Bulletin of Surveying and Mapping ›› 2025, Vol. 0 ›› Issue (1): 42-51.doi: 10.13474/j.cnki.11-2246.2025.0108

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Monitoring of water level change of major lakes and reservoirs in the Yellow River basin based on multi-source satellite altimetry data

BI Longsheng, HE Rong, LU Jinhua   

  1. School of Geomatics and Land Information Engineering, Henan Polytechnic University, Jiaozuo 454100, China
  • Received:2024-04-10 Published:2025-02-09

Abstract: In response to the limitations of single satellite data in conducting large-area, long-term, and continuous water level monitoring, this paper integrates data from ICESat, CryoSat-2, and ICESat-2 satellite altimeters, and combines actual water level data with meteorological information to construct a water level sequence for major lakes and reservoirs in the Yellow River basin from 2003 to 2022. The paper also compares the accuracy of different algorithms. The results indicate that the built-in algorithms of ICESat-2 and CryoSat-2 can effectively extract water level data, with ICESat-2 demonstrating the highest precision. Rainfall is positively correlated with the water levels of inland lakes and negatively correlated with those of reservoirs. Additionally, global warming and the consequent increase in evaporation are significant factors affecting water level changes.

Key words: ICESat, ICESat-2, Cryosat-2, Yellow River basin, water level change

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