Spatio-temporal analysis of drought variability in central Ethiopia

Drought is a major problem in Ethiopia and particularly affects the agricultural and water sectors. This paper aims to assess the spatial and temporal drought variability of central Ethiopia. For this purpose, archival rainfall data recorded from 1989 to 2017 and the Gurage zone topographic maps wer...

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Autor principal:	Solomon Abirdew Yirga
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	drought gis spatial spi temporal variability Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/1818270de6f74b24a382a0bc3d839ad9
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spelling	oai:doaj.org-article:1818270de6f74b24a382a0bc3d839ad92021-11-05T19:01:56ZSpatio-temporal analysis of drought variability in central Ethiopia2040-22442408-935410.2166/wcc.2020.226https://doaj.org/article/1818270de6f74b24a382a0bc3d839ad92021-08-01T00:00:00Zhttp://jwcc.iwaponline.com/content/12/5/1778https://doaj.org/toc/2040-2244https://doaj.org/toc/2408-9354Drought is a major problem in Ethiopia and particularly affects the agricultural and water sectors. This paper aims to assess the spatial and temporal drought variability of central Ethiopia. For this purpose, archival rainfall data recorded from 1989 to 2017 and the Gurage zone topographic maps were used. The five stations’ Standardized Precipitation Index (SPI) were combined with the geographical information system (GIS) to analyze the spatial distribution of drought events. The results show that a total number of 41 drought events were recorded in the region. The number of drought events reaches its maximum value in the year 1992, whereas Bui and Koshe contain the most frequent drought events. The spatial analysis of droughts verifies that most of the frequent and extreme events are recorded in the eastern part of the region. The lowland part of Gurage zone is very prone to drought. The grounded spatio-temporal drought risk events analysis has shown a possible threat to the water and rain-fed farming that has a cascading effect on the livelihoods of farmers. Moreover, the drought condition of the region is unpredictable and recurrent. This study recommends further study containing remaining statistical drought indices such as reconnaissance drought and streamflow drought index. HIGHLIGHTS Some parts of the zone were found to be very sensitive and vulnerable to drought events.; Drought conditions in the area were found to be unpredictable and recurrent.; Areas vulnerable to drought were identified, which helps to point out adaptation options and spot early warning signs, establishing a climate research center and refugee camp.; The level of drought risk in the area was identified against the global risk measurement scale.;Solomon Abirdew YirgaIWA PublishingarticledroughtgisspatialspitemporalvariabilityEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENJournal of Water and Climate Change, Vol 12, Iss 5, Pp 1778-1787 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	drought gis spatial spi temporal variability Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	drought gis spatial spi temporal variability Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Solomon Abirdew Yirga Spatio-temporal analysis of drought variability in central Ethiopia
description	Drought is a major problem in Ethiopia and particularly affects the agricultural and water sectors. This paper aims to assess the spatial and temporal drought variability of central Ethiopia. For this purpose, archival rainfall data recorded from 1989 to 2017 and the Gurage zone topographic maps were used. The five stations’ Standardized Precipitation Index (SPI) were combined with the geographical information system (GIS) to analyze the spatial distribution of drought events. The results show that a total number of 41 drought events were recorded in the region. The number of drought events reaches its maximum value in the year 1992, whereas Bui and Koshe contain the most frequent drought events. The spatial analysis of droughts verifies that most of the frequent and extreme events are recorded in the eastern part of the region. The lowland part of Gurage zone is very prone to drought. The grounded spatio-temporal drought risk events analysis has shown a possible threat to the water and rain-fed farming that has a cascading effect on the livelihoods of farmers. Moreover, the drought condition of the region is unpredictable and recurrent. This study recommends further study containing remaining statistical drought indices such as reconnaissance drought and streamflow drought index. HIGHLIGHTS Some parts of the zone were found to be very sensitive and vulnerable to drought events.; Drought conditions in the area were found to be unpredictable and recurrent.; Areas vulnerable to drought were identified, which helps to point out adaptation options and spot early warning signs, establishing a climate research center and refugee camp.; The level of drought risk in the area was identified against the global risk measurement scale.;
format	article
author	Solomon Abirdew Yirga
author_facet	Solomon Abirdew Yirga
author_sort	Solomon Abirdew Yirga
title	Spatio-temporal analysis of drought variability in central Ethiopia
title_short	Spatio-temporal analysis of drought variability in central Ethiopia
title_full	Spatio-temporal analysis of drought variability in central Ethiopia
title_fullStr	Spatio-temporal analysis of drought variability in central Ethiopia
title_full_unstemmed	Spatio-temporal analysis of drought variability in central Ethiopia
title_sort	spatio-temporal analysis of drought variability in central ethiopia
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/1818270de6f74b24a382a0bc3d839ad9
work_keys_str_mv	AT solomonabirdewyirga spatiotemporalanalysisofdroughtvariabilityincentralethiopia
_version_	1718444022994829312

Spatio-temporal analysis of drought variability in central Ethiopia

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