气候变化领域集成服务门户(CCPortal): Numerical groundwater flow modeling under future climate change in the Central Rift Valley Lakes Basin; Ethiopia

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DOI	10.1016/j.ejrh.2024.101733
	Numerical groundwater flow modeling under future climate change in the Central Rift Valley Lakes Basin; Ethiopia
	Balcha, Sisay Kebede; Hulluka, Taye Alemayehu; Awass, Adane Abebe; Bantider, Amare; Ayele, Gebiaw T.; Walsh, Claire L.
发表日期	2024
EISSN	2214-5818
起始页码	52
卷号	52
英文摘要	Study area: Katar and Meki subbasins, Rift Valley Lakes Basin, Ethiopia.Study focus: This research was carried out to characterized the recharge mechanism and quantify the steady-state groundwater balance and its sensitivity to future climate change. A groundwater simulation model was constructed and calibrated using a hydro-geo spatial dataset. Three regional climate models were used to assess the potential impact of changes in future precipitation on the recharge rate and groundwater balance components.New Hydrogeological Insight: Groundwater potential assessment depends on accurate estimation of the recharge rate. Precipitation contributed 11.95% and 11.96% to groundwater recharge in the Katar and Meki subbasins, respectively. The steady-state numerical groundwater model was calibrated and the model performed in the ranges of R2: 0.95-0.99; RMSE: 16.17-25.18; and MAE: 12.69-24.55, demonstrating 'excellent' model performance. In particular, the model exhibited high sensitivity to changes in the recharge rate and horizontal hydraulic conductivity. Future change in precipitation caused a reduction in groundwater potential in the range of 6.24-40.32% by the 2040 s and 2070 s, respectively, in the Katar subbasin. Likewise, the Meki Subbasin will experience a reduction in groundwater potential in the range of 0.29-37.17% by the 2040 s and 2070 s, respectively. These results emphasize how crucial it is for future water resource development initiatives to take into account climate variability for sustainable groundwater development.
英文关键词	MODFLOW-NWT; Numerical Modeling; Climate change impact; Groundwater recharge; Hydrological Modeling; Central Rift Lakes; Basin; Ethiopia
语种	英语
WOS研究方向	Water Resources
WOS类目	Water Resources
WOS记录号	WOS:001226822700001
来源期刊	JOURNAL OF HYDROLOGY-REGIONAL STUDIES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/309870
作者单位	Addis Ababa University; Addis Ababa University; Arba Minch University; Addis Ababa University; Griffith University; Griffith University; Newcastle University - UK
推荐引用方式 GB/T 7714	Balcha, Sisay Kebede,Hulluka, Taye Alemayehu,Awass, Adane Abebe,et al. Numerical groundwater flow modeling under future climate change in the Central Rift Valley Lakes Basin; Ethiopia[J],2024,52.
APA	Balcha, Sisay Kebede,Hulluka, Taye Alemayehu,Awass, Adane Abebe,Bantider, Amare,Ayele, Gebiaw T.,&Walsh, Claire L..(2024).Numerical groundwater flow modeling under future climate change in the Central Rift Valley Lakes Basin; Ethiopia.JOURNAL OF HYDROLOGY-REGIONAL STUDIES,52.
MLA	Balcha, Sisay Kebede,et al."Numerical groundwater flow modeling under future climate change in the Central Rift Valley Lakes Basin; Ethiopia".JOURNAL OF HYDROLOGY-REGIONAL STUDIES 52(2024).