| 基于星载激光雷达的高原堰塞湖水文要素反演与变化特征分析 |
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| 引用本文： | 朱长明,张新,方晖,王伟胜.基于星载激光雷达的高原堰塞湖水文要素反演与变化特征分析[J].测绘通报,2021,0(1):29-34. |
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| 作者姓名： | 朱长明 张新 方晖 王伟胜 |
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| 作者单位： | 江苏师范大学地理测绘与城乡规划学院,江苏 徐州221116;中国科学院遥感与数字地球研究所遥感科学国家重点实验室,北京100101;中国科学院遥感与数字地球研究所遥感科学国家重点实验室,北京100101;中国科学院大学,北京100049;中国科学院大学,北京100049;中国科学院中亚生态与环境研究中心,新疆 乌鲁木齐830011;中国科学院大学,北京100049;中国科学院中亚生态与环境研究中心,新疆 乌鲁木齐830011;中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,新疆 乌鲁木齐830011 |
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| 基金项目： | 江苏高校优势学科建设工程资助项目;国家自然科学基金;国家重点研发计划 |
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| 摘 要： | 针对帕米尔高原堰塞湖——萨雷兹湖的安全问题及水文站点资料获取困难，缺乏时段固定、精度统一的准实时湖泊水位信息等问题，本文提出了基于星载激光雷达测高数据（ICESat-1/2）的高原湖泊水位综合反演。开展了近20年（2003—2019年）的水位变化遥感调查和时序重建研究，并采用趋势分析和Mann Kendall （M-K）非参数检验，对近20年萨雷兹湖的水位变化特征进行过程分析，初步揭示了萨雷兹湖水位的近期变化趋势和规律。结果表明：①ICESat-1/2激光测高雷达数据在陆地湖泊水位反演中误差可控制在0.05 m之内，精度高度可信，为无/缺资料地区湖泊水文监测提供良好的数据源；②2003—2019年，萨雷兹湖的水位持续呈现显著上升的趋势，水位上升的速率约为0.15 m/a （p<0.01，双尾）；③萨雷兹湖的水位年内波动较大（至少7~8 m）。最高水位出现在9—10月，当前平均水位约为3265 m，最低水位出现在3—5月，当前平均水位约为3259 m。以上研究结果可为萨雷兹湖的综合治理及安全评估提供数据支持和技术参考。
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| 关 键 词： | 萨雷兹湖 水位反演 激光雷达 ICESat-1/2 遥感 |
| 收稿时间： | 2030-03-12 |
Monitoring and dynamic analysis of water level of Sarez Lake by remote sensing technology based on ICESat-1/2 laser altimeter system |
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| ZHU Changming,ZHANG Xin,FANG Hui,WANG Weisheng.Monitoring and dynamic analysis of water level of Sarez Lake by remote sensing technology based on ICESat-1/2 laser altimeter system[J].Bulletin of Surveying and Mapping,2021,0(1):29-34. |
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| Authors: | ZHU Changming ZHANG Xin FANG Hui WANG Weisheng |
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| Institution: | (School of Geography,Geomatics and Planning,Jiangsu Normal University,Xuzhou 221116,China;State Key Laboratory of Remote Sensing Science,Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China;Research Center for Ecology and Environment of Central Asia,Chinese Academy of Sciences,Urumqi 830011,China;State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Acadmey of Sciences,Urumqi 830011,China) |
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| Abstract: | In view of the safety problems of Sarez Lake and the difficulty in obtaining hydrological site data,resulting in lack of timefixed and uniform precision of quasi-real-time lake water level information,this paper proposes a plateau lake water level retrieval method based on space-borne laser altimeter data( ICESat-1/2). Sarez Lake level time series survey is carried out by remote sensing altimetry technology and water level changes in the past 20 years( 2003—2019) are reconstructed. Trend analysis and Mann Kendall( MK) nonparametric test are used to analyze the water level variation characteristics of the Sarez lake in the past 20 years. The recent trends and patterns of the water level in Sarez Lake are revealed. The results show that: ①The error of ICESat-1/2 laser altimetry radar data can be controlled within 0. 05 m in the inversion of land lake water level. So the accuracy is highly credible,which provides favorited/promised data source for lake hydrological monitoring in no,lack data area. ②During 2003—2019,the water level of Sarez lake still shows a significant upward trend,and the rate of water level raise is about 0.15 m/a( p < 0.01,two-tailed).③The water level of Sarez Lake is highly volatile during the year( 7~8 m at least). The highest water level occurs from September to October,the current average water level is about 3265 m;the annual minimum water level appears from March to May,and the current average water level is about 3259 m. The above findings provide data support and technical reference for the comprehensive management and safety assessment of Sarez Lake. |
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| Keywords: | Sarez Lake water level retrieval laser altimeter ICESat-1/2 remote sensing |
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