INFLUENCE OF GRAIN SIZE ON SEDIMENT DISCHARGE RATE

Autor:	Shinji Egashira, Takahiro Itoh
Rok vydání:	2001
Předmět:	Flume Organic Chemistry Shear stress Sediment Grain size effect Geotechnical engineering Mechanics Biochemistry Debris Geology Grain size Bed load Discharge rate
Zdroj:	PROCEEDINGS OF HYDRAULIC ENGINEERING. 45:649-654
ISSN:	1884-9172 0916-7374
DOI:	10.2208/prohe.45.649
Popis:	Bed-load formulas that have been proposed are roughly classified into two types. One predicts the bed load rate proportional to τ*3/2 and the other calculates it proportional to τ*5/2, in which τ is the non-dimensional bed shear stress. The present study describes the influence of grain size on bed loadrate, based on Egashira et al.'s constitutive relations of debris flows as well as on flume data. The results show the thickness and averagevelocityof bed-load layer are proportional to τ*and τ*3/2, respectively, and suggest that the formula which is a τ*5/2-type is much reasonable from a view point of sediment dynamics.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::934c5f773eaa6326bd90c7566f8fa3e9 https://doi.org/10.2208/prohe.45.649 Zobrazit plný text záznamu