干旱区生态环境知识资源中心(Arid): Assessment of subsurface riverbed clogging by fine sediments in a semi-arid catchment of north-western Algeria

Arid

DOI	10.2989/16085914.2020.1719814
	Assessment of subsurface riverbed clogging by fine sediments in a semi-arid catchment of north-western Algeria
	Bendaoud, A. M.; Haddou, K. A.; Taleb, A. M.; Belaidi, N. O.
通讯作者	Bendaoud, AM
来源期刊	AFRICAN JOURNAL OF AQUATIC SCIENCE
ISSN	1608-5914
EISSN	1727-9364
英文摘要	In semi-arid regions, natural and anthropogenic disturbances increase the input of fine particles and their subsequent accumulation in streambeds sediment. The clogging of streambeds sediment is caused by the infiltration of fine particles at depth, reducing hydraulic conductivity (K) and hyporheic flow. Grain-size distribution and streambed vertical K were estimated using hyporheic sediment samples collected from ten stations in the Tafna River catchment during two hydrological periods of high and low water in order to investigate spatiotemporal variations and the variables influencing hydraulic conductivity. During the wet season, the upstream part of the catchment had significantly higher coarse sand content, with K measured to be three times greater than downstream. During low flow periods, there were significantly more fine particles (clay and silt) downstream, which were negatively correlated with K. Increases in clay and silt were the main cause of sediment clogging in the downstream part of catchment. However, within-group PCA showed that geomorphology had no significant influence on hyporheic sediment clogging. This study demonstrated that the process of streambed sediment clogging was influenced by the accumulation of fine particles and organic matter, which significantly contributed to the clogging of the downstream hyporheic zone, thus decreasing hydraulic conductivity despite prevailing geomorphology.
英文关键词	geomorphology grain-size hydraulic conductivity hyporheic zone Tafna River
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000587533500001
WOS关键词	STREAMBED HYDRAULIC CONDUCTIVITY ; WATER EXCHANGE ; HYPORHEIC ZONE ; DYNAMICS ; ACCUMULATION ; SURFACE ; BEDS ; DEPOSITION ; MORPHOLOGY ; COLMATION
WOS类目	Marine & Freshwater Biology
WOS研究方向	Marine & Freshwater Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328457
作者单位	[Bendaoud, A. M.; Haddou, K. A.; Taleb, A. M.; Belaidi, N. O.] Univ Tlemcen, Lab Ecol & Gest Ecosyst Nat LECGEN, Tilimsen, Algeria
推荐引用方式 GB/T 7714	Bendaoud, A. M.,Haddou, K. A.,Taleb, A. M.,et al. Assessment of subsurface riverbed clogging by fine sediments in a semi-arid catchment of north-western Algeria[J].
APA	Bendaoud, A. M.,Haddou, K. A.,Taleb, A. M.,&Belaidi, N. O..
MLA	Bendaoud, A. M.,et al."Assessment of subsurface riverbed clogging by fine sediments in a semi-arid catchment of north-western Algeria".AFRICAN JOURNAL OF AQUATIC SCIENCE