沿岸流流速的理论研究

THEORETICAL STUDY ON LONGSHORE CURRENT VELOCITY

海岸工程中迫切需要解决的一个问题是沿岸流问题,沿岸流是近岸泥沙运动的主要动力因素。本文采用一阶准孤立波理论、普朗特的紊动长度理论和线性底摩擦应力公式得到了斜向人射波在顺直平整岸滩上的沿岸流流速的解答,这个解答考虑了增水和回流的影响。与朗吉德·希金斯(Longuet Higgins)的解答不同,本解答没有不确定的参数,且本文的解答与实测资料具有较好的一致性。

By using the fitst—order pseud—solitary wave for described nearshore region wave, Prandtle turbulent hypothesis for lateral mixing and linear bottom frictional stress, a solution is presented for longshore current velocity. The longshore current velocities predicted by author's solution agree well with experimental results by Galvin and Eagleson and Mizuguchi and Horikawa.