In the framework of an experiment devoted to the study of runoff generation on six arid talus mantled slopes, runoff samples loaded with fine sediment were taken at short intervals. These samples allowed an analysis to be made of the relationships existing between sediment concentration and sediment discharge to the runoff discharge of such slopes. Sediment concentrations varied from 0.5 to 59 g/1., and sediment yields from 0.9 to 24.2 g/m2 Whereas a positive linear relationship was obtained between runoff discharge and sediment discharge, no clear relationship was obtained between runoff discharge and sediment concentration. The highest concentrations were recorded in the initial runoff, followed by a rapid decrease in concentration during the rising flow stage. A second peak of sediment concentration appeared at the fall stage of the flow. These results are tentatively explained by the varying role of splash and flow velocity on sediment detachment and transport processes during the flow event.
|Number of pages||13|
|Journal||Hydrological Sciences Bulletin|
|State||Published - Sep 1977|
Bibliographical noteFunding Information:
Acknowledgements. Financial support of the Hebrew University Research Fund is gratefully acknowledged. Special thanks are accorded to Dr Y. Morin and Mr M. Agassi of the Ministry of Agriculture, Station for Soil Erosion Research, for their help and advice in the use of the sprinkling equipment; to Mr H. Levy, Mr Y. Rutin and Mr Y. Trostler for their technical help in the installation of the instrumentation; and to Mrs T. Sofer for drawing the illustrations and finally, to Dr R. Gerson of the Hebrew University and Prof. R.B. Bryan of the University of Toronto for critically reading the manuscript.