论文部分内容阅读
唐岛湾为半封闭狭长型海湾,水动力条件复杂。对湾内潮间带沉积物进行定点定时取样,并进行粒度测试。分析表明:沉积物以砂和粉砂质砂为主,分选较差,偏度正偏,呈宽峰态;概率累积曲线以两跳一悬式为主。利用粒级—标准偏差曲线研究现代沉积,沉积物中粒径<158.6μm的组分受潮流影响显著,158.6~369.1μm和>369.1μm的粒级组分则分别代表波浪和强水动力如风暴浪等的作用;且通过对各粒径组分的分析认为,粒径<158.6μm的组分中潮汐作用的月周期性最为明显。在狭长型海湾中,潮流水动力强度可能并不大。最后结合相关资料,对唐岛湾内潮坪沉积、潮沟变化及沉积物冲淤变化进行了分析,以期对半封闭狭长型海湾潮间带沉积水动力研究及实施海岸带保护提供基础资料。
Tangdao Bay is a semi-enclosed long bay, with complex hydrodynamic conditions. Time-lapse sampling of intertidal sediments in the bay and particle size testing. The analysis shows that the sediments are dominated by sand and silty sand, with poor sorting, skewness positive and broad kurtosis; and the probability cumulative curve is dominated by two hops and one suspension. In modern sedimentation, grain fractions of <158.6 μm in sediment are studied by means of grain-size-standard deviation curve. Particulate fractions of 158.6-369.1 μm and> 369.1 μm represent waves and strong hydrodynamic forces such as storms Waves and other effects; and through the analysis of the various particle size components, the particle size <158.6μm components of the tidal effect of the most obvious monthly periodicity. In the long and narrow bay, tidal current hydrodynamic strength may not be large. Finally, the related data are used to analyze the changes of the Nei Chaofeng sediments and trenches in the Tangdao Bay and the changes of the sediments. In order to provide the basic data for the study of sedimentary hydrodynamics and the implementation of coastal zone protection in the semi-enclosed long and narrow intertidal bay.