CAJ | 학술논문

本文基于2007年8月圣帕台风影响台湾海峡期间的厦门湾垂向海流流速剖面观测资料,运用Karman-Prandtl模型统计和分析了流速对数剖面的出现频率和边界层参数(摩阻流速与粗糙长度).结果表明流速剖面满足对数分布出现频率都超过50%,但进行内部一致性原则分析后,流速剖面满足对数分布情况均不足30%.造成流速剖面偏离对数分布的因素主要有:台风、径流、流速加减速、水体分层、底床结构、海底悬沙浓度等等.台风期间的摩阻流速和粗糙长度都大于非台风期间的数值.
본문기우2007년8월골파태풍영향태만해협기간적하문만수향해류류속부면관측자료,운용Karman-Prandtl모형통계화분석료류속대수부면적출현빈솔화변계층삼수(마조류속여조조장도).결과표명류속부면만족대수분포출현빈솔도초과50%,단진행내부일치성원칙분석후,류속부면만족대수분포정황균불족30%.조성류속부면편리대수분포적인소주요유:태풍、경류、류속가감속、수체분층、저상결구、해저현사농도등등.태풍기간적마조류속화조조장도도대우비태풍기간적수치.
A mooring system was used to measure the high-resolution current velocities of different layers above the seabed in Xiamen Bay under the condition of Sepat tropical cyclone conditions in Aug.2007.Using Karman-Prandtl equation,the characteristics of tide-induced bottom boundary layers were analyzed.It indicates that over 50% of the velocity profiles are logarithmic in a tidal cycle and the ratio drops lower than 30% when the internal consistency analysis was adopted.It is showed that tropical cyclone,runoff,acceleration and deceleration of current velocities,stratification,bed structure and suspended sediment concentrations played important roles to the occurrence of logarithmic profile.The shear velocity and roughness length during tropical cyclone conditions were higher than that of normal time.