干旱区生态环境知识资源中心(Arid): Spatial and temporal patterns of water salinity in the marginal grabens of Ethiopia's Danakil Depression

Arid

DOI	10.1002/ldr.3321
	Spatial and temporal patterns of water salinity in the marginal grabens of Ethiopia's Danakil Depression
	Meaza, Hailemariam 1,2; Hermans, Laurens 3; Nyssen, Jan 1; Frankl, Amaury 1,4; Zenebe, Amanuel 5; Demissie, Biadgilgn 2; Asfaha, Tesfaalem Ghebreyohannes 2; Van Eetvelde, Veerle 1; Deckers, Jozef 3; Poesen, Jean 3
通讯作者	Meaza, Hailemariam
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2019
卷号	30 期号:12 页码:1407-1422
英文摘要	Rising salinity is a severe problem associated with land degradation in arid and semiarid regions. This study seeks to understand the spatiotemporal patterns of water salinity and their implication on the downstream water availability in the marginal grabens of northern Ethiopia. We measured the electrical conductivity (EC) of flash floods, baseflows, springs, wells, and lakes. A total of 1,168 samples was collected from 177 spatially distributed water sources (2016-2017). This study shows that there was a significant difference in the EC values of the water points between rainy (1,403 +/- 425 mu S cm(-1)) and dry seasons (2,261 +/- 258 mu S cm(-1)). Besides, there is an inverse relationship between the river discharges and the runoff EC in the study area. The average value of the water EC was also higher in the limestone area than in the basalt sites. In addition, the water EC increased from the escarpments (396 +/- 176 mu S cm(-1)) towards the outlets of the graben basins (1,670 +/- 942 mu S cm(-1)). These water EC hotspots in the dry season imply that the river basins are in a closing status due to the erratic rainfall and water extraction by humans. However, the rising water EC and moisture stress endanger the existing agricultural development. Because of the extent and seriousness of salinity, integrated catchment management strategies are needed to tackle the degrading water quality and quantity in the marginal grabens along the northern Ethiopia Rift Valley.
英文关键词	basin closure electrical conductivity flash floods Rift Valley thresholds
类型	Article
语种	英语
国家	Belgium ; Ethiopia
收录类别	SCI-E
WOS记录号	WOS:000475471300002
WOS关键词	LAND-COVER CHANGES ; IRRIGATED AGRICULTURE ; SOIL SALINIZATION ; SOUTH-WESTERN ; RIVER ; GROUNDWATER ; VALLEY ; VARIABILITY ; BASIN ; MANAGEMENT
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217467
作者单位	1.Univ Ghent, Dept Geog, B-9000 Ghent, Belgium; 2.Mekelle Univ, Dept Geog & Environm Studies, Mekelle 231, Ethiopia; 3.Katholieke Univ Leuven, Dept Earth & Environm Sci, B-3000 Leuven, Belgium; 4.Res Fund Flanders FWO, B-1000 Brussels, Belgium; 5.Mekelle Univ, Dept Land Resources Management & Environm Protect, Mekelle 231, Ethiopia
推荐引用方式 GB/T 7714	Meaza, Hailemariam,Hermans, Laurens,Nyssen, Jan,et al. Spatial and temporal patterns of water salinity in the marginal grabens of Ethiopia's Danakil Depression[J],2019,30(12):1407-1422.
APA	Meaza, Hailemariam.,Hermans, Laurens.,Nyssen, Jan.,Frankl, Amaury.,Zenebe, Amanuel.,...&Poesen, Jean.(2019).Spatial and temporal patterns of water salinity in the marginal grabens of Ethiopia's Danakil Depression.LAND DEGRADATION & DEVELOPMENT,30(12),1407-1422.
MLA	Meaza, Hailemariam,et al."Spatial and temporal patterns of water salinity in the marginal grabens of Ethiopia's Danakil Depression".LAND DEGRADATION & DEVELOPMENT 30.12(2019):1407-1422.