Current and Future Irrigation Water Requirement and Potential in the Abbay River Basin, Ethiopia

IF 3.5 Q2 ENVIRONMENTAL SCIENCES

Air Soil and Water Research Pub Date : 2022-01-01 DOI:10.1177/11786221221097929

A. Yimere, E. Assefa

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引用次数: 7

Abstract

In this study, we evaluated the present and future irrigation potential and irrigation water requirement (IWR) in Ethiopia’s Abbay River Basin using the MIKE HYDRO River modeling software. Relative changes in IWR were determined and analyzed at six irrigation nodes for 19 crops and 23 traits. Four irrigation scenarios were compared: low, medium, full (FULL), and high growth (HIGH). Significant IWR changes were observed in FULL and HIGH irrigation scenarios, with highly intensive irrigation conditions resulting in high IWR. The MIKE HYDRO model was used to simulate the IWR historically for two scenarios: (1) scenario representing the current total irrigable cropland (79,800 ha) and (2) scenario projecting the basin’s potential cropland (658,384 ha). As a result, the area under IWR analysis was 738,184 ha. The annual IWR was 9 billion cubic meters (BCM) and 18 BCM in FULL and HIGH irrigation scenarios, respectively. We found that uncertainties in crop migration, cropping patterns, and adaptation rates to climate change significantly affected irrigation and crop production. It is necessary to investigate the effects of HIGH irrigation on yield and economic benefits of FULL irrigation before adopting different irrigation development methods. Further research is required to adapt to changing climate for development of targeted IWR strategies.

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埃塞俄比亚Abbay河流域当前和未来灌溉用水需求和潜力

在本研究中，我们使用MIKE HYDRO河建模软件评估了埃塞俄比亚阿贝河流域目前和未来的灌溉潜力和灌溉需水量（IWR）。测定并分析了19种作物和23个性状在6个灌溉节点的IWR的相对变化。比较了四种灌溉方案：低、中、满（full）和高生长（high）。在全灌溉和高灌溉情况下观察到显著的IWR变化，高强度灌溉条件导致高IWR。MIKE HYDRO模型用于模拟历史上两种情况下的IWR：（1）表示当前可灌溉农田总量的情况（79800 ha）和（2）预测流域潜在农田的情景（658384 ha）。因此，IWR分析的面积为738184 哈在全灌溉和高灌溉情况下，年IWR分别为90亿立方米和18亿立方米。我们发现，作物迁移、种植模式和气候变化适应率的不确定性严重影响了灌溉和作物生产。在采用不同的灌溉发展方法之前，有必要研究高灌溉对全灌溉产量和经济效益的影响。需要进行进一步的研究，以适应不断变化的气候，制定有针对性的IWR战略。

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来源期刊

Air Soil and Water Research ENVIRONMENTAL SCIENCES-

CiteScore

7.80

自引率

5.30%

发文量

审稿时长

8 weeks

期刊介绍： Air, Soil & Water Research is an open access, peer reviewed international journal covering all areas of research into soil, air and water. The journal looks at each aspect individually, as well as how they interact, with each other and different components of the environment. This includes properties (including physical, chemical, biochemical and biological), analysis, microbiology, chemicals and pollution, consequences for plants and crops, soil hydrology, changes and consequences of change, social issues, and more. The journal welcomes readerships from all fields, but hopes to be particularly profitable to analytical and water chemists and geologists as well as chemical, environmental, petrochemical, water treatment, geophysics and geological engineers. The journal has a multi-disciplinary approach and includes research, results, theory, models, analysis, applications and reviews. Work in lab or field is applicable. Of particular interest are manuscripts relating to environmental concerns. Other possible topics include, but are not limited to: Properties and analysis covering all areas of research into soil, air and water individually as well as how they interact with each other and different components of the environment Soil hydrology and microbiology Changes and consequences of environmental change, chemicals and pollution.