Spatio-Temporal Analysis of Rainfall Variability and Meteorological Drought: A Case Study in Bilate River Basin, Southern Rift Valley, Ethiopia

Tamrat Lolaso Moloro
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Tamrat Lolaso Moloro: Degree of Master of Science in Meteorology and Hydrology, Ethiopia

International Journal of Environmental Sciences & Natural Resources, 2018, vol. 14, issue 4, 76-89

Abstract: Rainfall always plays a deciding role in sustainable agricultural production. This research attends to analyzes variation of rainfall, examine trends of rainfall, evaluate the relationship between ENSO and rainfall variability, and analyzes meteorological drought in Bilate River Basin. The Bilate River Basin includes the portion of SNNPRS regional zones; Hadiya, Kanibate Tembaro, Gurage, Silte, Wolaita, Sidama, and Alaba special woreda and small parts of the South-central Oromiya Regional states. The analysis was done based on historical recorded rainfall data, 26 to 40 years (1974-2013) and ENSO data. Rainfall variability were analyzed through using basic statistics like mean, standard deviation, and coefficients of variation and trend were analyzed by non-parametric Mann-Kendall test methods. From the analysis Butajira both in Belg and Kiremt season rainfall were significant at α=.1, α=.05, α =.01 level with critical statistic table value 1.645, 1.96, and 2.576 respectively. In addition to this, in Shone annual and Belg seasons were significant. In the study area El Niño enhances rainfall activities and La Niña periods lowering rainfall.

Keywords: earth and environment journals; environment journals; open access environment journals; peer reviewed environmental journals; open access; juniper publishers; ournal of Environmental Sciences; juniper publishers journals; juniper publishers reivew (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:adp:ijesnr:v:14:y:2018:i:4:p:76-89

DOI: 10.19080/IJESNR.2018.14.555891

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