Journal of JSCE, Vol. 1, 194-213, 2013 THREE-DIMENSIONAL MODELING OF HYDRODYNAMICS AND DISSOLVED OXYGEN TRANSPORT IN TONE RIVER ESTUARY Xiaofei XU1, Tadaharu ISHIKAWA2 and Takashi NAKAMURA3 1 School of Chemical Machinery, Dalian University of Technology (No.2 Linggong Road, Gangjingzi District, Dalian City, Liaoning Province, 116024, China) E-mail:
[email protected] 2Fellow Member of JSCE, Professor, Dept. Environmental Science & Technology, Tokyo Institute of Technology (Nagatsuta 4259, Midori-ku, Yokohama, 226-8502, Japan) E-mail:
[email protected] 3Member of JSCE, Associate Professor, Dept. Environmental Science & Technology, Tokyo Institute of Technology (Nagatsuta 4259, Midori-ku, Yokohama, 226-8502, Japan) E-mail:
[email protected] A three-dimensional hydrodynamic model for simulating estuarine dynamics has been developed. The model, called CIP-Soroban flow solver, has been specifically designed for reproducing the current and salinity fields in density-stratified water bodies with a free surface. It is based on the Constrained Inter- polation Profile (CIP) scheme and the Soroban computational grid system. Simulations of the time-dependent current and salinity fields of the Tone River Estuary have been performed using this model. Two periods are used to examine the predictive capability of the model. The first was in August 1997, which produced extensive field data related to vertical profiles of salinity, which showed evident changes in salinity intrusion processes between spring and neap tides; and the second in August 2001, which pro- duced sufficient data associated with continuous measurements of vertical profiles of velocity, which showed characteristic residual flows averaged over ten tidal cycles.