Research Scientist, Coastal Modeling
Research Scientist, Coastal Modeling


Dr. Nugraha is a coastal modeler expert in the Department of Energy’s (DOE) Pacific Northwest National Laboratory (PNNL). Dr. Nugraha research covers broad areas, including integrated modeling assessment of impacts of climate change and extreme events on coastal infrastructure, nearshore restoration, marine ecosystem (i.e. phytoplankton, zooplankton and eelgrass) and water quality modeling, estuarine and coastal hydrodynamics, sediment transport and bed morphology, and biogeochemical (carbon, nitrogen and silica) cycle in ocean and estuaries. Dr. Nugraha is the key modeler for the development of hydrodynamic and transport model of Salish Sea, and he has long term experience in oceanographic data analysis, signal processing and parameter identification. Dr. Nugraha has also involved in several projects related to data measurements and real-time monitoring of water quality and oceanographic parameters.

Disciplines and Skills

  • Coastal circulation and hydrodynamic modeling
  • Estuary and coastal water quality assessment and modeling
  • Biogeochemical cycling of carbon, nitrogen and other elements in the coastal and marine environments
  • Sediment transport and bed morphology
  • Signal processing and parameter identification


  • Postdoctoral Associate, Tokyo University of Marine Science and Engineering, 2012-2014
  • Postdoctoral Associate, Saga University, 2010-2012
  • Ph.D., Marine Science, Université de Bretagne Occidentale, 2010
  • M.S., Marine Science, Vrije Universiteit Brussel, 2006
  • B.S., Oceanography, Bandung Institute of Technology, 2003

Affiliations and Professional Service

  • American Geophysical Union (AGU)
  • Association for the Sciences of Limnology and Oceanography (ASLO)

Awards and Recognitions

  • European Commission Marie Curie Fellowship, France, 2007–2010
  • Vlaamse Interuniversitaire Raad (VLIR) Scholarship, Belgium, 2004–2006



  • Khangaonkar T.P., A. Nugraha, W. Xu, and K. Balaguru. 2019. "Salish Sea Response to Global Climate Change, Sea Level Rise, and Future Nutrient Loads." Journal of Geophysical Research. C. (Oceans) 124, no. 6:3876-3904. PNNL-SA-143747. doi:10.1029/2018JC014670


  • Khangaonkar T.P., A. Nugraha, W. Xu, W. Long, L. Bianucci, A. Ahmed, and T.M. Mohamedali, et al. 2018. "Analysis of Hypoxia and Sensitivity to Nutrient Pollution in Salish Sea." Journal of Geophysical Research. C. (Oceans) 123, no. 7:4735-4761. PNNL-SA-135617. doi:10.1029/2017JC013650
  • Nugraha A., and T.P. Khangaonkar. 2018. "Detailed Hydrodynamic Feasibility Assessment for Leque Island and Zis a Ba Restoration Projects." Journal of Marine Science and Engineering 6, no. 4:Article No. 140. PNNL-SA-141524. doi:10.3390/jmse6040140


  • Khangaonkar T.P., A. Nugraha, S. Hinton, D.R. Michalsen, and S.H. Brown. 2017. "Sediment Transport into the Swinomish Navigation Channel, Puget Sound-Habitat Restoration versus Navigation Maintenance Needs." Journal of Marine Science and Engineering 5, no. 2:Article No. 19. PNNL-SA-125518. doi:10.3390/jmse5020019


  • Czamanski M., Nugraha A., Pondaven P., Lasbleiz M., Masson A., Caroff N., Bellail R., Tréguer P. 2011. Carbon, nitrogen and phosphorus elemental stoichiometry in aquacultured and wild–caught fish and consequences for pelagic nutrient dynamics. Marine Biology 158: 2847–2862.


  • Nugraha A., Pondaven P., Tréguer P. 2010. Influence of consumer-driven nutrient recycling on primary production and the distribution of N and P in the ocean. Biogeosciences 7: 1285–1305.