Statistical Analysis of Rainfall Pattern in Dire Dawa Eastern Ethiopia
| dc.contributor.advisor | Gotu, Butte(PhD) | |
| dc.contributor.author | Takele, Rediat | |
| dc.date.accessioned | 2018-06-27T11:03:52Z | |
| dc.date.accessioned | 2023-11-09T14:30:01Z | |
| dc.date.available | 2018-06-27T11:03:52Z | |
| dc.date.available | 2023-11-09T14:30:01Z | |
| dc.date.issued | 2012-12 | |
| dc.description.abstract | This paper investigated the rainfall pattern of Dire Dawa, Eastern Ethiopia. Descriptive Statistics, spectrum analysis, cross-spectral analysis as well as univariate Box-Jenkins methodology to build Seasonal ARIMA model were used with the objective to analyze rainfall pattern in Dire Dawa for the period from January, 1982-December, 2011 based on data from Dire Dawa and adjacent stations: Dengego and Haramaya. Descriptive Statistics result shows that the mean annual rainfall of Dire Dawa, Dengego and Haramaya are 611mm, 774 mm and 772mm, respectively. The amount of rainfall at Dengego and Haramaya are more or less the same on average in all seasons, and are much higher than that of Dire Dawa over the study period. The variability of annual rainfall in Dire Dawa during the last 30-year period is a bit larger than neighboring station‟s rainfall (Dengego and Haramaya), indicating that climate instability is high in Dire Dawa than other stations. A time series model for Dire Dawa station was adjusted, processed, diagnostically checked and lastly an ARIMA (5, 0, 0)*(0, 1, 1)12 model is established and this model is used to forecast two years monthly rainfall value. The results indicate that relatively there is a tendency of increasing trend for forecasted rainfall values. Spectrum analysis result showed that a rainfall extreme event recurs every 2.5 years in Dire Dawa. Further results indicated that rainfall pattern of Dengego and Dire Dawa are found to be more related | en_US |
| dc.identifier.uri | http://10.90.10.223:4000/handle/123456789/4118 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Abeba university | en_US |
| dc.subject | Rainfall Pattern in Dire Dawa | en_US |
| dc.title | Statistical Analysis of Rainfall Pattern in Dire Dawa Eastern Ethiopia | en_US |
| dc.type | Thesis | en_US |