Risk assessment of landslides induced by the Ms6.2 earthquake in Jishishan, Gansu Province
On December 18, 2023, at 23:59, a magnitude Ms6.2 earthquake occurred in Jishishan County, Gansu Province, resulting in significant casualties and triggering numerous secondary geological disasters such as landslides and collapses. Utilizing high-resolution satellite imagery from before and after th...
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Editorial Office of The Chinese Journal of Geological Hazard and Control
2025-02-01
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| Series: | Zhongguo dizhi zaihai yu fangzhi xuebao |
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| Online Access: | https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202405010 |
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| author | Xiuqin WANG Quanfu NIU Hao WANG Xi’an CHENG Kegong LI Hulin NIU |
| author_facet | Xiuqin WANG Quanfu NIU Hao WANG Xi’an CHENG Kegong LI Hulin NIU |
| author_sort | Xiuqin WANG |
| collection | DOAJ |
| description | On December 18, 2023, at 23:59, a magnitude Ms6.2 earthquake occurred in Jishishan County, Gansu Province, resulting in significant casualties and triggering numerous secondary geological disasters such as landslides and collapses. Utilizing high-resolution satellite imagery from before and after the earthquake, this study employs a MaxEnt model, constructed with visually interpreted disaster points and a set of impact factor characteristics, to assess the post-earthquake landslide hazard post-earthquake landslide hazard. The research conclusions are as follows: 1) Earthquake-induced landslide disasters are predominantly distributed within sunny slopes at elevations of 1800 to 2300 m and slope gradient of 20° to 25°, extensively across areas 1.5 km from roads, 1.7 km from fault zones, and within 5 km of the earthquake’s epicenter. The majority of the disasters occurred in cropland and loam areas with higher population density in the earthquake region. 2) The main influencing factors for earthquake-induced landslides determined by factor contribution rates, permutation importance, test benefit values, AUC values, and regularization training gain value were comprehensively determined as follows: Distance from the fault zone, Elevation, and Population density; 3) Based on the constructed MaxEnt model, it is found that there is a good consistency between the extremely high and high-risk areas of landslide disasters in the earthquake zone and the seismic intensity. Among them, the extremely high and high-risk areas are mainly distributed in the intensity Ⅷ zone, with an area of 5.368km2, accounting for 77.82% of the total area of the extremely high and high-risk zones. The low and very low-risk areas are mainly distributed in the intensity Ⅵ and Ⅶ zones, accounting for 92.80% of the total area of the study region. This study constructs the MaxEnt model based on the importance analysis of impact factors to evaluate the landslide hazard in the earthquake area, providing references for post-disaster reconstruction in the earthquake zone. |
| format | Article |
| id | doaj-art-9b28ebf7e6584cf2bd59c92ce7785841 |
| institution | OA Journals |
| issn | 1003-8035 |
| language | zho |
| publishDate | 2025-02-01 |
| publisher | Editorial Office of The Chinese Journal of Geological Hazard and Control |
| record_format | Article |
| series | Zhongguo dizhi zaihai yu fangzhi xuebao |
| spelling | doaj-art-9b28ebf7e6584cf2bd59c92ce77858412025-08-20T02:34:31ZzhoEditorial Office of The Chinese Journal of Geological Hazard and ControlZhongguo dizhi zaihai yu fangzhi xuebao1003-80352025-02-0136116918110.16031/j.cnki.issn.1003-8035.202405010202405010Risk assessment of landslides induced by the Ms6.2 earthquake in Jishishan, Gansu ProvinceXiuqin WANG0Quanfu NIU1Hao WANG2Xi’an CHENG3Kegong LI4Hulin NIU5The Map Institute of Gansu Province, Lanzhou, Gansu 730000, ChinaSchool of Civil Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, ChinaSchool of Civil Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, ChinaSchool of Civil Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, ChinaGansu Provincial Institute of Surveying and Mapping, Lanzhou, Gansu 730000, ChinaThe Third Geological and Mineral Exploration Institute of Gansu Provincial Geological and Mineral Exploration and Development Bureau, Lanzhou, Gansu 730050, ChinaOn December 18, 2023, at 23:59, a magnitude Ms6.2 earthquake occurred in Jishishan County, Gansu Province, resulting in significant casualties and triggering numerous secondary geological disasters such as landslides and collapses. Utilizing high-resolution satellite imagery from before and after the earthquake, this study employs a MaxEnt model, constructed with visually interpreted disaster points and a set of impact factor characteristics, to assess the post-earthquake landslide hazard post-earthquake landslide hazard. The research conclusions are as follows: 1) Earthquake-induced landslide disasters are predominantly distributed within sunny slopes at elevations of 1800 to 2300 m and slope gradient of 20° to 25°, extensively across areas 1.5 km from roads, 1.7 km from fault zones, and within 5 km of the earthquake’s epicenter. The majority of the disasters occurred in cropland and loam areas with higher population density in the earthquake region. 2) The main influencing factors for earthquake-induced landslides determined by factor contribution rates, permutation importance, test benefit values, AUC values, and regularization training gain value were comprehensively determined as follows: Distance from the fault zone, Elevation, and Population density; 3) Based on the constructed MaxEnt model, it is found that there is a good consistency between the extremely high and high-risk areas of landslide disasters in the earthquake zone and the seismic intensity. Among them, the extremely high and high-risk areas are mainly distributed in the intensity Ⅷ zone, with an area of 5.368km2, accounting for 77.82% of the total area of the extremely high and high-risk zones. The low and very low-risk areas are mainly distributed in the intensity Ⅵ and Ⅶ zones, accounting for 92.80% of the total area of the study region. This study constructs the MaxEnt model based on the importance analysis of impact factors to evaluate the landslide hazard in the earthquake area, providing references for post-disaster reconstruction in the earthquake zone.https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202405010jishishan ms6.2 earthquakelandslidefactorimportance analysismaxent modelrisk assessment |
| spellingShingle | Xiuqin WANG Quanfu NIU Hao WANG Xi’an CHENG Kegong LI Hulin NIU Risk assessment of landslides induced by the Ms6.2 earthquake in Jishishan, Gansu Province Zhongguo dizhi zaihai yu fangzhi xuebao jishishan ms6.2 earthquake landslide factor importance analysis maxent model risk assessment |
| title | Risk assessment of landslides induced by the Ms6.2 earthquake in Jishishan, Gansu Province |
| title_full | Risk assessment of landslides induced by the Ms6.2 earthquake in Jishishan, Gansu Province |
| title_fullStr | Risk assessment of landslides induced by the Ms6.2 earthquake in Jishishan, Gansu Province |
| title_full_unstemmed | Risk assessment of landslides induced by the Ms6.2 earthquake in Jishishan, Gansu Province |
| title_short | Risk assessment of landslides induced by the Ms6.2 earthquake in Jishishan, Gansu Province |
| title_sort | risk assessment of landslides induced by the ms6 2 earthquake in jishishan gansu province |
| topic | jishishan ms6.2 earthquake landslide factor importance analysis maxent model risk assessment |
| url | https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202405010 |
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