兰州市地质灾害群测群防点空间格局分布

针对地质灾害点空间格局分布定量性研究较少的问题,该文提出一种定量研究方法——空间扫描统计方法,以地质灾害群测群防点为基础数据库,分析兰州市地质灾害群测群防点空间格局分布。研究结果表明:(1)崩塌和不稳定斜坡聚集区相似,均在城关区呈现1类聚集,榆中县和永登县的部分乡镇呈2、3类聚集,4类聚集区均分布在红古区的部分街道;(2)滑坡和泥石流1类聚集区包括以西柳沟街道为中心的13个乡镇街道,4类聚集区都分布在红古区,而2、3类聚集区分布有较大的差异。该方法能定量表达各类型地质灾害点的空间聚集度。该文结论以期为兰州市地质灾害针对性地采取预防和控制手段。

Spatial distribution of geohazards group measurement and prevention points in Lanzhou city

Aiming at the problem that study on the quantitative distribution of geological hazard points spatial pattern is few,a method of quantitative research was put forward,which is space scan statistic method,on the basis of the geological hazard control group of test point database,Lanzhou city geological disaster monitoring measurement point spatial pattern of distribution was analyzed.Research results showed that:①the collapse and unstable slope zones were similar,both present the first aggregation type in Chengguan,and the second and third types of aggregationin Yuzhong county,and partial township in Yongdeng county,and the fourth types of clusters were distributed in the red part in the ancient streets;②landslide and debris flow type zones including Xiliugou streets centered 13 township streets,the fourth types of clusters were distributed in the red ancient zone,and the difference of distribution between second and third type was big.This method can quantitatively express the types of geological hazard points spatial concentration.Conclusion of this paper is able to provide preventive and control measures for Lanzhou geological disaster.