摘要
干旱区内陆尾闾湖泊由于湖盆地形浅平、岸线复杂等特点,采用传统的水位-面积关系法难以反演高精度的水量变化信息。本文提出了一种基于密集时序ICESat-2和Sentinel-2数据反演浅平型内陆湖泊湖盆地形和重建水量时序的方法。本文方法利用浅平型湖泊季节性变化显著的特性,筛选和计算不同时期湖盆内非水面区域的所有ICESat-2激光光子点的高程信息,并根据水面等高的特性内插得到Sentinel-2不同时相水面线的高程信息,在此基础上通过这些加密的高程点构建高精度湖盆地形信息,并结合水面时序重建湖泊的水量变化。以新疆塔里木河尾闾台特玛湖为试验区,基于132期Sentinel-2卫星影像和28个时相的ICESat-2激光脉冲数据,重建了2016—2022年的湖泊水量时序。结果表明,本文方法获取的湖盆地形高程中误差为0.103 m,可为无资料浅平型湖泊水量信息的时序重建提供一种思路。
The inland endorheic lakes in arid regions have shallow-flat basins and complex shorelines,which makes it hard to retrieve high-accuracy water volume changes through traditional‘water level-area curve’methods.In this paper,a method is proposed to retrieve basin topography and reconstruct time-series water volumes for shallow-flat inland lakes based on multi-temporal ICESat-2 and Sentinel-2 data.Firstly,all the multi-temporal ICESat-2 photons inside the non-water areas of the lake basin were selected and their elevations were retrieved.Secondly,the multi-temporal lake boundaries were delineated from the Sentinel-2 images,and their elevations were interpolated by these ICESat-2 points due to the fact that a lake water boundary is equivalent to a contour line.Finally,the lake basin topography was retrieved based on these densified ICESat-2 photon altimetric points,and the time-series lake volumes were reconstructed according to the basin DEM and time-series lake area extents.The method was tested by the Taitema Lake which is the terminal lake of the Tarim river,and about 132 scenes of Sentinel-2 satellite remote sensing images and 28 phases of ICESat-2 laser beam data were used to reconstructed water volume changes from 2016 to 2022.The result showed that the RMSE error of the lake DEM is 0.103 m,which can provide a way of time series reconstruction of shallow-flat lakes in un-gauged basins.
作者
吴浩儒
李均力
包安明
张久丹
马英莲
WU Haoru;LI Junli;BAO Anming;ZHANG Jiudan;MA Yinglian(State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China;University of Chinese Academy of Sciences,Beijing 100049,China;Xinjiang Laboratory of Remote Sensing and GIS Application,Urumqi 830011,China;Xinjiang Academy of Surveying&Mapping,Urumqi 830002,China)
出处
《测绘学报》
EI
CSCD
北大核心
2023年第12期2078-2088,共11页
Acta Geodaetica et Cartographica Sinica
基金
新疆天山科技创新团队(2022TSYCTD0006)
国家自然科学基金(U2003201,41671034)
第三次新疆综合科学考察项目(2021xjkk1403)。
关键词
湖盆地形
内陆湖
水量
时序重建
ICESat-2
lake basin topography
inland lake
water volume
time-series reconstruction
ICESat-2
作者简介
第一作者:吴浩儒(1999-),男,硕士,研究方向为干旱区水文水资源及湿地生态环境遥感。E-mail:wuhaoru20@mails.ucas.ac.cn;通信作者:李均力,E-mail:lijl@ms.xjb.ac.cn。
