基于Sentinel-1的长江干流水域面积动态变化遥感监测  

Dynamic changes of main stream water area in the Yangtze River from Sentinel-1 remote sensing data

作　　者：严夏青 金双根 黄敏敏 YAN Xiaqing;JIN Shuanggen;HUANG Minmin(School of Remote Sensing&Geomatics Engineering,Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学遥感与测绘工程学院,江苏南京210044

出　　处：《测绘通报》2022年第1期33-38,共6页Bulletin of Surveying and Mapping

基　　金：中科院先导A专项课题(XDA23040100)。

摘　　要：本文利用Sentinel-1数据获得了2016—2020年月度长江干流上海—宜宾段水域面积,并分析其年际、年内变化规律。分析结果表明,①月度变化规律为1—5月水面面积变化相对平稳,6—8月水域面积逐步增加,在7月达到峰值;9月稍有回落,10月再次达到峰值后逐步减少至稳定。②季节性变化规律为冬季水域面积最小,夏季水域面积最大,夏季和冬季呈现明显的季节差异。③年际变化规律为2016年后水域面积呈增长趋势,其中2017—2019年水域面积相对稳定且缓慢增长,2020年面积急剧增长。分段而言,水域面积随时间的变化幅度为下游>中游>上游,中上游变化相对平稳,下游较显著。④易发生洪涝的断面主要分布在中下游段,需引起重视并做好监测预警。This paper uses Sentinel-1 data to obtain the monthly water area of Shanghai-Yibin section from 2016 to 2020,and analyzes its annual and inter annual changes.The results show that:①Monthly variation rules is that January to May water surface variations are relatively stable,and the water area in June to August has gradually increased and is peak in July.It’s falling slightly in September,and gradually decreases to stability after reaching the peak in October.②Seasonal variation rules is that the waters in winter is the smallest area,the summer water area is the largest,It shows a significant seasonal difference in summer and winter.③Endevelopment rules is that the trend in the water area after 2016 where the water area is relatively stable in 2017—2019,and is growing in 2020.In terms of segmentation,the water area is downstream with time to change from time to time,the range of which is biger than the middle’s,and the middle’s is biger than the upstream’s,the upstream changes are relatively stable,and the downstream is more remarkable.④It is prone to flooding,which mainly is distributed in a mid-range reaches,and it is necessary to pay attention to monitoring warning.

关 键 词：Sentinel-1 Google Earth Engine 遥感动态监测 长江干流 

分 类 号：P237[天文地球—摄影测量与遥感]