围垦工程影响下的淤涨型潮滩演化:以江苏弶港潮滩为例  

The geomorphologic response of accreting intertidal flat to reclamation: a case from Jianggang, Jiangsu

作　　者：李明亮[1,2] 杨磊[1,2] 龚绪龙[1,2] 薛文勇[1] 杨旸[3] 石勇[4] 汪亚平[3] LI Ming-liang YANG Lei GONG Xu-long XUE Wen-yong YANG Yang SHI Yong WANG Ya-ping(Geological Survey of Jiangsu Province, Nanjing 210018, China Key Laboratory of Earth Fissures Geological Disaster, Ministry of Iand and Resources, Nanjing 210018, China School of Geographic and Oceanic Sciences, Nanjing University, Nanjing 210023, China National Ocean Technology Center, Tianjing 300112, China)

机构地区：[1]江苏省地质调查研究院,江苏南京210018 [2]国土资源部地裂缝地质灾害重点实验室,江苏南京210018 [3]南京大学地理与海洋科学学院,江苏南京210023 [4]国家海洋技术中心,天津300112

出　　处：《海洋通报》2016年第6期683-693,共11页Marine Science Bulletin

基　　金：中国地质调查局项目(1212011220005);国家自然科学基金(41376044);江苏省自然科学基金(BK2011012)

摘　　要：通过对受到围垦工程影响的江苏弶港海岸两条潮滩剖面的多期高精度实测高程及沉积物粒度数据进行分析,探讨淤涨型潮滩剖面对围垦工程的响应特征及剖面演化模式。结果表明,在物源充足的淤涨型潮滩围垦,可导致沉积物在围垦堤附近海域快速堆积、沉积物粒径变细;离海堤越远,沉积速率及沉积物粒度参数的变化越不显著。围垦堤附近海域是潮滩低能区,沉积物在此汇聚,造成潮滩剖面凸点的向岸迁移及双凸型剖面的塑造。另外,大型潮沟及其迁移也是影响剖面发育的重要因素。未来需结合海平面变化,研究围垦背景下的长周期潮滩演化趋势。On the basis of the high-resolution elevation and grain size data collected from intertidal flats at Jianggang （Jiangsu） coast, we distinguish the geomorphic response of accreting intertidal flat to reclamation, and also proposed a conceptual model. The results show that reclamation at upper accreting intertidal flat with sufficient sediment supply could resuh in fast fine sediment accumulation outside the sea wall. However, sedimentation rates and sediment grain size parameters change none significant far from the sea wall. The upper intertidal flat changes into low energy status due to the sea wall construction, which results in sediment accumulation with a maximum sedimentation rate. Thus, the convex point of tidal flat profile would move towards sea wall and then a dual convex profile could develop. In addition, large-scale tidal creeks and their migration are important factors changing the profile shape of intertidal flat. In the future, the long-term evolution of intertidal flat due to sea level changes is required the long-term climate change study.

关 键 词：围垦工程 淤涨型潮滩 沉积物输运 沉积速率 潮滩剖面 

分 类 号：P748[天文地球—海洋科学]