埃塞俄比亚Omo-Gibe盆地Ajora-Woybo流域水文成分和产沙量对土地利用和土地覆盖变化的响应

IF 3.5 Q2 ENVIRONMENTAL SCIENCES
M. B. Toma, Mulugeta Dadi Belete, M. Ulsido
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引用次数: 4

摘要

了解流域如何响应生态变化以及LULC变化如何影响流域水文,对于水土资源管理至关重要。埃塞俄比亚Ajora-Woybo流域的土地利用价值变化对水土资源产生了重大影响。研究人员的目标是了解LULC变化在历史上和未来如何影响流域的水文成分(hc)和沉积物产量(SED)。利用SWAT2012和偏最小二乘回归(PLSR)模型,研究了土壤和水分评估工具对实现这一目标的贡献。研究结果表明,2000 - 2020年期间,耕地、建设用地和裸地持续增长,灌木地和林地减少,预计2035年和2050年期间这一趋势将继续。在历史时期发生的LULC变化增加了年地表径流量(23.5%)、产水量(5.7%)和产沙量(23.5%)。另一方面,观测到的改造减少了侧向流量(12.8%)和地下水流量(10.9%)。除2020年LULC期外,蒸散量在研究年份均呈下降趋势。预测未来LULC状态的影响与历史趋势一致。PLSR结果表明,耕地和建成区与地表径流和产沙量呈正相关,灌丛地和林地与地表径流和产沙量呈负相关。这凸显了尽快控制LULC变化对维持流域长期稳定的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hydrological Components and Sediment Yield Response to Land Use Land Cover Change in The Ajora-Woybo Watershed of Omo-Gibe Basin, Ethiopia
Understanding how watersheds respond to ecological changes and how LULC alteration affects watershed hydrology is crucial for water and soil resource management. LULC changes in the Ajora-Woybo watershed, Ethiopia, have momentously affected the water and soil resources. The researchers aimed to see how LULC changes affect hydrological components (HCs) and sediment yield (SED) in the watershed, both historically and in the future. The Soil and Water Assessment Tool (SWAT2012) and Partial Least Squares Regression (PLSR) models were used to investigate the contribution of each of the LULC classes to achieve the goal. The findings revealed a continual growth of cultivated land, built-up areas, and bare land, and a retreat of shrub land and forest land during the 2000 to 2020 periods, which is expected to continue in the 2035 and 2050 periods. Changes in LULC that happened over the historical era increased yearly surface runoff (23.5%), water yield (5.7%), and sediment yield (23.5%). On the other hand, the observed modifications have reduced lateral flow (12.8%) and groundwater flow (10.9%). Except for the 2020 LULC period, evapotranspiration decreased during the studied years. The future impacts of LULC states are predicted to increase in line with the historical trend. The PLSR results showed that cultivated land and built-up areas had a positive association with surface runoff and sediment yield, but shrub land and forest land had a negative correlation. This highlights the importance of controlling the LULC change as soon as possible to maintain long-term watershed stability.
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来源期刊
Air Soil and Water Research
Air Soil and Water Research ENVIRONMENTAL SCIENCES-
CiteScore
7.80
自引率
5.30%
发文量
27
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.
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