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A comparison of statistical and machine learning methods for debris flow susceptibility mapping

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Abstract

Debris flows destroys the facilities and seriously threatens human lives, especially in mountainous area. Susceptibility mapping is the key for hazard prevention. The aim of the present study is to compare the performance of three methods including Bayes discriminant analysis (BDA), logistic regression (LR) and random forest (RF) for debris flow susceptibility mapping from three aspects: applicability, analyticity and accuracy. Nyalam county, a debris flow-prone area, located in Southern Tibet, was selected as the study area. Firstly, the dataset containing 49 debris flow inventories and 16 conditioning factors was prepared. Subsequently, divided the dataset into two groups with a ratio of 70/30 for training and validation purposes, and repeated 5 times to obtain 5 different groups. Then, 16 factors were involved in the modeling of RF, of which 11 factors with low linear correlation were for BDA and LR. Finally, receiver operating characteristic curves, the area under curve (AUC) and contingency tables were applied to evaluated the accuracy performance of the 3 models. The prediction rates were 74.6–81.8%, 74.6–83.6% and 80–92.7%, for the BDA, LR and FR, while the AUC values of three models were 0.72–0.78, 0.82–0.92 and 0.90–0.99, respectively. Compare to LR an BDA, RF not only effectively process and preserved dataset without priori assumption and the obtained susceptibility zoning map and major factors were reasonable. The conclusion of the current study is useful for risk mitigation and land use planning in the study area and provide related references to other researches.

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Abbreviations

BDA:

Bayes discriminant analysis

LR:

Logistic regression

RF:

Random forest

ROC:

Relative operating characteristic

AUC:

Area under curve

DFS:

Debris flow susceptibility

GPS:

Global positioning systems

GIS:

Geographic information systems

RS:

Remote sensing

DEM:

Digital elevation model

SRTM:

Shuttle Radar Topography Mission

Sig:

Significant parameter value

OOB:

Out of bag

AGMC:

Average gradient of main channel

MED:

Maximum elevation difference

MODIS:

Moderate-resolution Imaging Spectroradiometer

ASA:

Average slope angle

RED:

Relative cutting depth

FL:

Fault length

FD:

Fault density

DTF:

Distance to fault

NDVI:

Normalized difference vegetation index

MCL:

Main channel length

DD:

Drainage density

DTR:

Distance to road

VIF:

Variance inflation factor

FR:

Frequency ratio

TP:

True positives

TN:

True negatives

FP:

False positives

FN:

False negatives

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 41572257 and 41972267).

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Correspondence to Chang-Ming Wang.

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Liang, Z., Wang, CM., Zhang, ZM. et al. A comparison of statistical and machine learning methods for debris flow susceptibility mapping. Stoch Environ Res Risk Assess 34, 1887–1907 (2020). https://doi.org/10.1007/s00477-020-01851-8

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  • DOI: https://doi.org/10.1007/s00477-020-01851-8

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