An analysis of rainstorm-induced landslides in northeast Chongqing on August 31, 2014 based on interpretation of remote sensing images

LIU Zhizhong; SONG Yingxu; YE Runqing

doi:10.6046/zrzyyg.2020348

2021 Vol. 33, No. 4

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Article navigation > Remote Sensing for Natural Resources > 2021 > 33(4): 192-199

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LIU Zhizhong, SONG Yingxu, YE Runqing. 2021. An analysis of rainstorm-induced landslides in northeast Chongqing on August 31, 2014 based on interpretation of remote sensing images. Remote Sensing for Natural Resources, 33(4): 192-199. doi: 10.6046/zrzyyg.2020348

Citation:

LIU Zhizhong, SONG Yingxu, YE Runqing. 2021. An analysis of rainstorm-induced landslides in northeast Chongqing on August 31, 2014 based on interpretation of remote sensing images. Remote Sensing for Natural Resources, 33(4): 192-199. doi: 10.6046/zrzyyg.2020348

An analysis of rainstorm-induced landslides in northeast Chongqing on August 31, 2014 based on interpretation of remote sensing images

1. China Railway 11th Bureau Group Fourth Engineering Co., Ltd., Wuhan 100855, China；
2. Jiangxi Engineering Laboratory on Radioactive Geoscience and Big Data Technology, School of Information Engineering, East China University of Technology, Nanchang 330013, China；
3. Wuhan Center of China Geological Survey (Central South China Innovation Center for Geosciences), Wuhan 430205, China

Received Date: 06 November 2020

Publish Date: 15 December 2021

Abstract

Abstract

A rainstorm struck northeast Chongqing from August 31 to September 2, 2014. It triggered extensive landslides and resulted in casualties and serious economic losses. To learn the condition of the landslides induced by the rainstorm and analyze the relationship between the landslides and rainfall, this study obtains the distribution of the landslides through the interpretation of high-resolution satellite remote sensing images before and after the rainstorm using RS and GIS techniques. It can be concluded that complicated geological tectonic conditions and corresponding unique tectonic erosion landform pattern make northeast Chongqing become the center of the rainstorm and also lead to the frequent occurrence of rainfall-triggered landslides in this area. Landslides will continuously occur when the maximum daily rainfall and accumulated rainfall exceed 80 mm and 160 mm, respectively, and extensive landslides will occur when the maximum daily rainfall and accumulated rainfall exceed 100 mm and 210 mm, respectively. Furthermore, landslides are the most liable to occur in windward slopes with a gradient of about 25°. Therefore, the regional topography should be taken into account in the analysis and prediction of rainfall-induced geological disasters to improve the accuracy of spatial and temporal prediction and analysis of geological hazards.
- extreme rainstorm /
- landslide /
- remote sensing image interpretation /
- northeast Chongqing /

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References

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