淤泥质海滩泥沙交换输移形式及其判据的探讨

A Discussion on Sediment Exchange and Transport Formation in Mudflats and its Criterion

本文应用协方差分析结果揭示淤泥质海滩泥沙输移的两种形式:以横向为主的泥沙输移形式,以垂向和横向掺混交换并存的泥沙交换输移形式.前者反映出潮流作用下泥沙的运移.相应的海滩发生淤积;后者是波浪和潮流作用下泥沙的交换输移形式,相应的海滩发生侵蚀.此外,又采用参数估计的方法对参与交换的泥沙进行粒径区间估计,作为判断淤泥质海滩泥沙是否运移扩散的一种判据.

The paper intends to indicate two patterns of the mudflats sediments movement using results of the covarianee analysis. One is a type in which the mudflats sediments are transported mainly in lateral by the rtidal currents, results the mudflats deposition. The other is a type in which the mudflats sediments are exchanged not only in vertieal but also transported in lateral by the actiotos of waves and tidal currents, and the erosion of the mudflats occurs. In addition, the confidence interval of mean grain size of the moved sediments is estimated using a criterion whether the mudflats sediments are moved or not.