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Comparative Analysis and Accuracy Evaluation of BDS/GNSS Deformation Monitoring Methods in Reservoir Canyon Areas
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Zhiyong QI1, 2, Yanpian MAO1, Rongxin FANG3, *, Xinghui HU3, Zhengyang TANG1, 2, Dawen TAN1, Xuhuang DU1, Chunyao HOU1, Shirong YE3
Journal of Geodesy and Geodynamics | 2025, 45(3) : 239 - 243, 278
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Journal of Geodesy and Geodynamics | 2025, 45(3): 239-243, 278
Comparative Analysis and Accuracy Evaluation of BDS/GNSS Deformation Monitoring Methods in Reservoir Canyon Areas
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Zhiyong QI1, 2, Yanpian MAO1, Rongxin FANG3, *, Xinghui HU3, Zhengyang TANG1, 2, Dawen TAN1, Xuhuang DU1, Chunyao HOU1, Shirong YE3
Affiliations
  • 1 China Yangtze Power Co Ltd, 88 Sanyang Road, Wuhan 430014, China
  • 2 Hubei Technology Innovation Centerfor Smart Hydropower, 88 Sanyang Road, Wuhan 430014, China
  • 3 GNSS Research Center, Wuhan University, 129 Luoyu Road, Wuhan 430079, China

    • QI Zhiyong, senior engineer, majors in deformation monitoring of high dams and large reservoirs and dam safety diagnosis, E-mail:

About Author:

QI Zhiyong, senior engineer, majors in deformation monitoring of high dams and large reservoirs and dam safety diagnosis, E-mail:

Published: 2025-03-15 doi: 10.14075/j.jgg.2024.04.166
Outline
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Based on the mobile Beidou deformation monitoring system at Xiluodu hydropower station, we per- form the horizontal deformation simulation experiment. The static differential positioning, post-processed kinematic positioning and precise point positioning methods are employed to compute actual displacements and evaluate accuracy. The results indicate that the accuracy of single BDS and GPS+BDS dual systems is consistent. The static differential method has the highest accuracy, with the external coincidence accuracy of dual systems and single BDS better than 0. 5 mm and 0. 7 mm, respectively. The baseline differential method can effectively eliminate interference from dam area water vapor, ionospheric and multipath errors through 24 hours long-term observations. The maximum errors of PPK for dual systems and single BDS are 0.5 mm and 1 mm, respectively, while under dynamic PPP are 1. 7 mm and 1 mm, respectively. This shows thatPPK and PPP can also achieve deformation monitoring results close to 1 mm, demonstrating significant application potential.

dam deformation monitoring  /  BDS  /  differential positioning  /  precise point positioning
齐智勇, 毛延翩, 方荣新, 胡星辉, 汤正阳, 谭大文, 都旭煌, 侯春尧, 叶世榕. 水库峡谷区北斗/GNSS变形监测方法对比分析与精度评估. 大地测量与地球动力学, 2025 , 45 (3) : 239 -243, 278 . DOI: 10.14075/j.jgg.2024.04.166
Zhiyong QI, Yanpian MAO, Rongxin FANG, Xinghui HU, Zhengyang TANG, Dawen TAN, Xuhuang DU, Chunyao HOU, Shirong YE. Comparative Analysis and Accuracy Evaluation of BDS/GNSS Deformation Monitoring Methods in Reservoir Canyon Areas[J]. Journal of Geodesy and Geodynamics, 2025 , 45 (3) : 239 -243, 278 . DOI: 10.14075/j.jgg.2024.04.166
Funding
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  • Project of China Yangtze Power Co Ltd(Z152202016)
  • National Natural Science Foundation of China(42274025)
  • National Natural Science Foundation of China(U2340228)
Appendix
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Year 2025 volume 45 Issue 3
28
11
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Article Info
doi: 10.14075/j.jgg.2024.04.166
  • Receive Date：2024-04-11
  • Online Date：2026-10-30
  • Published：2025-03-15
Article Data
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History
  • Received：2024-04-11
Funding
Project of China Yangtze Power Co Ltd(Z152202016)
National Natural Science Foundation of China(42274025)
National Natural Science Foundation of China(U2340228)
Affiliations
    1 China Yangtze Power Co Ltd, 88 Sanyang Road, Wuhan 430014, China
    2 Hubei Technology Innovation Centerfor Smart Hydropower, 88 Sanyang Road, Wuhan 430014, China
    3 GNSS Research Center, Wuhan University, 129 Luoyu Road, Wuhan 430079, China
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https://castjournals.cast.org.cn/joweb/ddcl/EN/10.14075/j.jgg.2024.04.166
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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