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Obtaining Accurate Water Level Measurements in Lakes: Analysis of Changes in ICESat Altimetry Accuracy With Buffer Changes

文献类型：期刊论文

作者Xu, Yuyue2,3; Gu, Saihua2,3; Yin, Zijun2,3; Lin, Jing2,3; Zhao, Jianwei2,3; Zhu, Xiaoyun2,3; Yao, Ling1,4
刊名IEEE ACCESS
出版日期2020
卷号8页码:81090-81100
关键词ICESat lake water level altimetry accuracy footprint water mask
ISSN号2169-3536
DOI10.1109/ACCESS.2020.2991228
通讯作者Yao, Ling(yaoling@lreis.ac.cn)
英文摘要Determining the accuracy of lake water levels calculated based on Ice, Cloud, and land Elevation Satellite (ICESat) data mainly relies on identifying lake water footprints (LWFs), which are obtained using an overlay analysis of lake water masks (LWMs) and ICESat tracks. However, most previous studies that have conducted a buffer analysis based on LWMs have set the buffer size subjectively without providing a detailed explanation for this or conducting a system analysis. In this study, the effects of using inside and outside buffers to obtain LWMs for seven lakes are analyzed. The Modified Normalized Difference Water Index (MNDWI) was applied to extract LWMs from Thematic Mapper (TM) images. The boxplot was used to remove footprints with abnormal elevations, and then the average of the remaining footprints was calculated as the ICESat water level. To compare with the in situ measured data, the root mean square error (RMSE) was used for accuracy evaluation. Results show the following: (1) for Yamzhog Yumco, which is a narrow lake, the altimetry accuracy is higher when using the outside buffer than for the inside buffer or with no buffer, and the highest accuracy is obtained with an outside buffer of approximately 100 m. (2) For other relatively wide lakes, such as Lake Michigan, Lake Erie, Lake Huron, Lake Ontario and Lake Superior, the inside buffer method does not always improve altimetry accuracy, and this result differs from those presented previously. (3) For different lakes, the range of change in altimetry accuracy is affected by the number of LWFs. This study is of value for use in studies that apply ICESat altimetry data to obtain changes in lake water levels, especially for relatively narrow lakes, and the results imply that the altimetry accuracy can be improved by using the outside buffer.
WOS关键词SATELLITE ALTIMETRY ; TIBETAN PLATEAU ; CLIMATE-CHANGE ; CHINA ; RIVER ; SURFACE ; INUNDATION ; RESERVOIRS ; DYNAMICS ; IMPACTS
资助项目National Key Research and Development Plan[2017YFB0504205] ; Program for National Natural Science Foundation of China[41671423] ; Program for National Natural Science Foundation of China[41771380] ; Program for National Natural Science Foundation of China[41830105] ; Program for National Natural Science Foundation of China[41301447] ; Ministry Science and Technology Development of China-Data Sharing Infrastructure of Earth System Science[2005DKA32300] ; Fundamental Research Funds for the Central Universities[020914380073]
WOS研究方向Computer Science ; Engineering ; Telecommunications
语种英语
WOS记录号WOS:000549479700024
出版者IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
资助机构National Key Research and Development Plan ; Program for National Natural Science Foundation of China ; Ministry Science and Technology Development of China-Data Sharing Infrastructure of Earth System Science ; Fundamental Research Funds for the Central Universities
源URL[http://ir.igsnrr.ac.cn/handle/311030/158352]  
专题中国科学院地理科学与资源研究所
通讯作者Yao, Ling
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China
2.Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210023, Peoples R China
3.Nanjing Univ, Jiangsu Prov Key Lab Geog Informat Sci & Technol, Nanjing 210023, Peoples R China
4.Nanjing Normal Univ, Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing 210023, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Yuyue,Gu, Saihua,Yin, Zijun,et al. Obtaining Accurate Water Level Measurements in Lakes: Analysis of Changes in ICESat Altimetry Accuracy With Buffer Changes[J]. IEEE ACCESS,2020,8:81090-81100.
APA Xu, Yuyue.,Gu, Saihua.,Yin, Zijun.,Lin, Jing.,Zhao, Jianwei.,...&Yao, Ling.(2020).Obtaining Accurate Water Level Measurements in Lakes: Analysis of Changes in ICESat Altimetry Accuracy With Buffer Changes.IEEE ACCESS,8,81090-81100.
MLA Xu, Yuyue,et al."Obtaining Accurate Water Level Measurements in Lakes: Analysis of Changes in ICESat Altimetry Accuracy With Buffer Changes".IEEE ACCESS 8(2020):81090-81100.

入库方式： OAI收割

来源：地理科学与资源研究所

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