CAJ | 학술논문

利用传统对数分布描述潮流垂向流速分布时，常与现场实测资料有所偏差。考虑到悬沙垂向分布不均造成的水体分层效应，引入水体分层参数对动量传递系数进行修正，将悬沙垂向指数分布公式应用到流速分布计算中，推导出悬沙梯度引起水体分层效应时的垂向流速分布公式。与南黄海辐射沙洲西洋水道实测流速数据的对比分析表明，该分布与实测数据的相关程度明显高于传统对数分布，垂向流速分布结构更加符合实际情况。由于悬沙在水体底层的减阻作用，得到的摩阻流速小于由对数分布得到的摩阻流速，可以真实反映西洋水道内潮流底部的摩阻特性。
이용전통대수분포묘술조류수향류속분포시，상여현장실측자료유소편차。고필도현사수향분포불균조성적수체분층효응，인입수체분층삼수대동량전체계수진행수정，장현사수향지수분포공식응용도류속분포계산중，추도출현사제도인기수체분층효응시적수향류속분포공식。여남황해복사사주서양수도실측류속수거적대비분석표명，해분포여실측수거적상관정도명현고우전통대수분포，수향류속분포결구경가부합실제정황。유우현사재수체저층적감조작용，득도적마조류속소우유대수분포득도적마조류속，가이진실반영서양수도내조류저부적마조특성。
The calculated tidal flow velocity profile that is expressed with the usual logarithmic law always departed from the observed data. Stratified flow effect induced by the uneven distribution of suspended sediment is considered and the flux Richard-son Number is adopted to modify the coefficient of momentum transfer. The power-type vertical distribution of suspended sedi-ment concentration is applied to the derivation of the vertical distribution, in which, the stratified flow effect induced by the gradi-ent of suspended sediment concentration is taken into account. Through the comparison of the calculated and measured data in Xiyang Channel of radial sandbanks, it is concluded that the new formula of vertical velocity distribution reveals better correlation and consistency with measured data in each layer than the usual logarithmic profile, and conforms more to the actual situation. The vertical density stratification owing to the suspended sediment distribution plays a significant role in the vertical velocity pro-file. The friction velocity calculated by the formula is smaller than that by the logarithmic profile, because the presented formula considers drag reduction effect of bottom sediment, which reflects the friction characteristic of the bottom in Xiyang Channel.