中国海域浮游硅藻钟形中鼓藻Bellerochea orologicalis Stosch初步研究

PRELIMINARY STUDY ON BELLEROCHEA HOROLOGICALIS STOCH IN CHINA SEA AREA

我国迄今已记录的中鼓藻属中只有一种——锤状中鼓藻Bellerochea malleus(Bright- well)Van Heurck有详细报导,作者在中国海域进行浮游生物取样时采到本属的另一种钟形中鼓藻Bellerochea horologicalis Stosch,1977.对本种与锤状中鼓藻的重要区别,以及本种的细胞形态、结构、生态习性与分布进行了描述。

The governing equations are derived for regular wave propagation incorporatingmulti-transformation factors such as water current （current factor）, nonlinear dispersion effect （nonlinear factor）, rapidly varying topography effect （topography factor）, energy loss due to bottom friction （friction factor）, refraction, diffraction and wave breaking on the basis of Kirby＇s mild-slope equation with water current. The determination method of current factor, nonlinear factor, friction factor and topography factor is introduced. Based on the derived equations have many advantages： 1） The difficulties in soling the wave potential functions are avoided and the boundary value problems of ellipse are transformed into initial value problems;2） The wave height and direction can be directly solved;3） They can be solved by using a finite difference scheme with no restrictions on the spatial step, therefore are applicable to wave field calculation for large coastal areas;4） The equations incorporate comprehensively multi-factors of wave transformation and are more reasonable. 5） They can deal with wave breaking problems easily.