Abstract
Short term temporal variations in bedload transport rates were investigated in two different environments during flood flows, one at Squaw Creek, Montana, a temperate mountain stream with coarse-grained sediment, the other at Nahal Yatir and Nahal Eshtemoa, Israel, both ephemeral channels subject to a semi-arid climate and also with a coarse gravel-bed. The results of the Squaw Creek electro-magnetic bedload measuring station were compared to the Birkbeck type slots in Israel. Bedload transport rates for both measuring stations are comparable since they both take high resolution measurements at minute intervals across the entire channel width. Whereas the Squaw Creek measuring station has the advantage of continuously measuring single particle transport as induced by the transfer of naturally magnetic particles over two detector sills, the Nahal Yatir and Eshtemoa measure bedload on the basis of trap filling rates. The temporal nature of sediment transport in both environments is similiar, as indicated by repeated pulsing. Short term bedload fluctuations are independant of the discharge magnitude but dependant on its duration or change in magnitude.
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Ergenzinger, P., de Jong, C., Laronne, J., Reid, I. (1994). Short term temporal variations in bedload transport rates: Squaw Creek, Montana, USA and Nahal Yatir and Nahal Estemoa, Israel. In: Ergenzinger, P., Schmidt, KH. (eds) Dynamics and Geomorphology of Mountain Rivers. Lecture Notes in Earth Sciences, vol 52. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0117844
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DOI: https://doi.org/10.1007/BFb0117844
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