华东地质2025，Vol.46Issue(4)：489-503,15.DOI:10.16788/j.hddz.32-1865/P.2025.06.016
120年以来辽宁省海岸线变化过程及其驱动机制
The 120-year change process of Liaoning coastline and its driving mechanism
摘要
Abstract
The data on coastline types and their dynamic changes are critically important for the rational de-velopment,ecological protection,and restoration of coastal zones.Based on historical maps,remote sensing im-ages and field survey verification,this study acquired coastline data across Liaoning Province for six periods(1894,1940,1975,2000,2010 and 2020).By integrating historical literature,we further examined the spatiotem-poral evolution characteristics and driving mechanisms of coastline changes in the region.The results show that:①Over the past 120 years,the measured lengths of the six historical shorelines in Liaoning Province were 1673.5 km,2137.34 km,2052.57 km,2045.27 km,2047.54 km and 2516.49 km,respectively.During this peri-od,the proportion of natural coastline declined sharply,a trend primarily driven by extensive land reclamation ac-tivities.②From 1894 to 2020,68.97%of the coastline advanced seaward at an average rate of 39.44 m/a(LRR),while 31.03%retreated landward at an average rate of 10.02 m/a(LRR).Specifically,from 1894 to 1940,erosion dominated the Daliaohe River Estuary,whereas accretion occurred near the Liaohe River Estuary;Between 1940 and 1975,the eastern part of the Liaohe Estuary experienced erosion,while the western part showed accretion;since 1975,continuous sea enclosure and land reclamation activities have resulted in rapid coastline progradation,with the most significant changes observed along the Jinzhou section from 2010 to 2020.③Based on long-term data on sea enclosure and land reclamation from 1940 to 2020,the tidal flat area in Liaoning Province experi-enced a cumulative loss of 1 801.71 km2,with the most significant reductions occurring in Jinzhou,Panjin and Dandong.④Analysis of the drivers on coastline changes indicates that from 1894 to 1940,changes were predom-inantly influenced by natural factors,including sea-level variations and sediment deposition,evidenced by the sea-ward progradation of the Liaohe Estuary and the erosion retreat of the Dalinghe River Estuary.During the period 1940-1975,changes were jointly controlled by natural and human factors,with typical erosion in the eastern Liao River Estuary and accretion in the western section.From 1975 to 2020,human activities,particularly sea en-closure and land reclamation,became the dominant driver of coastal transformation.This study offers a scientific basis for the management of shoreline resources in Liaoning Province and other coastal regions.关键词
海岸线/遥感影像/自然岸线/驱动机制/辽宁省Key words
coastline/remote sensing imagery/natural coastline/driving mechanism/Liaoning Province分类
天文与地球科学引用本文复制引用
XU Qiongyu,WEN Mingzheng,TIAN Lizhu,WANG Feicui,DING Hu,LI Chang,WANG Fu..120年以来辽宁省海岸线变化过程及其驱动机制[J].华东地质,2025,46(4):489-503,15.基金项目
科技基础资源调查专项"环渤海岸线资源和滨海湿地旅游资源调查(编号:2021FY101003)"、中国地质调查局"津冀沿海资源环境承载能力调查(编号:DD20189506)""黄渤海海岸带重点生态保护修复区综合地质调查(编号:DD20211301)"项目联合资助. （编号:2021FY101003）
