基于Sentinel-1A的青狮潭水库水体面积监测  

Water area monitoring of Qingshitan Reservoir based on Sentinel-1A

作　　者：陈诚 谢映 陈燕丽 莫建飞 李明志[2] Chen Cheng;Xie Ying;Chen Yanli;Mo Jianfei;Li Mingzhi(Guangxi Institute of Meteorological Sciences,Nanning 530022,China;Baise Meteorological Bureau,Guangxi Baise 533000,China)

机构地区：[1]广西壮族自治区气象科学研究所,南宁530022 [2]百色市气象局,广西百色533000

出　　处：《气象研究与应用》2022年第4期26-31,共6页Journal of Meteorological Research and Application

基　　金：广西气象科研计划项目(桂气科2022QN13、桂气科2021ZL04)。

摘　　要：青狮潭水库是广西北部第一大水库,水体变化对桂林市的漓江黄金水道调控有着重要影响。基于Sentinel-1A遥感数据,利用结合地形数据的阈值法对青狮潭水库进行水体面积监测。结果表明,2019年3—12月期间,水库水体面积为0.16~0.25hm^(2),水库面积空间变化主要集中在库区的西南侧和北侧;经与光学遥感监测定性对比,SAR影像提取水体准确,与目视解译的水体进行定量分析表明水体提取精度为93.58%,Kappa系数0.945,可满足水文监测需求。连续的监测结果可以为库区及其下游的生态管理、防汛抗旱工作提供参考。Qingshitan Reservoir is the largest reservoir in northern Guangxi,and the change of water in Qingshitan Reservoir has an important influence on the Waterway regulation of the Lijiang River in Guilin.Based on Sentinel-1A remote sensing data and topographic data,this study used the threshold method to extract the water surface area of Qingshitan Reservoir.The results showed that the water surface area of Qingshitan Reservoir was 0.16~0.25hm^(2)from March to December 2019,and the spatial variation of the reservoir area was mainly concentrated in the southwest and north sides of the reservoir area;After qualitative comparison with optical remote sensing monitoring,Synthetic Aperture Radar(SAR)images extracted water bodies accurately,and quantitative analysis with visually interpreted water bodies showed that the water extraction accuracy is 93.58%,and the Kappa coefficient was 0.945,which can meet the hydrological monitoring needs.The continuous monitoring results can provide a reference for ecological management,flood control,and drought relief in the reservoir area and its downstream.

关 键 词：合成孔径雷达(SAR) 水体识别 水库监测 时间序列分析 Sentinel-1A卫星 

分 类 号：P237[天文地球—摄影测量与遥感]