Temporal rainfall trend analysis in different agro-ecological regions of southern Africa

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dc.creatorMupangwa, W.
dc.creatorMakanza, R.
dc.creatorChipindu, L.
dc.creatorMoeletsi, M.
dc.creatorMkuhlani, S.
dc.creatorLiben, F.
dc.creatorNyagumbo, I.
dc.creatorMutenje, M.
dc.date2021-10
dc.date2022-02-01T10:02:12Z
dc.date2022-02-01T10:02:12Z
dc.date.accessioned2026-06-27T16:04:07Z
dc.descriptionRainfall is a major driver of food production in rainfed smallholder farming systems. This study was conducted to assess linear trends in (i) different daily rainfall amounts (<5, 5–10, 11–20, 21–40 and >40 mm∙day-1), and (ii) monthly and seasonal rainfall amounts. Drought was determined using the rainfall variability index. Daily rainfall data were derived from 18 meteorological stations in southern Africa. Daily rainfall was dominated by <5 mm∙day-1 followed by 5–10 mm∙day -1. Three locations experienced increasing linear trends of <5 mm∙day-1 amounts and two others in sub-humid region had increases in the >40 mm day -1 category. Semi-arid location experienced increasing trends in <5 and 5–10 mm∙day-1 events. A significant linear trend in seasonal rainfall occurred at two locations with decreasing rainfall (1.24 and 3 mm∙season-1). A 3 mm∙season-1 decrease in seasonal rainfall was experienced under semi-arid conditions. There were no apparent linear trends in monthly and seasonal rainfall at 15 of the 18 locations studied. Drought frequencies varied with location and were 50% or higher during the November–March growing season. Rainfall trends were location and agro-ecology specific, but most of the locations studied did not experience significant changes between the 1900s and 2000s.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/117870
dc.identifier.urihttp://hdl.handle.net/123456789/121584
dc.languageen
dc.publisherAcademy of Science of South Africa
dc.rightsOpen Access
dc.sourceMupangwa, W., Makanza, R., Chipindu, L., Moeletsi, M., Mkuhlani, S., Liben, F., ... & Mutenje, M. (2021). Temporal rainfall trend analysis in different agro-ecological regions of southern Africa. Water SA, 47(4), 466-479.
dc.subjectagriculture
dc.subjectrisk
dc.subjectdrought
dc.subjectrainfed
dc.subjectdistribution
dc.subjectfarming systems
dc.subjectclimate smart agriculture
dc.subjectrainfall
dc.titleTemporal rainfall trend analysis in different agro-ecological regions of southern Africa
dc.typeJournal Article

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Instituto Internacional de Agricultura Tropical (IITA)