Spatial and Temporal Distribution of Geologic Hazards in Shaanxi Province

The spatio-temporal distribution of geological hazards, including collapses, landslides, and debris flows, in Shaanxi province, China was studied based on data from 1951 to 2018. The potential impact factors, including the geomorphologic types, rivers, roads, rainfall, and earthquakes, were analyzed...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Shizhengxiong Liang, Dong Chen, Donghuan Li, Youcun Qi, Zhanfeng Zhao
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	geological hazards spatio-temporal distribution impact factors Shaanxi province rainfall threshold Science Q
Acceso en línea:	https://doaj.org/article/2e5d32c7c66d4d6688a41160ccee4871
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:2e5d32c7c66d4d6688a41160ccee4871
record_format	dspace
spelling	oai:doaj.org-article:2e5d32c7c66d4d6688a41160ccee48712021-11-11T18:51:54ZSpatial and Temporal Distribution of Geologic Hazards in Shaanxi Province10.3390/rs132142592072-4292https://doaj.org/article/2e5d32c7c66d4d6688a41160ccee48712021-10-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/21/4259https://doaj.org/toc/2072-4292The spatio-temporal distribution of geological hazards, including collapses, landslides, and debris flows, in Shaanxi province, China was studied based on data from 1951 to 2018. The potential impact factors, including the geomorphologic types, rivers, roads, rainfall, and earthquakes, were analyzed using Random Forests. The results indicated that most hazards occurred in summer (i.e., July–September) and were triggered by rainstorms. The freeze–thaw effect had a considerable contribution to hazards in the north. Spatially, most hazards in the north occurred in valley terraces of the Loess Plateau, while medium-relief terrane (relief ranged from 500 to 1000 m) in the southern Qinling Mountains were hazard-prone areas. The collapses and landslides were mainly affected by human factors in Northern Shaanxi, whereas in Southern Shaanxi geomorphology was the primary factor. Permeability was a dominant factor for debris flows. In addition, the 2008 Wenchuan earthquake had a remarkable influence on the spatial distribution of hazards. In contrast, for the situation in the Sichuan province, which was close to the earthquake epicenter, the Wenchuan earthquake triggered many collapse and landslide events in the southwest regions of Shaanxi province only on 12 May 2008. The thresholds for the three hazard types in the north and south regions were almost the same despite their distinctly different geologic characteristics. Through a sensitivity analysis, we found an appropriate dry period of 12 h for the area.Shizhengxiong LiangDong ChenDonghuan LiYoucun QiZhanfeng ZhaoMDPI AGarticlegeological hazardsspatio-temporal distributionimpact factorsShaanxi provincerainfall thresholdScienceQENRemote Sensing, Vol 13, Iss 4259, p 4259 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	geological hazards spatio-temporal distribution impact factors Shaanxi province rainfall threshold Science Q
spellingShingle	geological hazards spatio-temporal distribution impact factors Shaanxi province rainfall threshold Science Q Shizhengxiong Liang Dong Chen Donghuan Li Youcun Qi Zhanfeng Zhao Spatial and Temporal Distribution of Geologic Hazards in Shaanxi Province
description	The spatio-temporal distribution of geological hazards, including collapses, landslides, and debris flows, in Shaanxi province, China was studied based on data from 1951 to 2018. The potential impact factors, including the geomorphologic types, rivers, roads, rainfall, and earthquakes, were analyzed using Random Forests. The results indicated that most hazards occurred in summer (i.e., July–September) and were triggered by rainstorms. The freeze–thaw effect had a considerable contribution to hazards in the north. Spatially, most hazards in the north occurred in valley terraces of the Loess Plateau, while medium-relief terrane (relief ranged from 500 to 1000 m) in the southern Qinling Mountains were hazard-prone areas. The collapses and landslides were mainly affected by human factors in Northern Shaanxi, whereas in Southern Shaanxi geomorphology was the primary factor. Permeability was a dominant factor for debris flows. In addition, the 2008 Wenchuan earthquake had a remarkable influence on the spatial distribution of hazards. In contrast, for the situation in the Sichuan province, which was close to the earthquake epicenter, the Wenchuan earthquake triggered many collapse and landslide events in the southwest regions of Shaanxi province only on 12 May 2008. The thresholds for the three hazard types in the north and south regions were almost the same despite their distinctly different geologic characteristics. Through a sensitivity analysis, we found an appropriate dry period of 12 h for the area.
format	article
author	Shizhengxiong Liang Dong Chen Donghuan Li Youcun Qi Zhanfeng Zhao
author_facet	Shizhengxiong Liang Dong Chen Donghuan Li Youcun Qi Zhanfeng Zhao
author_sort	Shizhengxiong Liang
title	Spatial and Temporal Distribution of Geologic Hazards in Shaanxi Province
title_short	Spatial and Temporal Distribution of Geologic Hazards in Shaanxi Province
title_full	Spatial and Temporal Distribution of Geologic Hazards in Shaanxi Province
title_fullStr	Spatial and Temporal Distribution of Geologic Hazards in Shaanxi Province
title_full_unstemmed	Spatial and Temporal Distribution of Geologic Hazards in Shaanxi Province
title_sort	spatial and temporal distribution of geologic hazards in shaanxi province
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/2e5d32c7c66d4d6688a41160ccee4871
work_keys_str_mv	AT shizhengxiongliang spatialandtemporaldistributionofgeologichazardsinshaanxiprovince AT dongchen spatialandtemporaldistributionofgeologichazardsinshaanxiprovince AT donghuanli spatialandtemporaldistributionofgeologichazardsinshaanxiprovince AT youcunqi spatialandtemporaldistributionofgeologichazardsinshaanxiprovince AT zhanfengzhao spatialandtemporaldistributionofgeologichazardsinshaanxiprovince
_version_	1718431693553008640

Spatial and Temporal Distribution of Geologic Hazards in Shaanxi Province

Ejemplares similares