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transport, scour, numerical and physical hydraulic modeling, floods and droughts, and river basin <br />water supply models. <br />Select Publications: <br />Shen, H. W. and Garbrecht, J. (1988) The physical framework of the dependence between <br />channel flow hydrographs and drainage network morphometry Hydrolog. Proc., 2, 337. <br />Shen, H. W. and Mendoza, C. (1990) Investigation of turbulent flow over dunes. J. of Hyd. Eng., <br />116, 459. <br />Shen, H. W., Koch, G. J., and Obeysekera, J. Physically based flood features and frequencies. <br />(1990) J. Hyd. Eng., 116, 494. <br />Shen, H. W., Fehlman, H. M., and Mendoza, C. (1990) Bed form resistances in open channel <br />flows. J. of Hyd. Eng., 116, 799. <br />Shen, H. W., and Jan, C. -D. (1990) Longitudinal and surface profiles of granular flows. Proc. <br />Hyd. and Hydrol. of Arid Lands, Amer. Soc. Civil Eng. Hydraulic Division Annual Meeting, 530. <br />Shen, H. W. and Mendoza, C. (1990) Investigation of turbulent flow over dunes. J. of Hyd. Eng., <br />116, 459. <br />Shen, H. W., Koch, G. J., and Obeysekera, J. (1990) Physically based flood features and <br />frequencies. J. Hyd. Eng., 116, 494. <br />Shen, H. W., Fehlman, H. M., and Mendoza, C. (1990) Bed form resistances in open channel <br />flows. J. of Hyd. Eng., 116, 799. <br />Shen, H. W., and Jan, C. -D. (1990) Longitudinal and surface profiles of granular flows. Proc. <br />Hyd. and Hydrol. of Arid Lands, Amer. Soc. Civil Eng. Hydraulic Division Annual Meeting, 530. <br />Geomorphology /Sediment Issues <br />JIM S. O'BRIEN, Ph.D. <br />FLO -21) Software, Inc. <br />Tetra Tech, ISG <br />P.O. Box 66 y) Nutrioso, AZ 85932 J <br />FL02D learthlink.net <br />(520) 339 -1935 (weekends) (505) 835 -3797 (weekdays) <br />(970) 453 -6394 FLO /TetraTech —Breckenridge, CO <br />M.S. University of Colorado,degrees in aerospace and civil engineering <br />Ph.D. Colorado State University, civil engineering hydraulics program <br />B.S. St. Louis University, aerospace engineering <br />Interests <br />Dr. O'Brien is President of the FLO -21) Software, Inc. and a senior hydraulic engineer with Tetra Tech, ISG. <br />Dr O'Brien is creator of the FLO -2D model for predicting flow hydraulics on unconfined river floodplains <br />and alluvial fans. He is the author of numerous articles on hydrology, hydraulics, flood routing and hyper - <br />concentrated sediment flows. He is a license professional engineer in four states. <br />