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| dc.contributor.author | ENYEW, BELAYNEH GETNET | |
| dc.date.accessioned | 2024-10-21T07:08:23Z | |
| dc.date.available | 2024-10-21T07:08:23Z | |
| dc.date.issued | 2024-02 | |
| dc.identifier.uri | http://ir.bdu.edu.et/handle/123456789/16040 | |
| dc.description.abstract | Irrigated agriculture offers several benefits, including the improvement of lifestyles and the achievement of food security. Climate change, which refers to long-term alterations in various aspects of the Earth's climate elements, affects agricultural practice including irrigated agricul-ture. This study focuses on assessing the potential impact of climate change on irrigation water demand in the North Gojjam sub-basin. Two climate change scenarios Shared Socioeconomic Pathway 2 (SSP2-4.5) and Shared Socioeconomic Pathway 5 (SSP5-8.5) from the CMIP6 project were utilized, along with two climate models (BCC-CSM-2MR for precipitation and MRI-ESM2-0 for temperature) were selected based on performance. The data underwent bias correction before being used as input to the CropWat 8.0 software. The analysis revealed that compared to the base-line, the projected future temperature in the sub-basin is expected to increase, while rainfall is anticipated to decrease. The mean precipitation projections indicate different trends for the two scenarios. The changes relative to the baseline show a near-term increase of 0.7% (SSP2-4.5) and a decrease of 2.6% (SSP5-8.5). In the mid-term, mean precipitation changes by -0.7% (SSP2-4.5) and -4.0% (SSP5-8.5), while over the entire century, the changes are -2.1% (SSP2-4.5) and -5.4% (SSP5-8.5). Regarding to maximum temperature, under SSP2-4.5, the near-term and mid-term show temperature increases of 2.2°C and 2.5°C, respectively. In the longer term, the maximum temperature rises by 2.9°C compared to the baseline. Similarly, under SSP5-8.5, the near-term, mid-term, and long-term changes are 3.4°C, 4.0°C, and 4.6°C, respectively. To estimate the water demand for irrigation, the CropWat 8.0 software was employed for the selected crops under both climate change scenarios. The findings indicate an increase in irrigation water requirements be-tween 2026 and 2085 under both SSP2-4.5 and SSP5-8.5 scenarios. Approximately 20 mm and 30 mm more irrigation water would be needed compared to the baseline period for the respective scenarios. These results are significant for the development of sustainable water resource strate-gies. Hence, mitigation of climate change impacts, particularly enhanced climate change resilient irrigation management will be fundamental for the region. The outcomes of this study can be val-uable for decision-makers, farmers, irrigation engineers, and other stakeholders involved in irri-gation design, monitoring, scheduling, and related activities. By incorporating these findings into planning and implementation processes, the study aims to contribute to the effective management of water resources in the face of climate change challenges. Keywords: Climate change, Trend analysis, CROPWAT, ETo, Shared socio-economic pathways. | en_US |
| dc.language.iso | en_US | en_US |
| dc.subject | Civil and Water Resource Engineering | en_US |
| dc.title | EVALUATING IMPACTS OF CLIMATE CHANGE ON IRRIGATED AGRICULTURE, A CASE OF NORTH GOJJAM SUB-BASIN, BLUE NILE BASIN OF ETHIOPIA | en_US |
| dc.type | Thesis | en_US |
