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青海西宁南北山滑坡、崩塌成因及影响分析

魏正发 张俊才 曹小岩 魏赛拉加 严慧珺

魏正发, 张俊才, 曹小岩, 魏赛拉加, 严慧珺. 青海西宁南北山滑坡、崩塌成因及影响分析[J]. 中国地质灾害与防治学报, 2021, 32(4): 47-55. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-07
引用本文: 魏正发, 张俊才, 曹小岩, 魏赛拉加, 严慧珺. 青海西宁南北山滑坡、崩塌成因及影响分析[J]. 中国地质灾害与防治学报, 2021, 32(4): 47-55. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-07
Zhengfa WEI, Juncai ZHANG, Xiaoyan CAO, Sailajia WEI, Huijun YAN. Causes and influential factor analysis of landslides and rockfalls in north & south mountain areas of Xining City, Qinghai Province[J]. The Chinese Journal of Geological Hazard and Control, 2021, 32(4): 47-55. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-07
Citation: Zhengfa WEI, Juncai ZHANG, Xiaoyan CAO, Sailajia WEI, Huijun YAN. Causes and influential factor analysis of landslides and rockfalls in north & south mountain areas of Xining City, Qinghai Province[J]. The Chinese Journal of Geological Hazard and Control, 2021, 32(4): 47-55. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-07

青海西宁南北山滑坡、崩塌成因及影响分析

doi: 10.16031/j.cnki.issn.1003-8035.2021.04-07
基金项目: 青海省应用基础研究项目(2019-ZJ-7053)
详细信息
    作者简介:

    魏正发(1993-),男,青海互助人,本科,工程师,主要从事地灾调查与防治研究工作。E-mail:1522497033@qq.com

  • 中图分类号: P642

Causes and influential factor analysis of landslides and rockfalls in north & south mountain areas of Xining City, Qinghai Province

  • 摘要: 近年来,随着青藏高原暖湿化加剧,降雨量及极端降雨天气增多等原因,西宁市南北山地质灾害呈多发群发、逐年增长态势,尤其是滑坡、崩塌灾害,造成了严重的人员伤亡和经济损失,严重威胁西宁市区居民、基础设施、绿化设施安全。为积极应对南北山地质灾害严峻形势,保障居民生活生产安全,巩固已有来之不易的绿化成果,深入分析了西宁市南北山近18年以来地质灾害发生情况、分布规律及影响因素,提出了南北山地质灾害重点预防时期、重点防范区域、对绿化区的影响及后期防治建议。
  • 图  1  西宁市山区、河谷及地质灾害多发地段分布简图

    Figure  1.  Sketch map of mountainous area,river valley and geological disaster prone area in Xining City

    图  2  2017年8月8日王家庄绿化区滑坡

    Figure  2.  Landslide in Wangjiazhuang green area in 8 August 2017

    图  3  2019年11月18日付家寨绿化区滑坡

    Figure  3.  Landslide in Fujiazhai green area in 18 November 2019

    图  4  西宁市北山寺地区湟水河IV基座阶地

    Figure  4.  IV base terrace of Huangshui River in north mountains of Xining City

    图  5  滑坡、崩塌与坡度关系图

    Figure  5.  The relation diagram between landslide,collapse and slope

    图  6  新近系泥岩石膏与砂岩互层岩层(北山)

    Figure  6.  Interbedded strata of tertiary mudstone,plaster and sandstone(north mountains)

    图  7  2002—2019年年均降雨量与地质灾害关系图

    Figure  7.  The relationship between the average annual rainfall and geological disasters from 2002 to 2019

    图  8  2002—2019年月平均降雨量与地质灾害关系对比图

    Figure  8.  Comparison chart of average rainfall from 2002 to 2019 and monthly geological disasters

    图  9  西宁市地层岩性及地质灾害分布简图

    Figure  9.  Sketch map of stratum lithology and geological disasters distribution in Xining City

    图  10  北山上部陡崖及下部缓坡地形

    Figure  10.  Topography of the upper escarpment and lower gentle slope of north mountains

    表  1  1979—2019年西宁市泥石流一览表

    Table  1.   List of debris flow in Xining City from 1979—2019

    发生时间地区规模/(104 m3人员经济损失/万元
    1979付家寨片区/002.71
    1987瓦窑沟流域/001000
    1994-07-05马坊、盐庄及大寺沟20.73212250
    1995-09-03沙巴沟0.14912250
    1997-08-05瓦窑沟2.4001200
    1997-08-05一颗印大山沟3.5231125
    1997-08-05付家寨4.1250310
    下载: 导出CSV

    表  2  西宁市南北山典型地质灾害基本情况一览表

    Table  2.   List of basic information of typical geological hazards in north and south mountains of Xining City

    发生日期灾害名称体积/m3人员伤亡其它损失直接经济损失/万元
    2006-08-19付家寨绿化区滑坡31.6800130亩林地、16.59万株苗木,0.5 km道路、2 km供水管网、10座闸阀井及3间管护房损毁163.45
    2015-06-24付家寨绿化区滑坡2.7200绿化区林木、道路和管护基地房屋等损毁200
    2017-08-08王家庄绿化区滑坡4.684011间管理用房掩埋及供电等设施损毁81
    2019-07-04朝阳绿化区滑坡7.2003条灌溉管网断裂,200 m绿化专用道路损毁50
    2019-11-05朝阳绿化区滑坡1200两处墓地损毁,电塔沉陷,网围栏被埋30
    2019-11-18付家寨绿化区滑坡39.4200绿化道路600 m,管护房10间损毁22.5
    下载: 导出CSV

    表  3  斜坡要素对滑坡、崩塌影响统计表

    Table  3.   Statistical table of influence of slope elements on landslide and collapse

    地质灾害坡形坡度/(°)坡向/(°)
    凸起形阶梯形直线形20~3030-4040~5050~6060~7070~8080~90阳坡
    90~270
    阴坡
    270~90
    滑坡数量960242303677475439
    占比/%9.764.525.82.232.338.77.57.54.37.558.141.9
    崩塌数量280400011228293
    占比/%87.5012.50003.13.16.387.590.69.4
    下载: 导出CSV

    表  4  2002—2019年西宁市南北山地质灾害发生起数按月份统计表

    Table  4.   Monthly statistics on the occurrence of geological disasters in the north and south mountains of Xining City from 2002 to 2019

    月份123456789101112
    灾害起数92711914202713481
    下载: 导出CSV
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  • 收稿日期:  2020-10-09
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  • 网络出版日期:  2021-10-11
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