Water Requirement for Maize Crop Under Climate Change in Mirab Abaya Woreda, Southern Ethiopia
Issue:
Volume 6, Issue 3, May 2021
Pages:
50-56
Received:
16 March 2021
Accepted:
21 May 2021
Published:
31 May 2021
Abstract: Climate change is a topic of discussion worldwide including in Ethiopia. Ethiopia is one of the country’s most vulnerable to the impacts of climate variability and change on agriculture. This study investigates were to examine crop water requirements under climate changes scenarios for maize crop at Mirab-abaya woreda which is situated in 6.18◦ N latitude and 37.77◦E longitude. Dynamically downscaled climate model outputs were obtained from the CORDEX-Africa program for (RCP) Representative Concentration Pathway of both scenarios which were used for future climatic conditions of the future periods; (2021 – 2050). The projected data was quality checked, biased corrected and model performance was evaluated. Mann Kendall's trend detection and Sen.’s slope estimator were used by XLSTAT software to evaluate the trends of projection and to detect changes. Hargreaves method was used to estimate current and future crop evapotranspiration of Maize. The result for observed and future revealed that the maximum and minimum temperatures increase in all time horizons. However, Projections of future rainfall suggest that annual rainfall decreases in both scenarios, the current and future potential evapotranspiration show that increasing trend in both cases except the observed Mirab-abaya station.
Abstract: Climate change is a topic of discussion worldwide including in Ethiopia. Ethiopia is one of the country’s most vulnerable to the impacts of climate variability and change on agriculture. This study investigates were to examine crop water requirements under climate changes scenarios for maize crop at Mirab-abaya woreda which is situated in 6.18◦ N l...
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Analysis of Spatial and Temporal Climate Characteristics in North Eastern Ethiopia: Case Study of North Wollo Zone
Wagaye Bahiru,
Eshetu Zewdu
Issue:
Volume 6, Issue 3, May 2021
Pages:
57-67
Received:
20 July 2021
Accepted:
30 July 2021
Published:
5 August 2021
Abstract: In Ethiopia, agriculture is the most important sector; the corner stone of the economy; which is a source of livelihood for more than 85% of Ethiopians; and contributes nearly 50% of the Growth Domestic Product (GDP) of the country. However, the production performance of the sector is largely depending on the good will of seasonal climate characteristics due to its long-lasting marriage of rain-fed based farming system. Therefore, this study was aimed to investigate the climate characteristics of a region, in north eastern Ethiopia, using seventeen meteorological stations having 31 years of observed rainfall and temperature time series data. Rainfall variability of annual and seasonal climate characteristics were subjected for rainfall anomaly index and coefficient of variation statistics and Mann-Kendall trend test approach were applied to investigate trends of rainfall and temperature in the region over the last 31-years. The result shows that rainfall and temperature were varied across location and time. In this region, mean annual rainfall ranges from 531 mm; over some pocket areas of western, central and north eastern parts; to 1005mm in south eastern region of north Wollo. In terms of rainfall distribution, the area receives rainfall two times a year; from June to September (kiremt) and from Mid-February to Mid-May (Belg) period. In this regard, rainfall during belg is highly erratic and unstable relative to the main growing season. The location wide analysis concluded that variation in season onset; cessation and growing season length were observed across from location to location. According to the study, 4-July (DOY=166) and 4-Octoner (DOY=278), in respective order, were estimated as mean dates that the season starts and ends. Further, the analysis revealed, in general, the season onset ranges from 15-June (at Lalibela) to 16-July (at Tekulishi); and end of growing season varies from 21-September (Zobil) to 15-October (Sirinka). In general, investigating annual and seasonal climate characteristics; particularly the characteristics of onset, cessation and length of growing season: helps to undertake manageable farming practices that would be suited with local climate potentials. Indeed, climate information has a huge impact on management of seasonal farming activities that would be undertaken during preseason, in season, and post season farming activities.
Abstract: In Ethiopia, agriculture is the most important sector; the corner stone of the economy; which is a source of livelihood for more than 85% of Ethiopians; and contributes nearly 50% of the Growth Domestic Product (GDP) of the country. However, the production performance of the sector is largely depending on the good will of seasonal climate character...
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