河口变形效应与涌潮的形成

ON GENERATION OF BORES IN SLOPING AND NARROWING ESTUARIES OF ARBITRARY SHAPE

作者采用非线性潮波方程,假定河口的宽度B(x)和深度h(x)是任意可微函数,导出了涌潮发生的条件,并讨论了各种变形情况下涌潮的形成。得出结论是,在涌潮形成过程中起决定作用的是浅水非线性效应,而河口变形效应则是起促进作用的。

Assuming that the breadth B(x) and depth h(x) of estuaries are arbitrary differentiabJe functions of position, we analyse the shallow water equations. The bore general ng condition in an estuary has been obtained. In light of the condition, we discuss the generation of bores in several estuaries of varying shapes. It is shown that the shallow water nonlinear effect is the determinant for the generation of a bore, and the varying shape effect of estuary |S a promoter.