长江干流江心洲过去35年面积变化及其特征  

Changes in the area of river islands in the Yangtze River mainstream over the past 35 years and their characteristics

作　　者：姜玲玲 徐利强[1,2] 计超 JIANG Lingling;XU Liqiang;JI Chao(School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China;Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China)

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009 [2]中国科学院地球环境研究所,陕西西安710061

出　　处：《合肥工业大学学报（自然科学版）》2022年第5期673-677,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(41402148);中国科学院地球环境研究所黄土与第四纪地质国家重点实验室开放基金资助项目(SKLLQG1929);中央高校基本科研业务费专项资金资助项目(JZ2017HGTB0201)。

摘　　要：文章对长江干流面积大于1 km^(2)的所有(64个)江心洲进行研究,通过卫星遥感影像解译,重建长江干流江心洲在1984—2019年的动态变化过程。结果表明:长江干流江心洲在过去35年总体上以扩张为主,总面积增加72.9 km^(2);不同位置的江心洲表现出一定的区域性特征,沪安段(上海至安庆)和黄洪段(黄石至洪湖)江心洲面积增加最显著,安黄段(安庆至黄石)和洪宜段(洪湖至宜宾)江心洲面积在一定程度上减小;3种不同类型(1~10 km^(2)、10~50 km^(2)、大于50 km^(2))江心洲面积表现出相同的增加趋势,但小型(1~10 km^(2))和中型(10~50 km^(2))江心洲的变化幅度更大。研究结果可为长江的航道整治和岸线开发提供参考。This study analyzed 64 river islands with area greater than 1 km^(2) in the mainstream of the Yangtze River.Based on satellite remote sensing and image interpretation,the area changes of the 64 islands from 1984 to 2019 were reconstructed.The results revealed that the islands showed an overall pattern of expansion over the last 35 years,during which the area of the islands increased by 72.9 km^(2).Nonetheless,area changes of the islands also displayed some spatial characteristics.Hu-An(Shanghai-Anqing)and Huang-Hong(Huangshi-Honghu)sections displayed the most significant increase in area.In contrast,island areas of An-Huang(Anqing-Huangshi)and Hong-Yi(Honghu-Yibin)decreased to some extent.In terms of area,the 64 islands were categorized into three groups(1-10 km^(2),10-50 km^(2),greater than 50 km^(2)).Through statistical analyses,it was identified that all three island groups showed a very similar change pattern over the past 35 years,but islands with areas of 1-10 km^(2) and 10-50 km^(2) showed the large increase in area.This study provides a reference for channel regulation and shoreline development of the Yangtze River.

关 键 词：长江 江心洲 遥感影像 

分 类 号：X144[环境科学与工程—环境科学]