首页 | 本学科首页   官方微博 | 高级检索  
     检索      

上海岸滩动力泥沙条件的年周期变化及其与滩均高程的统计显示
引用本文:杨世伦,赵庆英,丁平兴,朱骏.上海岸滩动力泥沙条件的年周期变化及其与滩均高程的统计显示[J].海洋科学,2002,26(2):37-41.
作者姓名:杨世伦  赵庆英  丁平兴  朱骏
作者单位:华东师范大学河口海岸动力地貌动力沉积国家综合实验室上海,200062
基金项目:国家自然科学基金资助项目40076027号,国家杰出青年基金资助项目49825161号,教育部高校骨干教师资助计划项目部分成果
摘    要:统计得出长江口口门附近和杭州湾北岸各3个断面全年各月的平均海平面、潮差、向岸风频率、向岸风风速、向岸风指数(频率和风速的乘积)、离岸风频率、离岸风风速、离岸风指数、各风向平均风速、6级以上大风日数、长江入海流量、长江入海输沙量和近岸水域含沙量等13个动力泥沙要素及滩地平均高程的年变化特征。采用线性回归和多元回归方法,对月均滩高和动力泥沙间关系做相关分析。结果表明:(1)海平面、潮差、向(离)岸风频率、向(离)岸风指数、长江入海流量和输沙量、近岸水域含沙量以及滩均高程都有明显的年周期变化规律;(2)除口门内的1个断面(C)外、其他断面的月均滩面高程均同海平面、潮差和长江来水来沙条件有较明显的负相关显示,同近岸水域含沙量有较明显的正相关显示;(3)风(浪)虽是潮滩短期(数天至数周)冲淤循环的控制因子,但在以“月均高程”为单元的年周期中,其信息显示受到其他因子的干扰而不够显著。由于某些动力泥沙因子间本身具有良好的相关性,它们同滩高间的相关关系有些是假象,这反映了纯数学方法的局限性和运用动力地貌、动力沉积学知识进行机制解释的必要性。结论有:淤泥质潮滩年周期冲淤变化的影响机制远较砂砾质海滩复杂;长江口口门附近和杭州湾北岸潮滩月均高程的年周期变化主要受岸外水体含沙量和海平面等因子控制。

关 键 词:动力泥沙  岸滩演变  统计关系  上海海岸  年周期变化  滩均高程
收稿时间:4/2/2001 12:00:00 AM
修稿时间:2001年4月2日

ANNUAL CHANGES IN COASTAL DYNAMIC AND SSC PROCESSES AS WELL AS THEIR STATISTIC RELATIONSHIPS TO INTERTIDAL BED LEVEL: SHANGHAI COAST
YANG Shi-lun ZHAO Qing-ying DING Ping-xing ZHU Jun.ANNUAL CHANGES IN COASTAL DYNAMIC AND SSC PROCESSES AS WELL AS THEIR STATISTIC RELATIONSHIPS TO INTERTIDAL BED LEVEL: SHANGHAI COAST[J].Marine Sciences,2002,26(2):37-41.
Authors:YANG Shi-lun ZHAO Qing-ying DING Ping-xing ZHU Jun
Abstract:Annual changes in sea level, tidal range, wind, riverine discharges and SSC (suspended sediment concentration) were reveled and their statistic relationships with intertidal sediment surface were examined, based on six transects (three in the outer Changjiang River mouth and the others in the northern bank of the Hangzhou Bay). The average intertidal elevation is negatively correlated with sea level and tidal range while positively correlated with nearshore SSC. The effect of wind on annual cycle of average intertidal elevation is not evident although wind is an important factor governing short term erosion/accretion events. The influence of riverine discharges on seasonal cycle of deltaic intertertidal flat is masked by other factors. It is concluded that seasonality on mudflats is more complicated than on beaches.
Keywords:Change in sea-level  Suspended sediment concentration  Coastal evolution  Annual cycle    Shanghai Coast  
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《海洋科学》浏览原始摘要信息
点击此处可从《海洋科学》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号