基于ICESat-2高差数据的纳木错湖泊水位变化  

The water level change of Namco Lake based on ICESat-2 height difference data

作　　者：刘明启 陈国栋 张志杰 LIU Mingqi;CHEN Guodong;ZHANG Zhijie(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;School of Geographical Science and Geomatics Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Suzhou Key Laboratory of Spatial Information Intelligence Technology and Application,Suzhou 215009,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009 [2]苏州科技大学地理科学与测绘工程学院,江苏苏州215009 [3]苏州市空间信息智能技术与应用重点实验室,江苏苏州215009

出　　处：《测绘通报》2025年第4期96-101,共6页Bulletin of Surveying and Mapping

基　　金：国家自然科学基金(42192531);中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室项目(SKLGED2024-2-3)。

摘　　要：湖泊水位监测是卫星测高技术重要应用场景之一。然而,大多数卫星测高技术监测湖泊水位的研究没有顾及大地水准面残差对结果的影响。针对此问题,本文选取了2018年10月—2023年8月的ICESat-2中的ATL13数据,通过高差法分析纳木错湖泊的水位变化。结果表明,利用交叉点法和重复轨道数据获得的纳木错湖泊水位变化,能够有效地减少大地水准面残差的影响,提升水位监测的精度,与实测水位的相关系数高达0.92。通过对纳木错湖泊水位变化的分析,发现其水位在每年夏季上升,冬季相对稳定,总体呈上升趋势。本文研究证明了结合卫星测高交叉点和重复轨道数据检测湖泊水位的精度,能够为内陆湖泊的水文研究提供可靠的数据支持。Lake water level monitoring is one of the important application scenarios of satellite altimetry technology.However,most studies on lake water level monitoring using satellite altimetry technology do not take into account the impact of geoid residuals on the results.To address this issue,this study selects ATL13 data from ICESat-2 from October 2018 to August 2023 to analyze the water level changes of Nam Co Lake using the height difference method.The results show that the water level changes of Nam Co Lake obtainedby using the intersection method and repeated orbit data can effectively reduce the impact of geoid residuals and improve the accuracy of water level monitoring,with a correlation coefficient of up to 0.92 with the measured water level.Through the analysis of the water level changes of Nam Co Lake,it is found that its water level rises in summer every year and is relatively stable in winter,with an overall upward trend.This study proves the accuracy of detecting lake water levels by combining satellite altimetry intersections and repeated orbit data,providing reliable data support for hydrological research on inland lakes.

关 键 词：ICESat-2 高差法 水位监测 

分 类 号：P237[天文地球—摄影测量与遥感]