摘要
水面信息是陆面过程模拟中重要的输入参量,本文以西北地区黑河流域为研究对象,通过比较哨兵数据(Sentinel-2A)和Landsat数据光谱的空间尺度差异及其水面信息提取结果的不确定性,综合分析了二者协同提取水面信息的可行性和有效性.研究结果表明:(1)哨兵和Landsat8数据对不同地物的光谱曲线具有相似性;(2)不同模型对哨兵和Landsat8数据的敏感性差异不大,具有很好的适用性;(3)不同的空间分辨率数据提取水面信息的精度具有一定的差异,10、20、30m分辨率得到的结果差异不大,但是60m分辨率得到的结果的精度有明显降低的趋势.两种数据协同使用可以进行大面积更高频次的提取地表水面信息.
The water surface information is an important input parameter in land surface process analysis and simulation.In region application,the spatial resolution of remote sensing data with high resolution is relatively high,but the time resolution is low.Therefore,the high-resolution remote sensing data assisted water surface information extracting is a significant way to extract water surface information in large aera and with high frequency.In this study,the Sentinel-2A and Landsat data were compared in terms of spectral data,differences of spatial scale and the uncertainty of water extraction results,also,the feasibility and effectiveness of collaborative water surface information extraction were comprehensively analyzed.The results show that the spectral curves of Sentinel-2A and Landsat data are similar.The sensitivity of different models to Sentinel-2A and Landsat data is not very different,which means good applicability.The accuracy of water surface information extracted from data with different spatial resolutions varies to a certain extent.The results obtained with resolutions of 10 m,20 m and 30 m show little difference,but it tends to decrease significantly under the resolution of 60 m.The two kinds of data can be used together to extract the water surface information in a large area with higher frequency.
作者
张戈
夏建新
杜蕾
王大成
王树东
ZHANG Ge;XIA Jianxin;DU Lei;WANG Dacheng;WANG Shudong(College of Life and Environmental Sciences,Minzu University of China,Beijing 100081,China;Research Institute of Aerospace Information Innovation,Chinese Academy of Sciencess,Beijing 100101,China)
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2020年第6期1361-1368,共8页
Journal of Basic Science and Engineering
基金
国家自然科学基金项目(41671362)
作者简介
张戈(1979—),女,博士研究生.E-mail:285149242@qq.com;通信作者:王树东(1973—),男,副研究员.E-mail:wangsd@radi.ac.cn
