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2017 | 26 | 2 |

Tytuł artykułu

Applying time series and a non-parametric approach to predict pattern, variability, and number of rainy days per month

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In the past 100 years, the annual global temperature has increased by almost 0.5ºC and is expected to increase further with time. This increase in temperature negatively affects the management of water resources globally as well as locally. Rain is an important phenomenon for agriculture, particularly in hilly areas where there is no feasible irrigation system. The present study is concerned with the analysis and modeling of the rain pattern, its variability, and prediction of monthly number of rainy days for the Abbottabad District, which is considered to be one of the greenest and most beautiful areas of Khyber Pakhtunkhwa, Pakistan, by incorporating both parametric and nonparametric techniques. Non-parametric statistical techniques are used for movement detection and significance testing; in this context, statistical tests were incorporated for inspection of homogeneity of rainy days among successive periods. A time series data for the period 1971-2013 was analyzed. Box Jenkins methodology and time series decomposition were applied for fitting the selected model, which was assessed for forecasting the monthly number of rainy days for 2015-2020. In this study several time series parametric and non-parametric approaches were applied to model rainfall data. The results showed that SARIMA (1, 0, 1) (0, 1, 1) was a better choice in predicting the monthly number of rainy days. Further analysis of the data suggests that January, March, May, July, and December have a considerable declining tendency in the number of rainy days.

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Opis fizyczny



  • Department of Statistics University of Peshawar
  • M.Phil Scholar Department of Statistics Allama Iqbal Open University Islamabad
  • Department of Statistics Abdul Wali Khan University Mardan
  • Department of Statistics Islamia College University Peshawar
  • Department of Statistics Shaheed Benazir Bhutto Women University Peshawar
  • Department of Economics, Kohat University of Science and Technology, Kohat


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