摘要
根据陕西省延安市吴起县地质灾害详细调查成果,对区内73处地质灾害隐患点的调查数据进行了统计分析。总结了吴起县滑坡、崩塌特征,探讨了吴起县斜坡坡型、坡度、坡高和坡向对滑坡、崩塌发生的控制作用,得出了斜坡几何形态与滑坡、崩塌的相关性规律。结果表明:吴起县地质灾害隐患点中,凸型和直线型坡更容易形成滑坡或崩塌,凹型和阶梯型坡相对稳定。当斜坡的坡度在30°~40°、坡高在40~70 m时,主要发育滑坡;当斜坡的坡度大于60°、坡高在30~50 m时,主要发育崩塌;且滑坡、崩塌的平均高度约为各自所处斜坡坡高的3/4。滑坡、崩塌灾害阳坡较阴坡发育,其坡向主要分布在90°~180°、240°~270°之间。分析结论为该县防灾减灾工作提供了一定的参考价值。
According to the detailed investigation results of geological disasters in Wuqi County,Yan an City,Shaanxi Province,the survey data of 73 geological hazard points were analyzed in the region.The characteristics of landslide and collapse in Wuqi County were summarized.The slope type,gradient,height and direction to the control of the landslide,collapse in Wuqi County were discussed.Then the correlation rules between the slope geometrical morphology and landslide,collapse were obtained.The results show that the convex and linear slopes are easier to form landslide or collapse than the concave and ladder type slopes.Landslides mainly occur in the gradient of 30°~40°,the slope height of 40~70m.Collapses mainly occur in the gradient of greater than 60°,the slope height of 30~50m.And the average height of landslide and collapse is respectively about 3/4 of the slope height.Landslide and collapse disasters are more developmental in sunny slope than shady slope.Their slope directions are mainly in 90°~180°,240°~270°in the geological hazard points of Wuqi County.The conclusions of the analysis can provide some reference values for disaster prevention and mitigation work in the county.
作者
姜建伟
赵法锁
祝俊华
祝艳波
JIANG Jianwei;ZHAO Fasuo;ZHU Junhua;ZHU Yanbo(School of Geological Engineering and Geomatics,Chang an University,Xi'an 710054,China)
出处
《灾害学》
CSCD
北大核心
2018年第2期188-192,共5页
Journal of Catastrophology
基金
国家自然科学基金资助项目(41502278)
陕西省自然科学基金(2017JQ4021)
关键词
斜坡
几何形态
滑坡
崩塌
地质灾害相关性
陕西吴起县
slope
geometrical morphology
landslide
collapse
correlation of geological disasters
Wuqi County of Shaanxi Province
