Frequency analysis of annual maximum rainfall series of fifteen meteorological observatories of Sindh, Pakistan
| Autor: | Muhammad Shafeeq ul Rehman Khan, Uzma Nawaz, Zamir Hussain, Maryum Nisar, Imran Rafi Khan |
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| Rok vydání: | 2021 |
| Předmět: |
Independent and identically distributed random variables
Series (stratigraphy) Frequency analysis 010504 meteorology & atmospheric sciences Autocorrelation Generalized logistic distribution 010502 geochemistry & geophysics 01 natural sciences law.invention law Homogeneous Statistics General Earth and Planetary Sciences Statistic 0105 earth and related environmental sciences General Environmental Science Quantile Mathematics |
| Zdroj: | Arabian Journal of Geosciences. 14 |
| ISSN: | 1866-7538 1866-7511 |
| Popis: | The study is an application of L-moments based regional frequency analysis using annual maximum rainfall series of fifteen sites of Sindh, Pakistan. Initial screening reveals that the observed data series at each site has no serial correlation and is randomly and identically distributed. The discordancy measure (Di) show that none of the site in a group of fifteen sites is discordant. The regional heterogeneity measure (H) shows that the region of fifteen sites is homogeneous. L-moment ratio diagram and |ZDIST| statistic are in favor of generalized logistic distribution (GLO) as best-fitted regional distribution. Parameters of GLO distribution and regional as well as at-site quantiles for various return periods have been estimated. Results show that the estimated quantiles of each site are greater than the average values of observed data series at corresponding sites. Random forest regression has been used for the estimation of quantiles at ungauged sites. |
| Databáze: | OpenAIRE |
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