灾害学2024，Vol.39Issue(4)：207-212,6.DOI:10.3969/j.issn.1000-811X.2024.04.030
2001-2022年陕北黄土地区地质灾害时空分布及引发因素分析
Spatial and Temporal Distribution and Analysis of Triggering Factors of Geologic hazards in the Loess Area of Northern Shaanxi from 2001 to 2022
摘要
Abstract
Based on the geological disaster data of Shaanxi Province from 2001 to 2022,the spatial and temporal distri-bution patterns and triggering factors of loess geological disasters in Yulin and Yan′an over the past 22 years are analyzed and studied,and suggestions for preventive and curative measures are put forward,providing a referenceable basis for the pre-vention and control of geological disasters in Shaanxi Province and even in the Northwest Loess Plateau.① Spatially the hardest-hit areas are distributed in an arc-shaped belt,mainly in Qingjian,Suide and Zizhou counties in Yulin,and in Baota,Anse and Zhidan counties in Yan'an.Geological hazards are mainly developed in hilly areas,on both sides of tribu-taries and at the confluence of rivers.② In time,it mainly occurs in the freezing and thawing season and flood season,of which March and July-October are the high incidence of geologic disasters,and July-August is the concentrated period of outbreaks,resulting in the most serious disasters.③Precipitation and artificial slope cutting are the main factors triggering geohazards.④Prevention and control,Yulin,Yan'an in March each year and the flood season from July to October is the key preventive period,the arc zone is the key preventive area,should be strengthened inspection and investigation,moni-toring and early-warning,comprehensive management,publicity and training and other comprehensive prevention and con-trol measures;Yulin 5d cumulative precipitation in the first 76 mm or so,the forecast precipitation of 37 mm,Yan'an area in the first 5d cumulative precipitation in the first 79 mm or so,the forecast precipitation of 42 mm When the accumulated precipitation in the first 5d in Yulin is about 76 mm and the forecasted precipitation is 37 mm,and when the accumulated precipitation in the first 5d in Yan'an is about 79 mm and the forecasted precipitation is 42 mm,a forecast and warning is issued.关键词
地质灾害/时空分布/致灾因素/防治措施/陕北黄土地区Key words
geologic hazards/spatio-temporal distribution/triggering factors/prevention and control measures/Northern Shaanxi Loess Area分类
天文与地球科学引用本文复制引用
吕文茜,王雁林,陈新建,李永红,李惟惟,叶孟沅..2001-2022年陕北黄土地区地质灾害时空分布及引发因素分析[J].灾害学,2024,39(4):207-212,6.基金项目
国家自然科学基金项目"黄土边坡的地质结构界面效应及其促滑机制研究"(41877247) （41877247）
