Inventory and Spatial Distribution of Landslides on the Eastern Slope of Gongga Mountain, Southwest China
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Area
2.2. Data
2.3. Methods
3. Results
3.1. Landslide Inventory and Spatial Distribution
3.2. Temporal Distribution
3.3. Topographic Factors
3.4. Geological Factors
3.5. Earthquake Factors
3.6. Mobility Indices
4. Discussion
4.1. Comparison of Landslide Inventories
4.2. Distribution Characteristics and Main Control Factors of Landslides in Different Valleys
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Engineering Geological Layer Combinations Symbols | Descriptive |
---|---|
A | Quaternary loose rock formations dominated by grit, pebbles, and crushed stone |
B | Semi-hard rock formations such as mudstone, shale, and sandstone interbedded |
C | Acidic igneous firmament formation |
D | Meso-basic-ultramafic magmatic hard rock formations |
E | Slate, metamorphic sandstone, and other semi-hard-to-hard rock formations |
F | Graystone, marl interbedded with sandstone, mudstone, and hard-to semi-hard rock formations |
Scope | Area (m2) | Number of Landslides | |
---|---|---|---|
Pre-Earthquake | Co-Seismic | ||
Small size | <104 | 1088 | 3977 |
Medium size | 104–105 | 106 | 298 |
Large scale | 105–106 | 4 | 9 |
Total | 1198 | 4284 |
River Basin | Area (km2) | Before the Earthquake | After the Earthquake | ||||||
---|---|---|---|---|---|---|---|---|---|
Number of Landslides | LND | Landslide Area | LAD | Number of Landslides | LND | Landslide Area | LAD | ||
Dagou basin | 163.37 | 257 | 1.573 | 1.147 | 0.007 | 776 | 4.750 | 6.009 | 0.037 |
Hailougou basin | 203.13 | 145 | 0.714 | 0.663 | 0.003 | 510 | 2.511 | 1.745 | 0.009 |
Mozigou basin | 73.46 | 49 | 0.667 | 0.154 | 0.002 | 184 | 2.505 | 0.887 | 0.012 |
Moxi basin | 37.84 | 215 | 5.682 | 0.853 | 0.023 | 762 | 20.139 | 1.884 | 0.050 |
Dadu River basin | 85.15 | 299 | 3.512 | 1.187 | 0.014 | 1964 | 23.066 | 4.405 | 0.052 |
Yanzigou basin | 239.00 | 109 | 0.456 | 0.821 | 0.003 | 84 | 0.351 | 0.281 | 0.001 |
Nanmenguangou basin | 143.15 | 124 | 0.866 | 0.471 | 0.003 | 4 | 0.028 | 0.004 | 0.000 |
Sum of all | 945.10 | 1198 | — | 5.296 | — | 4284 | — | 15.215 | — |
Data Bases | Factors | Earthquake Intensity | Engineering Geological Layer Combination | Distance to Fracture | Elevation | Topographic Relief | Aspect | Slope | Distance to the Epicentre | |
---|---|---|---|---|---|---|---|---|---|---|
Basin | ||||||||||
Pre-earthquake | Dagou basin | — | 0.242 | 0.277 | 0.129 | 0.124 | 0.116 | 0.112 | — | |
Hailuo basin | — | 0.193 | 0.169 | 0.168 | 0.192 | 0.167 | 0.111 | — | ||
Mozi basin | — | 0.191 | 0.135 | 0.155 | 0.080 | 0.317 | 0.122 | — | ||
Moxi basin | — | 0.189 | 0.099 | 0.264 | 0.180 | 0.083 | 0.186 | — | ||
Dadu River basin | — | 0.104 | 0.224 | 0.189 | 0.207 | 0.061 | 0.216 | — | ||
Yanzigou basin | — | 0.286 | 0.264 | 0.113 | 0.066 | 0.191 | 0.079 | — | ||
Nanmenguangou basin | — | 0.136 | 0.131 | 0.106 | 0.257 | 0.211 | 0.159 | — | ||
Co-seismic | Dagou basin | 0.320 | 0.147 | 0.192 | 0.094 | 0.037 | 0.043 | 0.043 | 0.125 | |
Hailuo basin | 0.295 | 0.064 | 0.094 | 0.085 | 0.087 | 0.080 | 0.074 | 0.221 | ||
Mozigou basin | 0.250 | 0.166 | 0.108 | 0.048 | 0.067 | 0.082 | 0.073 | 0.207 | ||
Moxi basin | 0.091 | 0.045 | 0.100 | 0.165 | 0.156 | 0.062 | 0.190 | 0.190 | ||
Dadu River basin | 0.195 | 0.012 | 0.178 | 0.166 | 0.132 | 0.057 | 0.137 | 0.123 | ||
Yanzigou Gou | 0.199 | 0.125 | 0.188 | 0.125 | 0.054 | 0.103 | 0.056 | 0.150 |
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Ge, R.; Chen, J.; Ma, S.; Tan, H. Inventory and Spatial Distribution of Landslides on the Eastern Slope of Gongga Mountain, Southwest China. Remote Sens. 2024, 16, 3360. https://doi.org/10.3390/rs16183360
Ge R, Chen J, Ma S, Tan H. Inventory and Spatial Distribution of Landslides on the Eastern Slope of Gongga Mountain, Southwest China. Remote Sensing. 2024; 16(18):3360. https://doi.org/10.3390/rs16183360
Chicago/Turabian StyleGe, Runze, Jian Chen, Sheng Ma, and Huarong Tan. 2024. "Inventory and Spatial Distribution of Landslides on the Eastern Slope of Gongga Mountain, Southwest China" Remote Sensing 16, no. 18: 3360. https://doi.org/10.3390/rs16183360