期刊
JOURNAL OF HYDRAULIC ENGINEERING
卷 130, 期 4, 页码 360-370出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)0733-9429(2004)130:4(360)
关键词
estuaries; tidal currents; turbulence; turbulent boundary layers; turbulent flow; unsteady flow; density stratification; stratified flow
A high-resolution current profiler (HRCP), which belongs to a pulse-to-pulse coherent Doppler sonar, has been used to measure vertical profiles of turbulence parameters, such as the Reynolds stresses, eddy viscosity, production and dissipation rates, etc., and to test the parametrization of dissipation rate and eddy viscosity. The HRCP and automatic ascending/descending CTD are deployed during the autumn of 2001 for 24 h in a tidal estuary. Reliable velocities along the beams with HRCP are collected with 3 s intervals and a vertical resolution as fine as 0.03 m in the range 0.02-0.98 m above the bottom. Density profiles with the CTD are taken nominally every 30 sec. The turbulent velocity variables depend largely on the tidal phase; the variables during the ebb deviate from those in neutral equilibrium boundary layer. This deviation during the ebb presumably arises from the inactive motion. The stability function S-M in the Mellor-Yamada (M-Y) model is smaller than 0.39 even when the stratification is negligible during the flood. The constant of proportionality B-1 in the dissipation model is larger than 16.6 used in M-Y model. There is room for improving some of the mixing parametrizations in estuarine tidal flows.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据