基于ICESat-2的河流水位监测改正模型  

River level monitoring correction model based on ICESat-2

作　　者：王瑞琨 何荣[1] 武雷岗 WANG Ruikun;HE Rong;WU Leigang(School of Surveying and Land Information Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]河南理工大学测绘与国土信息工程学院,河南焦作454000

出　　处：《测绘通报》2025年第4期102-108,共7页Bulletin of Surveying and Mapping

基　　金：NSFC-区域创新发展联合基金重点项目(U22A20566);河南省高等学校重点科研资助项目(18B420003);河南理工大学基本科研业务费专项(NSFRF170909)。

摘　　要：针对河流水面存在坡度且卫星监测数据有一定间距,导致难以构建水位时间序列以进行水文研究的问题,本文提出了一种基于ICESat-2测高数据构建河流水位改正模型的方法。利用ICESat-2卫星2018—2023年的全球测高数据,以黄河下游河南段为研究区,构建补偿ICESat-2测高卫星的地面轨迹变化的河流水位改正模型,结合2016—2024年Sentinel-3A/B的单轨数据构建研究区内4个水文站处的水位时间序列,并进行精度验证与变化分析。结果表明,改正后的ICESat-2卫星的多轨数据与Sentinel-3A/B卫星单轨数据精度相当,两者最大相关系数均为0.96,最小均方根误差分别为0.23 m、0.21 m;构建的水位时间序列平均时间分辨率可达13 d;2016—2024年黄河下游河南段的水位呈先升后降的季节性变化规律,降水量与蒸发量是引起水位变化的主要动因。In light of the challenge in establishing a time series of water level for hydrological research caused by the slope of the river surface and the considerable distance in satellite monitoring data,this paper puts forward a correction approach to construct a river level correction model based on ICESat-2 altimeter data.The global altimeter data of ICESat-2 from 2018 to 2023 is employed.Taking the lower reaches of the Yellow River as the research area,a river level correction model is developed to compensate for the ground track variations of the ICESat-2 altimeter satellite.In combination with the monorail data of Sentinel-3A/B from 2016 to 2024,the water level time series at four hydrological stations in the study area is constructed,and the accuracy verification and change analysis are conducted.The results demonstrate that the accuracy of the multi-orbit data of ICESat-2 corrected by the corrected model is comparable to that of the Sentinel-3A/B monorail data,with the maximum correlation coefficient being 0.96 and the minimum root-mean-square error being 0.23 and 0.21 m respectively.The average time resolution of the constructed water level time series can reach 13 days.From 2016 to 2024,the water level in the Henan section of the lower reaches of the Yellow River exhibits a seasonal variation law of rising first and then decreasing,and rainfall and evaporation are the main factors causing the water level change.

关 键 词：水位改正模型 ICESat-2 Sentinel-3A/B 时间序列 水位变化 

分 类 号：P228.3[天文地球—大地测量学与测量工程]