DOI: 10.2166/wcc.2014.031
论文题名: Statistical characteristics of rainfall in the Onkaparinga catchment in South Australia
作者: Mamunur Rashid M. ; Beecham S. ; Chowdhury R.K.
刊名: Journal of Water and Climate Change
ISSN: 20402244
出版年: 2015
卷: 6, 期: 2 起始页码: 352
结束页码: 373
语种: 英语
英文关键词: Hybrid distribution
; Madograms
; Precipitation concentration index
; Rainfall modelling
; Spatial and temporal variability
英文摘要: The main objective of this study was to investigate the statistical characteristics of point rainfall and the novelty of the work was the development of a hybrid probability distribution that can model the full spectrum of daily rainfall in the Onkaparinga catchment in South Australia. Daily rainfall data from 1960 to 2010 at 13 rainfall stations were considered. Spatial dependency among the rainfall maxima was assessed using madograms. Relatively strong and significant autocorrelation coefficients were observed for rainfall depths at finer (daily and monthly) temporal resolutions. The performance of different distribution models was examined considering their ability to regenerate various statistics such as standard deviation, skewness, frequency distribution, percentiles and extreme values. Model efficiency statistics of modelled percentiles of daily rainfall were found to be useful for optimum threshold selection in a hybrid of the gamma and generalized Pareto distributions. The hybrid and the mixed exponential distributions were found to be more efficient than any single distribution (Weibull, gamma and exponential) for simulating the full range of daily rainfall across the catchment. The outcomes from this study will assist water engineers and hydrologists to understand the spatial and temporal characteristics of point rainfall in the Onkaparinga catchment and will hopefully contribute to the improvement of rainfall modelling and downscaling techniques. © IWA Publishing 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67650
Appears in Collections: 气候减缓与适应
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作者单位: Centre for Water Management and Reuse, School of Natural and Built Environments, University of South Australia, Mawson Lakes, SA, Australia; School of Natural and Built Environments, University of South Australia, Mawson Lakes, SA, Australia; Department of Civil and Environmental Engineering, United Arab Emirates University, PO Box 15551, Al Ain, United Arab Emirates
Recommended Citation:
Mamunur Rashid M.,Beecham S.,Chowdhury R.K.. Statistical characteristics of rainfall in the Onkaparinga catchment in South Australia[J]. Journal of Water and Climate Change,2015-01-01,6(2)