弧形海岸中间过渡带海滩剖面的地貌动态分析  

ANALYSIS ON GEOMORPHOLOGICAL DYNAMICS OF BEACH PROFILE OF INTERMEDIATE TRANSITIONAL ZONE IN ARC-SHAPED SHORE

作　　者：陈子燊[1] 李春初[1] 

机构地区：[1]中山大学地理系

出　　处：《海洋科学》1990年第2期6-12,共7页Marine Sciences

摘　　要：本文根据海滩剖面实测数据,结合海滩物质组成、波浪观测和地貌特征等,应用R型因子分析、功率谱分析与交叉谱分析等方法分析了粤西水东弧形海湾中间过渡地带海滩剖面的地貌动态。Based on the repeatly measured profile data, and beach sand samples, morphological features and wave observation, the geomorphological dynamics of beach profile in intermediate transitional zone of the arc-shaped Bay of Shuidong in western Guangdong province was dealt with by statistical methods.The result of R-factor analysis of the profile data extracted three factors which accounted for 90% of the total variance of the original data. The first factor showed that the transformation between the beach berm located in the mid-tidal zone and the subaqueous ridge-tunnel below the low-tidal zone, which represented the most important process of the beach profile. The second factor indicated the effect of the backwash process on the beach profile slope. The third represented the cutting action of typhoon waves in backshore.The result of power spectrum estimation of the beach volume showed about 20 days quasiperiod oscillation of the beach in this zone. The cross spectrum estimation between beach volume and wave energy indicated about 10 days lag in response of this beach to the wave variations.

关 键 词：海岸 过渡带 海滩 剖面 地貌 

分 类 号：P737.1[天文地球—海洋地质]