Dry lands are traditionally used and managed by a pastoralist, characterized by variable precipitation, climate variability and water scarcity. Change in rainfall trend and variability’s lead to severe production deficit and decline the balance between pasture and livestock on which pastoral livelihood depends on. The study was undertaken to assess the variability and trends of rainfall in Borana pastoral area using monthly rainfall record for the period 1987-2016 of Yabello and Eel-wayye station. Rainfall variability analysis has been done using variability indices like, coefficient of variation, precipitation concentration index and Standard anomaly index. Trend analysis was carried out using Man-Kendall trend test 5% significance level. The coefficient variation of the study area for Yabello was 21.2%, while for Eel-wayye it was 53% which showed high inter-annual variability. The negative anomalies at Yabello station was 53.3% While in Eel-wayye station, revealed 56%. The analysis result indicted that the rainfall concentration index value ranged from 13.2 to 30.23 for the stations which shows moderate to strong irregularly rainfall distribution. The year 2006 was the most drastic and distinct-wide extreme drought episode in both stations, Except short rainy season at Eel-wayye station, the Mann–Kendal test shows not statistically significant (P<0.05). Increasing tendencies of drought during main rainy season and decreasing tendencies of drought during short rainy season and annually were observed in the study area. This threats the livestock production systems, which is the backbone of the pastorals livelihood. The study, suggests policy makers to develop other sustainable water sources for lowlands pastorals.
| Published in | International Journal of Environmental Monitoring and Analysis (Volume 10, Issue 1) |
| DOI | 10.11648/j.ijema.20221001.13 |
| Page(s) | 16-25 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2024. Published by Science Publishing Group |
Borana, Rainfall Trend, Variability, Standard Anomaly Index, Precipitation Concentration Index
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APA Style
Gelgelo Wako Duba. (2022). Rainfall Trend and Variability Analysis in Borana Pastoral Lowland Areas: The Case of Yabello and Eel-wayye Station, Southern Ethiopia. International Journal of Environmental Monitoring and Analysis, 10(1), 16-25. https://doi.org/10.11648/j.ijema.20221001.13
ACS Style
Gelgelo Wako Duba. Rainfall Trend and Variability Analysis in Borana Pastoral Lowland Areas: The Case of Yabello and Eel-wayye Station, Southern Ethiopia. Int. J. Environ. Monit. Anal. 2022, 10(1), 16-25. doi: 10.11648/j.ijema.20221001.13
AMA Style
Gelgelo Wako Duba. Rainfall Trend and Variability Analysis in Borana Pastoral Lowland Areas: The Case of Yabello and Eel-wayye Station, Southern Ethiopia. Int J Environ Monit Anal. 2022;10(1):16-25. doi: 10.11648/j.ijema.20221001.13
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Download@article{10.11648/j.ijema.20221001.13,
author = {Gelgelo Wako Duba},
title = {Rainfall Trend and Variability Analysis in Borana Pastoral Lowland Areas: The Case of Yabello and Eel-wayye Station, Southern Ethiopia},
journal = {International Journal of Environmental Monitoring and Analysis},
volume = {10},
number = {1},
pages = {16-25},
doi = {10.11648/j.ijema.20221001.13},
url = {https://doi.org/10.11648/j.ijema.20221001.13},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijema.20221001.13},
abstract = {Dry lands are traditionally used and managed by a pastoralist, characterized by variable precipitation, climate variability and water scarcity. Change in rainfall trend and variability’s lead to severe production deficit and decline the balance between pasture and livestock on which pastoral livelihood depends on. The study was undertaken to assess the variability and trends of rainfall in Borana pastoral area using monthly rainfall record for the period 1987-2016 of Yabello and Eel-wayye station. Rainfall variability analysis has been done using variability indices like, coefficient of variation, precipitation concentration index and Standard anomaly index. Trend analysis was carried out using Man-Kendall trend test 5% significance level. The coefficient variation of the study area for Yabello was 21.2%, while for Eel-wayye it was 53% which showed high inter-annual variability. The negative anomalies at Yabello station was 53.3% While in Eel-wayye station, revealed 56%. The analysis result indicted that the rainfall concentration index value ranged from 13.2 to 30.23 for the stations which shows moderate to strong irregularly rainfall distribution. The year 2006 was the most drastic and distinct-wide extreme drought episode in both stations, Except short rainy season at Eel-wayye station, the Mann–Kendal test shows not statistically significant (P<0.05). Increasing tendencies of drought during main rainy season and decreasing tendencies of drought during short rainy season and annually were observed in the study area. This threats the livestock production systems, which is the backbone of the pastorals livelihood. The study, suggests policy makers to develop other sustainable water sources for lowlands pastorals.},
year = {2022}
}
TY - JOUR T1 - Rainfall Trend and Variability Analysis in Borana Pastoral Lowland Areas: The Case of Yabello and Eel-wayye Station, Southern Ethiopia AU - Gelgelo Wako Duba Y1 - 2022/03/09 PY - 2022 N1 - https://doi.org/10.11648/j.ijema.20221001.13 DO - 10.11648/j.ijema.20221001.13 T2 - International Journal of Environmental Monitoring and Analysis JF - International Journal of Environmental Monitoring and Analysis JO - International Journal of Environmental Monitoring and Analysis SP - 16 EP - 25 PB - Science Publishing Group SN - 2328-7667 UR - https://doi.org/10.11648/j.ijema.20221001.13 AB - Dry lands are traditionally used and managed by a pastoralist, characterized by variable precipitation, climate variability and water scarcity. Change in rainfall trend and variability’s lead to severe production deficit and decline the balance between pasture and livestock on which pastoral livelihood depends on. The study was undertaken to assess the variability and trends of rainfall in Borana pastoral area using monthly rainfall record for the period 1987-2016 of Yabello and Eel-wayye station. Rainfall variability analysis has been done using variability indices like, coefficient of variation, precipitation concentration index and Standard anomaly index. Trend analysis was carried out using Man-Kendall trend test 5% significance level. The coefficient variation of the study area for Yabello was 21.2%, while for Eel-wayye it was 53% which showed high inter-annual variability. The negative anomalies at Yabello station was 53.3% While in Eel-wayye station, revealed 56%. The analysis result indicted that the rainfall concentration index value ranged from 13.2 to 30.23 for the stations which shows moderate to strong irregularly rainfall distribution. The year 2006 was the most drastic and distinct-wide extreme drought episode in both stations, Except short rainy season at Eel-wayye station, the Mann–Kendal test shows not statistically significant (P<0.05). Increasing tendencies of drought during main rainy season and decreasing tendencies of drought during short rainy season and annually were observed in the study area. This threats the livestock production systems, which is the backbone of the pastorals livelihood. The study, suggests policy makers to develop other sustainable water sources for lowlands pastorals. VL - 10 IS - 1 ER -
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