Analysis of rainfall and temperature variability for agricultural water management in the upper Genale river basin, Ethiopia

• DOI: 10.1016/j.sciaf.2023.e01635
• Publication Date: 2023-03-11T16:30:14Z
• Authors: Mehari Shigute; Tena Alamirew; Adane Abebe; Christopher E. Nd...; Habtamu Tilahun K...
• Keywords: Growing season; Trend analysis

A better understanding of climate-induced changes and support for adaptation strategies requires knowledged the spatiotemporal dynamics climatic variables. This study aims to assess long-term in annual seasonal rainfall temperature agricultural water management upper Genale river basin, Ethiopia. To achieve this objective, climate data from 13 stations between 1975 2018, as well maximum minimum temperatures six were collected Ethiopian National Meteorological Service Agency (NMA). The characteristics (onset, cessation, length growing season, crop requirement) assessed using Coefficient Variation (CV), Standard Rainfall Anomaly (SRA), Precipitation Concentration Index (PCI). Additionally, Mann–Kendall test Sen's slope estimator used trend magnitude temperature. annual, winter, spring, summer autumn CVs 20%, 89%, 30%, 45%, 32%, respectively. standardized anomalies indicated that basin had a drier season than wet season. mean Belg Kiremt ranged 43 79 days 38 170 days, On an summer, basis, most showed non-significant trend. In contrast, spring decreasing but statistically insignificant all except Bensadaye, Bore, Telamokentise, Yirba Muda stations. According analysis requirements studied supplemental irrigation is essential reducing yield reduction failure during autumn. these seasons, maize sorghum varieties required supplementary up 202 mm 252 mm, Annual increasing at Hagre Selam station. Generally, there was spatially temporally variable while irrespective temporal spatial factors. Thus, contributes change findings can be planning measures against changing climate.