干旱区生态环境知识资源中心(Arid): From runoff contributor to runoff absorber: Spate irrigation on exclosures in Tigray's semi-arid environment (Ethiopia)

Arid

DOI	10.1002/eco.2480
	From runoff contributor to runoff absorber: Spate irrigation on exclosures in Tigray's semi-arid environment (Ethiopia)
	Guyassa, Etefa; Frankl, Amaury; Jacob, Miro; Zenebe, Amanuel; Damtew, Abebe; Tolera, Motuma; Descheemaeker, Katrien; Poesen, Jean; Nyssen, Jan
通讯作者	Nyssen, J
来源期刊	ECOHYDROLOGY
ISSN	1936-0584
EISSN	1936-0592
出版年	2023
卷号	16 期号:1
英文摘要	Despite many years of establishment of exclosures in the semi-arid environments of north Ethiopia for rehabilitation of degraded areas, its effectiveness is constrained by water deficit. There is lack of empirical data on the response of vegetation to additional water (spate irrigation) application. This study aimed to evaluate the effects of spate irrigation using storm runoff on the growth of trees in exclosures. Two exclosures (May Ba'ati and Adi Kolakol), in Dogu'a Temben district, Tigray, north Ethiopia, were used for this study. Each exclosure was divided in two blocks (irrigated and non-irrigated) to allow comparison of change of vegetation using several diversity indices as well as contrasts in tree ring widths. The amount of spate irrigation water diverted onto the exclosures (762 mm) was in the same order of magnitude as the direct rainfall on the sites (645 mm). The results show that the irrigated exclosures have larger species richness, Shannon-Weaver diversity index, tree density, abundance, evenness and basal area than the non-irrigated areas. Following low rainfall (353 mm) in 2015, these indices decreased in the non-irrigated area, whereas most indices remained much higher in the irrigated area. The findings indicate that diverting runoff to exclosures results in an average 15% increase in ring width as compared to non-irrigated trees. In addition, there is strong abstraction of storm runoff in gullies in the study area. Besides the promotion of forestry in washout semi-arid areas of existing spate irrigation systems, we suggest to apply spate irrigation to exclosures in order to improve their productivity.
英文关键词	diversity indices forestry gully hydrology plant density stormwater diversion tree ring water balance
类型	Article
语种	英语
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000866260600001
WOS关键词	AFROMONTANE FOREST ; CHECK DAMS ; NORTHERN ; HIGHLANDS ; DIVERSITY ; GROWTH ; VARIABILITY ; VEGETATION ; EROSION
WOS类目	Ecology ; Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395888
推荐引用方式 GB/T 7714	Guyassa, Etefa,Frankl, Amaury,Jacob, Miro,et al. From runoff contributor to runoff absorber: Spate irrigation on exclosures in Tigray's semi-arid environment (Ethiopia)[J],2023,16(1).
APA	Guyassa, Etefa.,Frankl, Amaury.,Jacob, Miro.,Zenebe, Amanuel.,Damtew, Abebe.,...&Nyssen, Jan.(2023).From runoff contributor to runoff absorber: Spate irrigation on exclosures in Tigray's semi-arid environment (Ethiopia).ECOHYDROLOGY,16(1).
MLA	Guyassa, Etefa,et al."From runoff contributor to runoff absorber: Spate irrigation on exclosures in Tigray's semi-arid environment (Ethiopia)".ECOHYDROLOGY 16.1(2023).