SWB2)
  • time-series analysis of coastal groundwater levels to estimate hydraulic properties, impacts of sea-level rise, and other hydrological processes in Hawai‘i and Guam
  • script-based approach to model-file generation, data analysis, and presentation (Python, MATLAB)



PhD, Geology and Geophysics, University of Hawai‘i at Mānoa, 2007 

MS, Coastal Geosciences and Engineering, University of Kiel, Germany, 2001  

BS, Geography, University of Kiel, Germany, 1999  


Professional Experience

Hydrologist, USGS Pacific Islands Water Science Center, Honolulu, Hawai‘i, 2019–present

Post-doctorate Researcher, Water Resources Research Center, University of Hawai‘i, 2008–2019

Research Assistant, Water Resources Research Center, University of Hawai‘i, 2002–2007

Research Assistant, Coastal Geology, University of Kiel, Germany, 2000–2001