Continuous monitoring of bedload discharge in a small, steep sandy channel



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Lucía Vela, Ana and Recking, Alain and Martín Duque, José Francisco and Storz Peretz, Yael and Laronne, Jonathan (2013) Continuous monitoring of bedload discharge in a small, steep sandy channel. Journal of hydrology, 497 . pp. 37-50. ISSN 0022-1694, ESSN: 1879-2707

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This paper reports on bedload flux and texture monitored in a natural, steep, sandy ephemeral channel draining a small gullied sandy watershed, the Barranca de los Pinos (1.32 ha), Spain. Bedload flux was continuously monitored with two independent Reid-type slot samplers; bedload texture was determined from the sediment collected in the samplers. Channel morphology was surveyed with a high spatial resolution with a Terrestrial Laser Scanner. The monitored instantaneous bedload fluxes are among the highest measured in natural rivers, characterized by high temporal and spatial variability related to the presence of bedforms, shallow bars and sand sheets, and to the reworking of the dry bed between and at the end of individual flow events. The grain size distribution of the bedload indicates equal mobility; but bedload texture fluctuates, depicting the transport of coarser bar surfaces and of finer-grained anabranch surfaces as well as of the overall bed subsurface.

Item Type:Article
Uncontrolled Keywords:Bedload flux; Sand-bed channel; Ephemeral stream; Steep stream; Reid-type slot sampler; Braiding
Subjects:Sciences > Geology > Hidrology
ID Code:58114
Deposited On:18 Dec 2019 09:56
Last Modified:18 Dec 2019 11:49

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