Spatial and temporal trends and variability of rainfall using long-term satellite product over the Upper Blue Nile Basin in Ethiopia

Ayehu, Getachew Tesfaye; Tadesse, Tsegaye; Gessesse, Berhan

doi:10.1007/s41976-021-00060-3

Cited by 10 publications

(1 citation statement)

References 67 publications

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“…In a previous study, the rainfall in Amhara did not show any decreasing or increasing trend from 1978 to 2008 (Ayalew et al, 2012b). In a recent study conducted at Upper Blue Nile Basin (UBNB) or "Abbay Basin," which covers most of Amhara, using the CHIRPS-v2 dataset, the average annual rainfall increased (Ayehu et al, 2021) during 1981-2018. In another similar study conducted at UBNB using 26 stations data having missing days of <30%, Mohammed et al, 2022 reported increasing annual, March-May, and October-February rainfall and decreasing June-September rainfall in >54% and 65.4% of their study area, respectively.…”

Section: Historical Trendmentioning

confidence: 83%

Historical Trend Analysis and Future Projections of Rainfall in Amhara, Ethiopia

Mekoya,

Molla,

Workneh

et al. 2024

East Afr. j. for. agrofor.

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North-western Ethiopia has the greatest potential for lowland bamboo forest resources. The bamboo forest surrounding the region is important for ecological and economic reasons. However, no specific studies have been conducted to determine the variations of biomass and carbon in lowland bamboo forests across different parts of bamboo culms in both plantations and natural forests. Therefore, the main goal of this study was to know the variation of the above-ground biomass and carbon storage of lowland bamboo (Oxytenathera abyssinica) in different vegetative parts of the culm in the Pawe district, in both natural and planted forests. A total of 108 bamboo culms were destructively sampled (54 from plantations and 54 from natural forests). The samples were then separated into three parts: the culm, the branch, and the leaf portion. Each part's total fresh weight and sample fresh weight were immediately determined. The samples were placed in a paper bag and transported to the laboratory for analysis of their dry weight. The data was analyzed using R software for descriptive statistics to examine biomass variations among vegetative parts and age classes of natural and plantation bamboo forests. Managed bamboo forests show a 17% increase in total biomass production compared to natural forests. The medium-aged bamboo group accumulated more above-ground biomass than the younger and older age groups in both forest types, while density increased with age

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Section: Historical Trendmentioning

confidence: 83%

Historical Trend Analysis and Future Projections of Rainfall in Amhara, Ethiopia

Mekoya,

Molla,

Workneh

et al. 2024

East Afr. j. for. agrofor.

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Spatiotemporal variability and trend of rainfall and temperature in Sidama Regional State, Ethiopia

Ware¹,

Matewos²,

Guye³

et al. 2023

Theor Appl Climatol

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This study aims to investigate spatiotemporal variability, trends, and anomaly in rainfall and temperature in the Sidama region, Ethiopia. The TerraClimate gridded dataset on a monthly time scale for 30 years (1991–2020) with a horizontal resolution of approximately 4 km was used for the study. Trends in annual and seasonal rainfall and temperature were assessed using a nonparametric test (Mann-Kendal test) and Sen’s slope to test the statistical significance and magnitude of trends (increase/decrease), respectively. Our findings revealed that annual rainfall, summer (Hawado), and spring (Badhessa) rainfall have shown an increasing trend in most parts of the region, except for its northwest parts. We found a low annual rainfall variability (CV < 13%) over the southeastern and northwestern parts of the region. Rainfall variability revealed the difference in both time and space across the region. Six drought years (1999, 2001, 2002, 2003, 2012, and 2019) with different magnitudes were identified across the region. Annual average maximum (up to 0.4 °C decade−1) and minimum (up to 0.25 °C decade−1) temperatures revealed significantly increasing trends across the region. The standardized anomaly in the mean annual temperature indicated that the years in the recent decade (2011–2020) are getting warmer compared to the past two decades (1991–2010) due to natural and anthropogenic activities causing weather extremes in the region. The results of this study for rainfall contradict the other studies in the rift valley part of the region. Therefore, we suggest appropriate climate change adaptation strategies so that there is high rainfall and temperature variability across the region and between seasons.

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Prediction of agricultural water deficiency and its management using long-term rainfall trends

Gorai

Ratha

Dhir

2023

Sustain. Water Resour. Manag.

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Spatial and temporal trends and variability of rainfall using long-term satellite product over the Upper Blue Nile Basin in Ethiopia

Cited by 10 publications

References 67 publications

Historical Trend Analysis and Future Projections of Rainfall in Amhara, Ethiopia

Historical Trend Analysis and Future Projections of Rainfall in Amhara, Ethiopia

Spatiotemporal variability and trend of rainfall and temperature in Sidama Regional State, Ethiopia

Prediction of agricultural water deficiency and its management using long-term rainfall trends

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