Wet and dry spell analysis for decision making in agricultural water management in the eastern part of Ethiopia, West Haraghe

Sifer, Konjit; Yemenu, Fitsume; Kebede, Asfaw; Quarshi, Shoeb

doi:10.5897/ijwree2016.0650

Cited by 5 publications

(1 citation statement)

References 7 publications

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“…With a similar pattern, the number of dry spells lasting more than 7 days climbed dramatically after the second decade of October (284 DOY) and reached 100% by the end of the month. e current results were consistent with that of [49] who discovered low probabilities of dry spell from June to September in eastern Ethiopia.…”

Section: Characterization Of Climate In Welmera Districtsupporting

confidence: 92%

Characterization of Local Climate and Its Impact on Faba Bean (Vicia faba L.) Yield in Central Ethiopia

Bogale

Maja

Hadgu

2022

Advances in Meteorology

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Climate change is a major threat to agricultural production and undermines the efforts to achieve sustainable development goals in poor countries such as Ethiopia that have climate-sensitive economies. The objective of this study was to assess characterization of local climate and its impact on productivity faba bean (Vicia faba L.) varieties (Gora and Tumsa) productivity in Welmera watershed area, central Ethiopia. Historical climate (1988–2017) and eight years of crop yield data were obtained from National Meteorological Agency of Ethiopia and Holeta Agricultural Research Center. Trend, variability, correlation, and regression analyses were carried out to characterize the climate of the area and establish association between faba bean productivity and climate change. The area received mean annual rainfall of 970 mm with SD of 145.6 and coefficient of variation (CV %) of 15%. The earliest and latest onset of rainfall were April 1 (92 DOY) and July 5 (187 DOY), whereas, the end date of rainy season was on September 2 (246 DOY) and October 31 (305 DOY), respectively. The average length of the growing period was 119 days, with a CV% of 35.2%. The probability of dry spell less than 7 days was high (>80%) until the last decade of May (151 DOY); however, the probability sharply declined and reached 0% on the first decade of July (192 DOY). Kiremt (long rainy season that occurs from June to September) and belg (short rainy season that falls from February to April/May) rainfall had increasing trends at a rate of 4.7 mm and 2.32 mm/year, respectively. The annual maximum temperature showed increasing trend at a rate of 0.06°C per year and by a factor of 0.34°C, which is not statistically significant. The year 2014 was exceptionally drought year while 1988 was wettest year. Kiremt (JJAS) start of rain and rainy day had strong correlation and negative impact on Gora yield with (r = −0.407 and −0.369), respectively. The findings suggests large variation in rainfall and temperature in the study area which constraints faba bean production. Investment on agricultural sector to enhance farmer’s adaptation capacity is essential to reduce the adverse impacts of climate change and variability on faba bean yield. More research that combines household panel data with long-term climate data is necessary to better understand climate and its impact on faba bean yield.

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Section: Characterization Of Climate In Welmera Districtsupporting

confidence: 92%

Characterization of Local Climate and Its Impact on Faba Bean (Vicia faba L.) Yield in Central Ethiopia

Bogale

Maja

Hadgu

2022

Advances in Meteorology

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Spatiotemporal variation of dry spells in the State of Rio de Janeiro: Geospatialization and multivariate analysis

Oliveira

Oliveira‐Júnior

Pereira

et al. 2021

Atmospheric Research

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Analysis of Dry-Spells in the Western Maize-Growing Areas of South Africa

Daniel

Mengistu

Olivier

et al. 2023

Water

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Crop yield in rainfed agriculture is directly influenced by rainfall patterns, which vary from one growing season to another. The failure or success of such crops can depend on the amount and distribution of the rainfall and, particularly, on the occurrence of dry- and wet-spells during the growing season. The aim of this study was to investigate the initial and conditional probabilities of dry-spell pentads using the Markov chain model in the western maize-growing region of South Africa, as well as to determine the direction and magnitude of dry-spell trends using the Mann–Kendal monotonic trend test and Sen’s slope estimator. The results revealed that all the rainfall districts are affected by dry-spells during the mid-January-to-end-of-February period. This finding is significant because maize is usually planted during late November to late December in this region, and dry-spells may coincide with the flowering stage of the maize crop. When dry-spells occur during the flowering stage of maize, they significantly affect yield. The Mann–Kendal analysis revealed that most of the districts (7 out of 11 districts) have a decreasing trend in dry-spell occurrences except for districts 86, 87, 91 and 93. However, the decreasing trend is statistically insignificant in all the rainfall districts, and, thus, this reveals that there is no change or there is a minor change in dry-spell occurrence across all the districts. Furthermore, Sen’s slope estimator signalled a decrease in dry-spell magnitude or occurrence over the study period. Information from this study will inform farmers of the various districts regarding changes in their particular risk profile for dry-spells.

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Wet and dry spell analysis for decision making in agricultural water management in the eastern part of Ethiopia, West Haraghe

Cited by 5 publications

References 7 publications

Characterization of Local Climate and Its Impact on Faba Bean (Vicia faba L.) Yield in Central Ethiopia

Characterization of Local Climate and Its Impact on Faba Bean (Vicia faba L.) Yield in Central Ethiopia

Spatiotemporal variation of dry spells in the State of Rio de Janeiro: Geospatialization and multivariate analysis

Analysis of Dry-Spells in the Western Maize-Growing Areas of South Africa

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