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Marine Sciences Division

Tarang Khangaonkar

Tarang Khangaonkar

Marine Sciences Laboratory
Pacific Northwest National Laboratory
1529 West Sequim Bay Road
Sequim, Washington 98382

Biography

Dr. Khangaonkar is the Technical Manager of the Integrated Coastal Ocean Modeling Group at the PNNL Marine Sciences Laboratory, Battelle. He provides senior leadership to PNNL’s activities in numerical modeling studies related to coastal ocean hydrodynamics, water quality, sediment transport, and fate and transport analysis. He has 22 years of experience with various types of models capable of circulation, toxics fate and transport, and water quality kinetics. He has been involved with a number of water quality management studies providing modeling of temperature, calculations of dissolved oxygen (DO) depletions and sediment deposition, evaluating long-term effluent flushing and pH buffering, and performing temperature and diffuser design optimization. In response to a growing demand by the Puget Sound community for a practical oceanographic modeling tool, Dr. Khangaonkar and his team have developed a high resolution 3-D finite volume hydrodynamic and transport model. In collaboration with U.S. EPA and Washington State Department of Ecology, Dr. Khangaonkar is overseeing the development of a comprehensive biogeochemical component for the Salish Sea region of the Pacific Northwest as part of ecosystem modeling in connection with nutrient pollution management, sea level rise, climate change, and ocean acidification. The tool originally developed to assist with nearshore restoration planning and design, and water quality management is also being considered for emergency response, analysis of fish migration pathways and for assessment of climate change effects. Dr. Khangaonkar and his team are working towards an Operational Forecast System for Puget Sound and the Pacific Northwest coastal waters.

Research Interests

  • Coastal circulation and hydrodynamic modeling
  • Effluent mixing and fate and transport modeling
  • Water quality and biogeochemical processes modeling
  • Toxics fate and transport modeling
  • Climate change and sea level rise
  • Ocean acidification
  • Sediment transport and littoral processes
  • Integrated modeling of riverine, floodplain, estuarine, and coastal watersheds

Education and Credentials

  • Postdoctoral Associate. Coastal and Oceanographic Engineering Department, Univ. of Florida, 1990 - 1991
  • Ph.D., Applied Marine Physics/Ocean Engineering, University of Miami, 1990
  • M.S., Ocean Engineering, University of Miami, 1988
  • B.S., Naval Architecture, Indian Institute of Technology, 1986

Affiliations and Professional Service

  • American Geophysical Union
  • American Society of Civil Engineers

Awards and Recognitions

  • Registered Professional Engineer, Civil (#32167), Washington State of Civil Engineers

PNNL Publications

2017

  • Khangaonkar TP, W Long, and W Xu. 2017. "Assessment of Circulation and Inter-Basin Transport in the Salish Sea including Johnstone Strait and Discovery Islands Pathways." Ocean Modelling 109:11-32.  doi:10.1016/j.ocemod.2016.11.004

2016

  • Gill GA, LJ Kuo, CJ Janke, J Park, RT Jeters, GT Bonheyo, HB Pan, C Wai, T Khangaonkar, L Bianucci, JR Wood, MG Warner, SM Peterson, DG Abrecht, R Mayes, C Tsouris, Y Oyola, JE Strivens, NJ Schlafer, RS Addleman, W Chouyyok, S Das, J Kim, KO Buesseler, C Breier, and E D'Alessandro. 2016. "The Uranium from Seawater Program at the Pacific Northwest National Laboratory: Overview of Marine Testing, Adsorbent Characterization, Adsorbent Durability, Adsorbent Toxicity, and Deployment Studies." Industrial and Engineering Chemistry Research 55(15):4264-4277.  doi:10.1021/acs.iecr.5b03649
  • Khangaonkar T, W Long, B Sackman, T Mohamedali, and AF Hamlet. 2016. "Sensitivity of Circulation in the Skagit River Estuary to Sea Level Rise and Future Flows." Northwest Science 90(1):94-118.  doi:10.3955/046.090.0108

