TY - JOUR
T1 - Continuous monitoring of bedload discharge in a small, steep sandy channel
AU - Lucía, Ana
AU - Recking, Alain
AU - Martín-Duque, José F.
AU - Storz-Peretz, Yael
AU - Laronne, Jonathan B.
N1 - Funding Information:
This study was funded by Research Projects CGL-2006-07207 and CGL2010-21754-C02-01 of the Spanish Ministry of Science and Technology. Ana Lucía received benefit from a pre-doctoral fellowship funded by the Complutense University of Madrid and Jonathan Laronne participated through a Complutense University Exchange Program. The German Federal Ministry of Education and Research (BMBF) funded the SUMAR project, allowing YSP to participate in this study. The authors acknowledge the kind collaboration of Saturnino de Alba for detrending the slope of the TLS data; Víctor and Toño Muñoz, Cristina Martín-Moreno, Miguel Ángel Sanz-Santos, Ignacio Zapico, and Agustín Blanco for their help in field work, Walter Bertoldi for assistance in the computation of bedload using his furmula for braided rivers and Guillermo Pinto in the laboratory. We acknowledge the comments of the editor, Konstantine P. Georgakakos, the associate editor, Luca Mao and two anonymous reviewers; these considerably helped to improve the original manuscript.
PY - 2013/8/8
Y1 - 2013/8/8
N2 - 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.
AB - 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.
KW - Bedload flux
KW - Braiding
KW - Ephemeral stream
KW - Reid-type slot sampler
KW - Sand-bed channel
KW - Steep stream
UR - http://www.scopus.com/inward/record.url?scp=84879432281&partnerID=8YFLogxK
U2 - 10.1016/j.jhydrol.2013.05.034
DO - 10.1016/j.jhydrol.2013.05.034
M3 - Article
AN - SCOPUS:84879432281
SN - 0022-1694
VL - 497
SP - 37
EP - 50
JO - Journal of Hydrology
JF - Journal of Hydrology
ER -