Tarang Khangaonkar

Marine Sciences Laboratory
Pacific Northwest National Laboratory
1529 West Sequim Bay Road
Sequim, Washington 98382
tarang.khangaonkar@pnl.gov

Biography

Dr. Khangaonkar is the Technical Group Manager of the Coastal and Water Resources Modeling Group at the PNNL Marine Sciences Laboratory, Battelle. He provides senior leadership to PNNL’s activities in numerical modeling studies related to water quality, hydrodynamics, sediment transport, and fate and transport analysis. He has 19 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 mixing zone and dilution ratio studies providing modeling of near-field and far-field mixing processes, calculations of dissolved oxygen (DO) depletions and sediment deposition, evaluating long-term effluent flushing and pH buffering, and performing diffuser design optimization. Dr. Khangaonkar is currently managing the developments of Watershed/TMDL models for the Lower Deschutes River and the Clackamas Rivers related to temperature, DO, and phytoplankton issues. He is also managing the temperature modeling work in connection with the TMDLs on a number of rivers such as the Pend Oreille River, WA, and the Clackamas, Deschutes, and Willamette Rivers in Oregon. In response to a growing demand by the Puget Sound community for a practical oceanographic modeling tool, to assist with nearshore restoration planning and design, and water quality management, Dr. Khangaonkar and his team have initiated the development of a high resolution 3-D finite volume hydrodynamics and transport model. The Puget Sound Circulation and Transport Model (PS-CTM) is being developed to assist with emergency response and analysis of fish migration pathways. In consultation with U.S. EPA and Washington State Department of Ecology, Dr. Khangaonkar is currently managing the development of a DO and nutrient model of Puget Sound. In collaboration with NOAA- CSDL and U.S. Coast Guard, Dr. Khangaonkar and his team are working towards an Operational Forecast System for Puget Sound.

Research Interests

Hydrodynamics, Hydraulics, Coastal Circulation and Waterwave Propagation
Water Quality Kinetics and Fate and Transport of Pollutants
Sediment Transport and Sediment Deposition Analysis
Coastal and Shoreline Habitat and Fish Passage Restoration
Mixing Zone Sizing/Design and Impact Evaluations
Statistical Data Analysis and Water Quality Based Permitting
Ocean/Coastal Engineering

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

Selected Publications

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).

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 River. PNNL-16482, 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 Report. PNNL-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.