Temporal and spatial characteristics of drought, future changes and possible drivers over Upper Awash Basin, Ethiopia, using SPI and SPEI

Haftu Brhane Gebremichael (), Gelana Amente Raba (), Kassahun Ture Beketie () and Gudina Legese Feyisa ()
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Haftu Brhane Gebremichael: Haramaya University
Gelana Amente Raba: Haramaya University
Kassahun Ture Beketie: College of Natural and Computational Sciences Addis Ababa University
Gudina Legese Feyisa: College of Natural and Computational Sciences Addis Ababa University

Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, 2024, vol. 26, issue 1, No 39, 947-985

Abstract: Abstract Drought is a global problem that affects particularly agricultural and water resources. The spatiotemporal drought characteristics and their possible drivers over Upper Awash Basin (UAB) were assessed in magnitude, duration, frequency, and intensity. Gridded data and a statistical downscaling model (SDSM) were used for historical projection. The Standardized Precipitation Index (SPI) and Standardized Evapotranspiration Index (SPEI) at 4- and 12-month timescales were used to compute the drought. The SPI 4-and 12-months indicate 1984, 1987, 2002, 2015, and 2016 years of dominant drought. Persistent dry events were observed in the west, northwestern, and some eastern parts of the study area in Representative Concentration Pathways (RCP) 4.5 and 8.5 scenarios. Trend analysis of seasonal shows that a statistically significant (P

Keywords: Drought; Possible drivers; SPEI; SPI; Statistical downscaling model; Upper Awash Basin (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s10668-022-02743-3

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