Study of Structure Formation on Riverbed and its Relationship with Geomorphology

Abstract:

Riverbed structures were developed in many very coarse gravel-bed rivers as a result of fluvial morphology. And the distribution of them was obviously relevant with environment conditions. This paper carried out field investigations in natural rivers, to study the riverbed structures size, distribution in the basin, as well as their connections with local environmental conditions. The results indicated that: The structures can enhance resistance to water erosion and protect riverbed. Given the conditions of little bedload, the structure intensity is in direct ratio to the unit-width stream power which consumed by the structures when rivers are in dynamic equilibrium. If the structures are not able to dissipate the whole power, the river status turns to disequilibrium and the riverbed will be eroded by excess energy. The fluvial morphology of coarse-grained riverbed is controlled by this process.

• Periodical: Applied Mechanics and Materials (Volumes 405-408)
• Pages: 2260-2263
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.405-408.2260
• Online since: September 2013
• Authors: Huai Xiang Liu, Yong Jun Lu
• Keywords: Bedload, Evolution, Fluvial Morphology, Gradient

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