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| 人类活动影响下的1989—2019年江苏中部海岸线变化特征研究 |
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李明亮1,2,3, 吴曙亮1,2, 龚绪龙1,2, 杨磊1,2, 苟富刚1,2, 李进1,2
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1.江苏省地质调查研究院, 江苏 南京 210018;2.国土自然资源部 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
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| 摘要: |
| 海岸线是海岸带地区重要的自然资源，也是海洋生态系统的重要组成部分。通过分析江苏中部海岸1989—2019年海岸线变化特点、潮滩围垦特征以及围填海潮滩断面地貌响应过程，研究人类围填海活动对海岸线演变的影响机制。结果表明，近30 a来江苏中部海岸线变化具有明显的时空不对称性，变化速率变异系数空间差异显著，岸线的向海推进是在人类围填海活动驱动下的被动变化过程，二者相关性系数达93%。另外，在江苏中部海岸围填海对潮滩上部有促淤作用，但也引起潮间带下部潮滩的侵蚀，这种“上淤下侵”的潮滩地貌格局对未来海岸线资源的可持续利用和保护提出了挑战。 |
| 关键词: 江苏中部海岸 围填海 海岸线变化 潮滩断面 盐沼湿地 |
| DOI：10.11759/hykx/20210512003 |
| 分类号:P748 |
| 基金项目:江苏沿海地区综合地质调查项目（20120223）；中国地质调查局项目（1212011220005）；连云港城市地质调查项目（20170821）；江苏省自然资源发展专项（JSZRHYKJ202106） |
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| Characteristics of coastline change under the influence of human activities in central Jiangsu Province from 1989 to 2019 |
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LI Ming-liang1,2,3, WU Shu-liang1,2, GONG Xu-long1,2, YANG-lei1,2, GOU Fu-gang1,2, LI Jin1,2
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1.Geological Survey of Jiangsu Province, Nanjing 210018, China;2.Key Laboratory of Earth Fissures Geological Disaster, Ministry of Natural Resources, Nanjing 210018, China;3.School of Geographic and Oceanic Sciences, Nanjing University, Nanjing 210023, China
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| Abstract: |
| The coastline is an important natural resource in coastal areas,which is also a crucial part of the coastal ecosystem.By analyzing the characteristics of coastline change processes from 1989 to 2019 in central Jiangsu province and the reclamation processes and tidal flat profile morphological response process to human tidal reclamation,this work studies the influence of human reclamation on the coastline evolution.Results show that the change in the coastline has an obvious asymmetry in time and space and the coefficient of variation of accretion speed is significantly different in different parts of the coast.All the above data prove that the change in the coastline is a passive process driven by human reclamation,and the two have positive relativity as high as 93%.However,tidal reclamation has the effect of cement accretion and can also cause the erosion of the lower tidal flat.This “accretion in the higher part and erosion in the lower part” makes a challenge for future coastline sustainable usage and protection. |
| Key words: central Jiangsu coast tidal flat reclamation coastline change tidal flat profile saltmarsh wetland |