Abstract
A pulse-to-pulse coherent acoustic Doppler profiler (HR-NDP) operating at 1.5MHz has been used to measure accurate vertical profiles of turbulence parameters, such as Reynolds stresses and eddy viscosity, and to test the parameterization of dissipation rate and stability function Sm in the model of Mellor and Yamada (M-Y). The HR-NDP and STD were deployed during the summer of 2001 for 18 hours in a tidal river. Reliable data with the HR-NDP were corrected with 3s intervals at the cell-size 3cm in the range 10-160cm above the bottom. Density profiles with the STD were taken nominally every 10min. In the near-bottom layer, the production rate deduced from the HR-NDP correlates with the M-Y closure-based dissipation rate, but the empirical constant B1 is larger than that conventionally used in the model. The stability function Sm deduced from the HR-NDP does not agree with Sm of M-Y model.
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