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DOI	10.1002/hyp.13715
	Change in low flows due to catchment management dynamics-Application of a comparative modelling approach
	Gebremicael, Tesfay G.1,2,3; Mohamed, Yasir A.1,2,4; van der Zaag, Pieter 1,2; Hassaballah, Khalid 1,4; Hagos, Eyasu Y.5
通讯作者	Gebremicael, Tesfay G.
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2020
卷号	34 期号:9 页码:2101-2116
英文摘要	Understanding the natural low flow of a catchment is critical for effective water management policy in semi-arid and arid lands. The Geba catchment in Ethiopia, forming the headwaters of Tekeze-Atbara basin was known for its severe land degradation before the recent large scale Soil and Water conservation (SWC) programs. Such interventions can modify the hydrological processes by changing the partitioning of the incoming rainfall on the land surface. However, the literature lacks studies to quantify the hydrological impacts of these interventions in the semi-arid catchments of the Nile basin. Statistical test and Indicators of Hydrological Alteration (IHA) were used to identify the trends of streamflow in two comparatives adjacent (one treated with intensive SWC intervention and control with fewer interventions) catchments. A distributed hydrological model was developed to understand the differences in hydrological processes of the two catchments. The statistical and IHA tools showed that the low flow in the treated catchment has significantly increased while considerably decreased in the control catchment. Comparative analysis confirmed that the low flow in the catchment with intensive SWC works was greater than that of the control by >30% while the direct runoff was lower by >120%. This implies a large proportion of the rainfall in the treated catchment is infiltrated and recharge aquifers which subsequently contribute to streamflow during the dry season. The proportion of soil storage was more than double compared to the control catchment. Moreover, hydrological response comparison from pre- and post-intervention showed that a drastic reduction in direct runoff (>84%) has improved the low flow by >55%. This strongly suggests that the ongoing intensive SWC works have significantly improved the low flows while it contributed to the reduction of total streamflow in the catchment.
英文关键词	catchment management Geba catchment hydrological processes low flow soil and water conservation Tekeze-Atbara River basin
类型	Article
语种	英语
国家	Netherlands ; Ethiopia ; Sudan
开放获取类型	Green Published, hybrid
收录类别	SCI-E
WOS记录号	WOS:000515087900001
WOS关键词	TEKEZE-ATBARA BASIN ; LAND-USE ; WATER CONSERVATION ; CLIMATE VARIABILITY ; LOESS PLATEAU ; HYDROLOGICAL IMPACT ; SOIL CONSERVATION ; PAIRED CATCHMENT ; EASTERN TIGRAY ; RIVER-BASIN
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314687
作者单位	1.IHE Delft Inst Water Educ, Delft, Netherlands; 2.Delft Univ Technol, Delft, Netherlands; 3.Tigray Agr Res Inst, Mekelle, Ethiopia; 4.Hydraul Res Stn, Wad Madani, Sudan; 5.Mekelle Univ, Mekelle, Ethiopia
推荐引用方式 GB/T 7714	Gebremicael, Tesfay G.,Mohamed, Yasir A.,van der Zaag, Pieter,et al. Change in low flows due to catchment management dynamics-Application of a comparative modelling approach[J],2020,34(9):2101-2116.
APA	Gebremicael, Tesfay G.,Mohamed, Yasir A.,van der Zaag, Pieter,Hassaballah, Khalid,&Hagos, Eyasu Y..(2020).Change in low flows due to catchment management dynamics-Application of a comparative modelling approach.HYDROLOGICAL PROCESSES,34(9),2101-2116.
MLA	Gebremicael, Tesfay G.,et al."Change in low flows due to catchment management dynamics-Application of a comparative modelling approach".HYDROLOGICAL PROCESSES 34.9(2020):2101-2116.