2015

2014

  • Wang T, T Khangaonkar, W Long, and GA Gill. 2014. "Development of a Kelp-type Structure Module in a Coastal Ocean Model to Assess the Hydrodynamic Impact of Seawater Uranium Extraction Technology." Journal of Marine Science and Engineering 2(1):81-92.  doi:10.3390/jmse2010081

2013

  • Khangaonkar T, and T Wang. 2013. "Potential alteration of fjordal circulation due to a large floating structure-Numerical investigation with application to Hood Canal basin in Puget Sound." Applied Ocean Research 39:146-157.  doi:10.1016/j.apor.2012.11.003

2012

  • Kim TY, and T Khangaonkar. 2012. "An offline unstructured biogeochemical model (UBM) for complex estuarine and coastal environments." Environmental Modelling & Software 31(1):47-63.  doi:10.1016/j.envsoft.2011.11.010
  • Khangaonkar T, BS Sackmann, W Long, T Mohamedali, and M Roberts. 2012. Puget Sound Dissolved Oxygen Modeling Study: Development of an Intermediate Scale Water Quality ModelPNNL-20384 Rev 1, Pacific Northwest National Laboratory, Richland, WA. 
  • Khangaonkar T, BS Sackmann, W Long, T Mohamedali, and M Roberts. 2012. "Simulation of annual biogeochemical cycles of nutrient balance, phytoplankton bloom(s), and DO in Puget Sound using an unstructured grid model ." Ocean Dynamics 62(9):1353-1379.  doi:10.1007/s10236-012-0562-4
  • Yang Z, T Wang, T Khangaonkar, and SA Breithaupt. 2012. "Integrated Modeling of Flood Flows and Tidal Hydrodynamics over a Coastal Floodplain ." Environmental Fluid Mechanics 12(1):63-80.  doi:10.1007/s10652-011-9214-3

2011

  • Breithaupt SA, and T Khangaonkar. 2011. "Effects of Wetland Restoration on Floodplain Hydrodynamics under Extreme Flooding Conditions." Ecological Restoration 29(1-2):161-172.  doi:10.3368/er.29.1-2.161
  • Khangaonkar T, and Z Yang. 2011. "A High Resolution Hydrodynamic Model of Puget Sound to Support Nearshore Restoration Feasibility Analysis and Design." Ecological Restoration 29(1-2):173-184.  doi:10.3368/er.29.1-2.173
  • Khangaonkar T, Z Yang, TY Kim, and M Roberts. 2011. "Tidally averaged circulation in Puget Sound sub-basins: Comparison of historical data, analytical model, and numerical model." Estuarine, Coastal and Shelf Science 93(4):305-319.  doi:10.1016/j.ecss.2011.04.016
  • Yang Z, T Khangaonkar, and T Wang. 2011. "Use of Advanced Meteorological Model Output for Coastal Ocean Modeling in Puget Sound ." International Journal of Ocean and Climate Systems 2(2):101-117. 

