Non-Tectonic Geohazards of Guangdong Province, China, Monitored Using Sentinel-1A/B from 2015 to 2022
Abstract
:1. Introduction
2. Geological Structure and Geological Hazard Background
2.1. Geological Structure and Climatic Environment
2.2. Geological Hazard Types and Distribution
3. InSAR Data Processing and Deformation Analysis
3.1. InSAR Dataset Introduction
3.2. Multi-Temporal InSAR Technology
3.3. Surface Deformation Results and Field Verification
4. Identification and Statistical Analysis of Surface Deformation
5. Discussion
5.1. Temporal and Spatial Characteristics of Surface Deformation in Guangdong Province
5.2. The Correlation between Geological Hazards and Human Activities
5.3. Sentinel-1A/B Disaster Monitoring Capability and Limitations in Guangdong Province
6. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Satellite Sensor | Parameters | Value |
---|---|---|
Sentinel-1A/B | Wavelength | 5.6 cm (C-band) |
Flight direction | Ascending | |
Type of product | SLC | |
Revisit cycle | 12/24 days | |
Image mode | IW | |
Polarization mode | VV | |
Incidence angle | 29°–46° | |
Azimuth angle | 348.5°–350.3° | |
Acquisition time | 2015/06–2022/12 |
City | Number | Number Percentage (%) | Area (km2) | Area Percentage (%) |
---|---|---|---|---|
Guangzhou (GZ) | 133 | 5.71% | 96.0 | 3.02% |
Shaoguan (SG) | 44 | 1.89% | 16.1 | 0.51% |
Shenzhen (SZ) | 30 | 1.29% | 35.0 | 1.10% |
Zhuhai (ZH) | 132 | 5.67% | 405.2 | 12.76% |
Shantou (ST) | 98 | 4.21% | 188.8 | 5.95% |
Foshan (FS) | 133 | 5.71% | 84.9 | 2.67% |
Jiangmen (JM) | 197 | 8.46% | 332.2 | 10.46% |
Zhanjiang (ZJ) | 781 | 33.53% | 1439.3 | 45.33% |
Maoming (MM) | 29 | 1.25% | 7.8 | 0.25% |
Zhaoqing (ZQ) | 129 | 5.54% | 95.6 | 3.01% |
Huizhou (HZ) | 84 | 3.61% | 44.1 | 1.39% |
Meizhou (MZ) | 28 | 1.20% | 7.2 | 0.23% |
Shanwei (SW) | 49 | 2.10% | 79.3 | 2.50% |
Heyuan (HY) | 33 | 1.42% | 9.9 | 0.31% |
Yangjiang (YJ) | 32 | 1.37% | 18.0 | 0.57% |
Qingyuan (QY) | 45 | 1.93% | 12.5 | 0.39% |
Dongguan (DG) | 76 | 3.26% | 49.7 | 1.56% |
Zhongshan (ZS) | 128 | 5.50% | 164.07 | 5.17% |
Chaozhou (CZ) | 57 | 2.45% | 37.2 | 1.17% |
Jieyang (JY) | 68 | 2.92% | 46.6 | 1.47% |
Yunfu (YF) | 23 | 0.99% | 5.4 | 0.17% |
Deformation Velocity | Area (km2) |
---|---|
3175.0 | |
614.1 | |
65.6 | |
0.2 |
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Liu, J.; Fu, Z.; Zhou, L.; Feng, G.; Wang, Y.; Luo, W. Non-Tectonic Geohazards of Guangdong Province, China, Monitored Using Sentinel-1A/B from 2015 to 2022. Sensors 2024, 24, 5449. https://doi.org/10.3390/s24165449
Liu J, Fu Z, Zhou L, Feng G, Wang Y, Luo W. Non-Tectonic Geohazards of Guangdong Province, China, Monitored Using Sentinel-1A/B from 2015 to 2022. Sensors. 2024; 24(16):5449. https://doi.org/10.3390/s24165449
Chicago/Turabian StyleLiu, Jincang, Zhenhua Fu, Lipeng Zhou, Guangcai Feng, Yilin Wang, and Wulinhong Luo. 2024. "Non-Tectonic Geohazards of Guangdong Province, China, Monitored Using Sentinel-1A/B from 2015 to 2022" Sensors 24, no. 16: 5449. https://doi.org/10.3390/s24165449