Spatial and Temporal Distribution of Geologic Hazards in Shaanxi Province
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Area
2.2. Data Sources and Methodology
3. Results
3.1. Spatio-Temporal Distribution of Geological Hazards
3.2. The Potential Impact Factors of Geological Hazards
3.3. Rainfall Threshold of Rainfall-Triggered Geological Hazards
4. Discussion
4.1. Spatio-Temporal Distribution of Geological Hazards and Their Impact Factors
4.2. Sensitivity Analysis of Rainfall Threshold Model
5. Conclusions
- (1)
- The geological hazards in SS mainly occurred in rainy season from July to September and October. In contrast, the seasonal distribution of geological hazards in NS was relatively smoother, and the hazards in spring were mainly affected by the freeze–thaw processes.
- (2)
- Spatially, there were great differences in the physical geography and climate conditions between NS and SS, as well as the distribution of geological hazards, but there was no difference in the rainfall threshold.
- (3)
- The collapse and landslide events were mainly affected by human factors in NS and by geomorphology in SS. Permeability was a dominant factor for debris flows. Thus, the construction of drainage ditches and other engineering measures could effectively reduce the debris flow events.
- (4)
- The earthquake mainly triggered landslides and collapses in HZ and BJ areas on the day of 12 May 2008 but had no effect on the rainfall threshold of subsequent geological hazards.
Author Contributions
Funding
Conflicts of Interest
References
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Step | Parameter Name | Parameter Value | Unit |
---|---|---|---|
S0 | GS | 0.2 | mm |
S1 | ER | 0.2 | mm |
S1 | P1 | 1 | h |
S2 | P2 | 1.5 | h |
S3 | P3 | 1 | mm |
S4 | P4 | 12 | h |
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Liang, S.; Chen, D.; Li, D.; Qi, Y.; Zhao, Z. Spatial and Temporal Distribution of Geologic Hazards in Shaanxi Province. Remote Sens. 2021, 13, 4259. https://doi.org/10.3390/rs13214259
Liang S, Chen D, Li D, Qi Y, Zhao Z. Spatial and Temporal Distribution of Geologic Hazards in Shaanxi Province. Remote Sensing. 2021; 13(21):4259. https://doi.org/10.3390/rs13214259
Chicago/Turabian StyleLiang, Shizhengxiong, Dong Chen, Donghuan Li, Youcun Qi, and Zhanfeng Zhao. 2021. "Spatial and Temporal Distribution of Geologic Hazards in Shaanxi Province" Remote Sensing 13, no. 21: 4259. https://doi.org/10.3390/rs13214259