2010

  • Kim T, RG Labiosa, T Khangaonkar, Z Yang, C Chen, J Qi, and C Cerco. 2010. "Development and evaluation of a coupled hydrodynamic (FVCOM) and water quality model (CE-QUAL-ICM)." In Proceedings of the 11th International Conference on Estuarine and Coastal Modeling, November 4-6, 2009, Seattle, Washington, ed. ML Spaulding, pp. 373-388.  American Society of Civil Engineers, Reston, VA.  doi:10.1061/41121(388)23
  • Wang T, Z Yang, and T Khangaonkar. 2010. Development of a Hydrodynamic and Transport model of Bellingham Bay in Support of Nearshore Habitat Restoration PNNL-19347, Pacific Northwest National Laboratory, Richland, WA. 
  • Yang Z, and T Khangaonkar. 2010. "Multi-scale modeling of Puget Sound using an unstructured-grid coastal ocean model: from tide flats to estuaries and coastal waters." Ocean Dynamics 60(6):1621-1637.  doi:10.1007/s10236-010-0348-5
  • Yang Z, KL Sobocinski, DW Heatwole, T Khangaonkar, RM Thom, and R Fuller. 2010. "Hydrodynamic and Ecological Assessment of Nearshore Restoration: A Modeling Study." Ecological Modelling 221(7):1043-1053.  doi:10.1016/j.ecolmodel.2009.07.011
  • Yang Z, T Khangaonkar, M Calvi, and K Nelson. 2010. "Simulation of Cumulative Effects of Nearshore Restoration Projects on Estuarine Hydrodynamics ." Ecological Modelling 221(7):969-977.  doi:10.1016/j.ecolmodel.2008.12.006
  • Khangaonkar T, Z Yang, SH Geerlofs, and A Copping. 2010. "Overland Tidal Power Generation Using Modular Tidal Prism." In Estuarine and Coastal Modeling: Proceedings of the 11th International Conference, November 4-6, 2009, Seattle, WA, ed. ML Spaulding, pp. 466-477.  American Society of Civil Engineers, Reston, VA.  doi:10.1061/41121(388)28
  • Yang Z, T Khangaonkar, and T Wang. 2010. Assessment of Energy Removal Impacts on Physical Systems: Hydrodynamic Model Domain Expansion and Refinement, and Online Dissemination of Model ResultsPNNL-19882, Pacific Northwest National Laboratory, Richland, WA. 
  • Yang Z, T Khangaonkar, RG Labiosa, and T Kim. 2010. Puget Sound Dissolved Oxygen Modeling Study: Development of an Intermediate-Scale Hydrodynamic ModelPNNL-18484, Pacific Northwest National Laboratory, Richland, WA. 

2009

  • Yang Z, and TP Khangaonkar. 2009. "Modeling Tidal Circulation and Stratification in Skagit River Estuary Using an Unstructured Grid Ocean Model ." Ocean Modelling 28(1-3):34-49. (special issue). 
  • Yang Z, T Khangaonkar, JM Chase, and T Wang. 2009. "Puget Sound Operational Forecast System - A Real-time Predictive Tool for Marine Resource Management and Emergency Responses." In Proceedings of the 11th International Conference on Estuarine and Coastal Modeling, November 4-6, 2009, Seattle, WA, ed. ML Spaulding, pp. 356-372.  American Society of Civil Engineers (ASCE), Reston, VA.  doi:10.1061/41121(388)22

2008

  • Yang Z, and TP Khangaonkar. 2008. "Modeling of Coastal Effluent Transport: an Approach to Linking of Far-field and Near-field Models." Acta Oceanologica Sinica 27:21-30. 
  • Yang Z, and TP Khangaonkar. 2008. "Modeling of Salt Intrusion, Intertidal Mixing, and Circulation in a Braided Estuary." In Surface Water Modeling, vol. 52, pp. 171-180.  Journal of Coastal Research, Boca Raton, FL. 
  • Burkholder BK, GE Grant, R Haggerty, TP Khangaonkar, and PJ Wampler. 2008. "Influence of hyporheic flow and geomorphology on temperature of a large, gravel-bed river, Clackamas River, Oregon, USA." Hydrological Processes 22(7):941-953. 
  • Khangaonkar TP, Z Yang, J Paik, and F Sotiropoulos. 2008. "Simulation of Hydrodynamics at Stratified Reservoirs Using a Staged Modeling Approach." Journal of Coastal Research. JCR (Special Issue: 52):79-86. 
  • Khangaonkar TP, and Z Yang. 2008. "DYNAMIC RESPONSE OF STREAM TEMPERATURES TO BOUNDARY AND INFLOW PERTURBATION DUE TO RESERVOIR OPERATIONS." River Research and Applications 24(4):420-433.  doi:10.1002/rra.1088
  • Tang H, J Paik, F Sotiropoulos, and TP Khangaonkar. 2008. "Three-Dimensional Numerical Modeling of Initial Mixing of Thermal Discharges at Real-Life Configurations." Journal of Hydraulic Engineering 134(9):1210-1224.  doi:10.1061/(ASCE)0733-9429(2008)134:9(1210)

