首页|韩江三角洲1982-2020年海岸线时空演变与影响因素分析

韩江三角洲1982-2020年海岸线时空演变与影响因素分析

扫码查看
本研究利用Landsat遥感影像数据,采用目视解译方法获取了韩江三角洲1982-2020年期间7个时期的海岸线分布,运用岸线类型结构、长度和端点变化速率(EPR)等指标分析韩江三角洲岸线的时空演变特征,在此基础上探讨了岸线演变的影响因素.结果表明:1982-2020年期间,韩江三角洲岸线长度共增加了51.90 km,岸线总长度的增加主要源于人工岸线和生物岸线的增长.韩江三角洲岸线总体上表现为向海推进,平均向海推进距离为164.55 m,端点变化速率平均值为4.35 m/a.向海推进岸段主要分布于榕江河口至莱芜岛和海门角一带,侵蚀后退岸段主要分布于莲阳河口至黄厝草溪河口一带.向海推进主要由围填海和滨海工业设施建设导致,蚀退的原因主要是风浪作用引起的沙坝向岸运移.韩江三角洲岸线主要受相对海平面变化、入海河流输沙变化、风暴潮活动、水动力作用和海岸带人类活动共同影响,主控因素是海岸带人类活动.
Spatiotemporal evolution and influencing factors of the coastlines in Hanjiang Delta from 1982 to 2020
In this study,Landsat remote sensing image data and the visual interpretation method were used to investigate the coastline changes of the Hanjiang Delta in the seven periods from 1982 to 2020.The shoreline spatiotemporal evolution of the Hanjiang Delta was identified by analysis of their coastline type structures,lengths and end point rates.Meanwhile the influencing factors of shoreline evolution were discussed.The results show that the coastline lengths of the Hanjiang Delta increased by 51.90 km from 1982 to 2020,due to the growth of artificial coastline and biological coastline.During this time,the Hanjiang Delta has been prograding seaward more than 164.55 m with the average end point rate of 4.35 m/a.The increased coastal zones mainly distributed from Rongjiang Estuary to Laiwu Island and Haimenjiao,while the eroded coasts distributed from Lianyang Estuary to Huangcuocaoxi Estuary.The seaward coastal areas were mainly caused by reclamation and the industrial construction,which also led to some coastal erosion in the form of sandy bars retreat at the same time.The coastline changes of Hanjiang Delta are chiefly controlled by the relative sea level fluctuation,sediment flux of rivers,storm surge activity,hydrodynamic environment and human activities.Among the factors,human activities play a crucial role.

Hanjiang Deltacoastlinespatiotemporal evolutioninfluencing factors

义家吉、沈成、常建宇、高方艺、王万虎、王洋

展开 >

中国地质调查局海口海洋地质调查中心,海南 海口 570100

中国地质大学(武汉) 海洋学院,湖北 武汉 430074

韩江三角洲 海岸线 时空演变 影响因素

中国地质调查局潮汕海岸带综合地质调查项目

ZD20220607

2024

海洋通报
国家海洋信息中心 国家海洋局北海分局 国家海洋局东海分局 国家海洋局南海分局

海洋通报

CSTPCD北大核心
影响因子:1.07
ISSN:1001-6392
年,卷(期):2024.43(1)
  • 33