Abstract
The estimation of snow hazard and load faces the small sample size effect because of the short snow depth record at a station. To reduce such an effect, we propose to estimate the return period value of the annual maximum ground snow depth S, sT, for Canada sites by applying the regional frequency analysis (RFA) and the region of influence approach (ROIA). The use of RFA and ROIA to map Canadian snow hazard is new. The comparison of their performance for snow hazard mapping has not been explored in the literature. We also consider the at-site analysis approach (ASA) for estimating sT by using three often used probability distributions for S. A comparison of the estimated sT by using the three approaches (ASA, RFA, ROIA) indicates that there is considerable scatter between the estimated sT value although the identified overall spatial trends of sT are similar. It is shown that the two-parameter lognormal distribution for S at most Canadian sites, based on the at-site analysis, is preferred; this differs from the Gumbel distribution used to develop the design snow load in Canadian structural design code. The new findings indicate that it is valuable to consider the lognormal distribution for developing design snow load for Canadian sites.
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Data availability statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request. These include some of the distribution parameters and estimated return period values.
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Acknowledgements
HMM gratefully acknowledges the scholarship (Number 201206120219) received from the China Scholarship Council and funding received from the National Natural Science Foundation of China (No. 51808169 and 51927813). Funding received from the Natural Sciences and Engineering Research Council of Canada (RGPIN-2016-04814) is acknowledged. We thank two anonymous reviewers for their constructive comments and suggestions on the earlier draft of this paper.
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Mo, H.M., Ye, W. & Hong, H.P. Estimating and mapping snow hazard based on at-site analysis and regional approaches. Nat Hazards 111, 2459–2485 (2022). https://doi.org/10.1007/s11069-021-05144-3
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DOI: https://doi.org/10.1007/s11069-021-05144-3