Temesgen Fekadu, Terefe Baye
Department of Remote Sensing, SSGI, Addis Ababa University, Addis Ababa ,Ethiopia.
Department of Geography and Environmental Studies, Injibara University, Injibara , Ethiopia.
Heliyon. 2024 Aug 2;10(15):e35604. doi: 10.1016/j.heliyon.2024.e35604. eCollection 2024 Aug 15.
Irrigation dams and irrigation suitability analysis is important for optimal water management, crop selection and productivity, water conservation, environmental sustainability, and economic viability in agriculture arena. Thus, the main objectives of this study were to identify a suitable dam site and irrigation area in the Gedeb River, Ethiopia, using Multi-Criteria Decision-Making analysis and 3D Visualization techniques. To identify a suitable dam site, various parametrs such as rainfall, runoff, stream flow, mineral site, faulting areas, landslide site, rock types, elevation points, relief features, soil types were used while to identify a suitable irrigation area, different parametrs such as altitude, slope, soil, geological structure, distance, and land use land cover datasets were used. The necessary dataset which were used to identify a suitable dam site and irrigation area collected from Ethiopian Mapping Authority (EMA), Ethiopian irrigation and energy ministry freely. In addition, for the final irrigation dam site selection and suitable irrigation area in the Gedeb watershed, multi-criteria decision-making method with expert judgment were applied respectively. Based on the study's findings, a suitable irrigation water reservoir dam covering an area of 1886 ha, with a potential water holding capacity of 2,961,145,697 cubic meters was identified. The results also revealed a highly suitable area of 18,362.05 ha, a moderately suitable area of 19,204.05 ha, a marginally suitable area of 2095.25 ha, and a not suitable area of 2.89 ha for the aforementioned purpose. The methodological approach and research findings presented in this study can greatly assist government and non-governmental organization planners and decision-makers in the development of irrigation projects.
灌溉水坝与灌溉适宜性分析对于农业领域的优化水资源管理、作物选择与生产力、水资源保护、环境可持续性以及经济可行性而言至关重要。因此，本研究的主要目标是运用多准则决策分析和3D可视化技术，在埃塞俄比亚的格德布河确定合适的坝址和灌溉区域。为确定合适的坝址，使用了诸如降雨、径流、溪流流量、矿点、断层区域、滑坡地点、岩石类型、高程点、地形特征、土壤类型等各种参数；而在确定合适的灌溉区域时，则使用了诸如海拔、坡度、土壤、地质结构、距离以及土地利用土地覆盖数据集等不同参数。用于确定合适坝址和灌溉区域的必要数据集免费从埃塞俄比亚测绘局（EMA）、埃塞俄比亚灌溉与能源部获取。此外，针对格德布流域最终灌溉坝址的选择和合适的灌溉区域，分别应用了带有专家判断的多准则决策方法。基于该研究的结果，确定了一个面积为1886公顷、潜在蓄水量为2961145697立方米的合适灌溉水库大坝。结果还显示，上述目的的高度适宜面积为18362.05公顷，中度适宜面积为19204.05公顷，勉强适宜面积为2095.25公顷，不适宜面积为2.89公顷。本研究中提出的方法途径和研究结果能够极大地协助政府和非政府组织的规划者及决策者开展灌溉项目。
