IGSNRR OpenIR
How sample size can effect landslide size distribution
Li,Langping1; Lan,Hengxing1,2; Wu,Yuming1
2016-10-23
Source PublicationGeoenvironmental Disasters
ISSN2197-8670
Volume3Issue:1
Corresponding AuthorLan,Hengxing(lanhx@igsnrr.ac.cn)
AbstractAbstractBackgroundLandslide size distribution is widely found to obey a negative power law with a rollover in the smaller size, and has been exploited by many researchers to inspect landside physics or to assess landslide erosion and landslide hazard. Yet, sample size has effect on the statistics of landslide size even though we manage to avoid complications associated with landslide datasets and statistical treatments.ResultsIn this paper, a series of stochastic simulations were implemented to explicitly and systematically quantify the effect of sample size. The results show that, the errors of parameters estimated based on small sample size can be considerably large. For a sample size of 100, the relative error of the estimated landslide erosion rate that has a probability of 50?% can approach 100?%. In addition, small sample size also obscures the statistical significance of the variances in parameters between different subsets of the same dataset. Although inconsistency was found regarding how the power exponent varies with rainfall intensity, numerical results suggest that the variance observed in a dataset with a small sample size may be not statistically significant.ConclusionsThis paper not only reveals the potential effect of sample size on exploiting landslide size distribution but also presents procedures for quantifying this issue in future studies.
KeywordLandslide size distribution Sample size Statistical significance Power law Rollover
DOI10.1186/s40677-016-0052-y
Language英语
WOS IDBMC:10.1186/s40677-016-0052-y
PublisherSpringer International Publishing
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Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/67813
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLan,Hengxing
Affiliation1.State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences
2.University of Alberta; Department of Civil and Environmental Engineering
Recommended Citation
GB/T 7714
Li,Langping,Lan,Hengxing,Wu,Yuming. How sample size can effect landslide size distribution[J]. Geoenvironmental Disasters,2016,3(1).
APA Li,Langping,Lan,Hengxing,&Wu,Yuming.(2016).How sample size can effect landslide size distribution.Geoenvironmental Disasters,3(1).
MLA Li,Langping,et al."How sample size can effect landslide size distribution".Geoenvironmental Disasters 3.1(2016).
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