2007

  • Vavrinec J, III, WH Pearson, NP Kohn, JR Skalski, C Lee, KD Hall, BA Romano, MC Miller, and TP Khangaonkar. 2007. Laboratory Assessment of Potential Impacts to Dungeness Crabs from Disposal of Dredged Material from the Columbia RiverPNNL-16482, Pacific Northwest National Laboratory, Richland, WA. 
  • Yang Z, and TP Khangaonkar. 2007. Development of a Hydrodynamic Model of Puget Sound and Northwest Straits PNNL-17161, Pacific Northwest National Laboratory, Richland, WA. 
  • Frick WE, TP Khangaonkar, AC Sigleo, and Z Yang. 2007. "Estuarine-ocean exchange in a North Pacific estuary: comparison of steady state and dynamic model." Estuarine, Coastal and Shelf Science 74(1-2):1-11.  doi:10.1016/j.ecss.2007.02.019
  • Whelan G, WD Millard, GM Gelston, TP Khangaonkar, MA Pelton, DL Strenge, Z Yang, C Lee, C Sivaraman, AJ Stephan, BL Hoopes, and KJ Castleton. 2007. "Using FRAMES to Manage Environmental and Water Resources." In Proceedings of the World Environmental and Water Resources Congress 2007: Restoring our Natural Habitat, May 15-19, 2007, Tampa, Florida, USA, ed. Karen C. Kabbes.  American Society of Civil Engineers, Reston, VA.  doi:10.1061/40927(243)130

2006

  • Khangaonkar TP, SA Breithaupt, and FC Kristanovich. 2006. "Restoration of Hydrodynamic and Hydrologic Processes in the Chinook River Estuary, Washington - Feasibility Assessment ." In Estaurine and Coastal Modeling Proceedings of the 9th International Conference held in Charleston, SC, Oct. 31-Nov.2, 2005, ed. M.L. Spaulding, pp. 734-751.  American Society of Civil Engineers, Reston, VA. 
  • Khangaonkar TP, SA Breithaupt, and FC Kristanovich. 2006. "Restoration of Hydrodynamic and Hydrologic Processes in the Chinook River Estuary, Washington - Feasibility Assessment." In 9th International Conference on Estuarine Coastal Modeling Conference, ed. ML Spaulding.  American Society of Civil Engineering, New York, NY. 
  • Lee C, Z Yang, TP Khangaonkar, and AB Divers. 2006. "Application of a Hydrodynamic Model for Assessing the Hydraulic Capacity and Flow Field at Willamette Falls Dam, Oregon." In Estuarine and Coastal Modeling. Proceedings of 9th International Conference held in Charleston, SC, Oct.31-Nov. 2, 2005, ed. M.L. Spaulding, pp. 788-805.  American Society of Civil Engineers, Reston, VA. 
  • Whelan G, WD Millard, GM Gelston, MA Pelton, Z Yang, DL Strenge, C Lee, C Sivaraman, MJ Simpson, JK Young, TP Khangaonkar, TR Downing, BL Hoopes, and LE Hachmeister. 2006. Rapid Risk Assessment: FY05 Annual Summary ReportPNNL-15697, Pacific Northwest National Laboratory, Richland, WA. 
  • Yang Z, H Liu, and TP Khangaonkar. 2006. "Development of a Hydrodynamic Model for Skagit River Estuary for Estuarine Restoration Feasibility Assessment." In Estuarine and Coastal Modeling: Proceedings of the 9th International Conference held in Charleston, SC, Oct. 31-Nov.2, 2005, ed. M.L. Spaulding, pp. 752-767.  American Society of Civil Engineers, Reston, VA. 

2005

  • Khangaonkar TP, Z Yang, C DeGasperi, and K Marshall. 2005. "Modeling Hydrothermal Response of a Reservoir to Modifications at a High-Head Dam." Water International 30(3):378-388. 
  • Yang Z, H Liu, and TP Khangaonkar. 2005. "Development of a Hydrodynamic Model for Skagit River Estuary for Estuarine Restoration Feasibility Assessment." In The 9th International Conference on Estuarine and Coastal Modeling.  American Society of Civil Engineers, Reston, VA. 

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