International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 01 | Jan 2024
p-ISSN: 2395-0072
www.irjet.net
Long Term Trend Analysis of Precipitation and Temperature for Asosa district, Benishangul Gumuz regional state, Ethiopia) Tsehaye Adamua, Zhu Haochena*, Mehari Mariyea aTongji University, College of Environmental Science & Engineering, Shanghai, 200092, China, a*Tongji University, Shanghai 200092, China.
---------------------------------------------------------------------------***--------------------------------------------------------------------------Abstract Background: To find and measure the influence of climate change on socio-economic sectors and ecosystems, many worldwide studies have been carried out and policy modifications for mitigation and adaptation were recommended. Though, the time worn made top-down approach, universal study, has little local and regional specificity and has unsuccessful to address the regional and local consequences of climate change. Therefore, this research was conducted in satisfying such awareness gaps in Asosa District, Benishangul Gumuz Regional State. Methods: The research was designed at addressing the national and local issues of climate change and was done by investigating time series temperature and precipitation trends in Benishangul Gumuz Regional state of Ethiopia, Asosa District in particular. To achieve this objective, both primary and secondary data from different sources were used. The collected data were investigated following quantitative and qualitative analysis methods and Manna Kendall trend test method was used. Results: The main results revealed that the mean, maximum and minimum temperature had a general decreasing annual maximum, minimum and mean annual temperature change from 1993 to 2022. The trend line shows that the average yearly maximum temperature decreased approximately by a factor of -0.0341 and the minimum temperature was decreased by 0.0152 factor respectively. To the average, the annual maximum temperature is found to be 31.40C (2005 year) and the annual minimum temperature is 14.07 (2011), For the temperature data recorded in the study area, the average values were analyzed usingthe Mann - Kendall test and the results revealed that annual, winter, spring, and autumn season minimum and maximum temperature indicated a decreasing trend but summer season for minimum temperature showed an increasing trend. The Annual minimum temperature result implies that statistically not significant decreasing trend at (P = 0.05) but the annual maximum temperature reveals statistically significant decreasing trend for the annual maximum temperature. Whereas, the annual precipitation amount showed statistically significant increasing trend in Asosa district. Conclusions: To conclude, the concerned body, development planners should design strategies and plans by taking into account a rising summer precipitation and declining temperature impacts on rural livelihoods.
Keywords: Temperature trend, Climate change and variability, Manna Kendall trend test, Precipitation trend, Time series trend analysis.
1. Introduction Climate change is one of the multiple challenges facing all categories of farmers globally. However, African farmers are the most sensitive in respect of climate variability and change. Climate change impacted negatively on crop production and the livelihoods of the local farmers[1, 2]. Climate change poses a major threat to the semi-arid tropics, which is characterized by scanty and uncertain rainfall, infertile soils, poor infrastructure, extreme poverty and rapid population growth. These conditions present serious environmental, economic and social impacts on the agricultural community[3]. Nowadays climate change is amongst the most critical problems affecting the wellbeing of human beings. In Ethiopia, where the majority of the population rely on agriculture, climate change has adverse effects. In rural areas, low resilient capacity to shocks exacerbates the impacts of climate change such as production failure, which in turn enormously contributed to food insecurity [4]. Small-holder farmers in Ethiopia are facing several climate related hazards, in particular highly variable rainfall with severe droughts which can have devastating effects on their livelihoods [5]. Droughts and floods are very common phenomena in
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