Constrained scaling approach for design rainfall estimation

Yue Ping Xu*, Yeou-Koung Tung

*Corresponding author for this work

研究成果: Article同行評審

14 引文 斯高帕斯(Scopus)

摘要

Rainfall depth (or intensity) of the same frequency should follow a non-decreasing relationship with rainfall duration. However, due to the use of finite samples and sampling error, rainfall frequency analysis could yield rainfall intensity (depth)-frequency (IDF, DDF) curves of different durations that might intersect among them. Results of this kind violate physical reality and it is more likely to occur when rainfall record length gets shorter. To ensure the compliance of the physical reality, this paper applied the scale-invariant approach, in conjunction with constrained regression analysis, to circumvent intersections in rainfall IDF or DDF curves. Rainfall data of various durations at rain gauge in Hong Kong are used to demonstrate the procedure. Numerical investigation indicates that the proposed procedure yields more reasonable results than those based on the conventional frequency analysis, especially when only a small sample of data are available.

原文English
頁(從 - 到)697-705
頁數9
期刊Stochastic Environmental Research and Risk Assessment
23
發行號6
DOIs
出版狀態Published - 1 八月 2009

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