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Impact of land use and land cover dynamics on ecologically-relevant flows and blue-green water resources
Ecohydrology & Hydrobiology ( IF 2.6 ) Pub Date : 2022-03-19 , DOI: 10.1016/j.ecohyd.2022.03.002
Tekalegn Ayele Woldesenbet 1
Affiliation  

Understanding how changes in land use and land cover classes influence the portioning of rainfall into blue and green water resources as well as land use dynamics on ecologically pertinent flows are vital for sustainable water resource management and ecology. Guder catchment, one of the tributaries of the Upper Blue Nile Basin in Ethiopia, was considered for the conduction of ecohydrological modeling using land use land cover maps and the Soil and Water Assessment Tool (SWAT). Cultivation land is expanded while forest and plantation are declined, consequently blue water component increased while the green water component declined in the study catchment. Besides, the decline in low flow specially during months of dry period and increase in high flow during rainy season could have negative consequences for ecology. Therefore, sustainable land and water management at catchment level is essential to protect an ecosystem and for sustainable water resources management. The vital resilience capacity of the ecosystem to accommodate alteration without loss of consistency should be maintained. Change in green water due to land use land cover affects biological functions in terrestrial ecosystem as green water is closely linked with biological functions and rainfed agriculture. The approach applied in the present study to investigate the land use and land cover change impact on blue and green water flows as well as on ecological pertinent streamflows can be simply implemented in other river basin systems.



中文翻译:

土地利用和土地覆盖动态对生态相关流量和蓝绿色水资源的影响

了解土地利用和土地覆盖类别的变化如何影响降雨量为蓝色和绿色水资源的分配以及生态相关流量的土地利用动态对于可持续水资源管理和生态学至关重要。Guder 集水区是埃塞俄比亚上青尼罗河盆地的支流之一,被考虑使用土地利用土地覆盖图和土壤和水评估工具 (SWAT) 进行生态水文建模。耕地扩大,森林和人工林减少,因此研究流域蓝水成分增加而绿水成分减少。此外,特别是旱季低流量的下降和雨季高流量的增加可能对生态产生负面影响。所以,集水区的可持续土地和水资源管理对于保护生态系统和可持续水资源管理至关重要。应保持生态系统在不丧失一致性的情况下适应变化的重要恢复能力。由于绿水与生物功能和雨养农业密切相关,因此土地利用土地覆盖引起的绿水变化会影响陆地生态系统的生物功能。本研究中用于调查土地利用和土地覆盖变化对蓝色和绿色水流以及与生态相关的水流的影响的方法可以在其他流域系统中简单实施。应保持生态系统在不丧失一致性的情况下适应变化的重要恢复能力。由于绿水与生物功能和雨养农业密切相关,因此土地利用土地覆盖引起的绿水变化会影响陆地生态系统的生物功能。本研究中用于调查土地利用和土地覆盖变化对蓝色和绿色水流以及与生态相关的水流的影响的方法可以在其他流域系统中简单实施。应保持生态系统在不丧失一致性的情况下适应变化的重要恢复能力。由于绿水与生物功能和雨养农业密切相关,因此土地利用土地覆盖引起的绿水变化会影响陆地生态系统的生物功能。本研究中用于调查土地利用和土地覆盖变化对蓝色和绿色水流以及与生态相关的水流的影响的方法可以在其他流域系统中简单实施。

更新日期:2022-03-19
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