STABLE CHANNEL CROSS-SECTION OF STRAIGHT GRAVEL RIVERS WITH TREES ON BANKS
نویسندگان
چکیده
منابع مشابه
Sediment supply controls equilibrium channel geometry in gravel rivers.
In many gravel-bedded rivers, floods that fill the channel banks create just enough shear stress to move the median-sized gravel particles on the bed surface (D50). Because this observation is common and is supported by theory, the coincidence of bankfull flow and the incipient motion of D50 has become a commonly used assumption. However, not all natural gravel channels actually conform to this...
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modeling the hydraulic geometry of gravel rivers is of intrest to hydraulic engineers, hydrologists and enviromental scientists who are engaged in predicting the adjustments of an alluvial channel to an altered upstream runoff or sediment supply. the widely used qualitative and regime models, while indicating the general direction of river adjustment, are not able to deal with river response at...
متن کاملEquivalent roughness of gravel-bed rivers
The relation between the equivalent roughness and different grain size percentiles of the sediment in gravel-bed rivers was determined under the hypothesis that the vertical distribution of the flow velocity follows a logarithmic law. A set of 954 data points was selected from rivers with gravel size sediment or larger, with a non-sinuous alignment and free of vegetation or obstacles. According...
متن کاملMonitoring Channel Change in Gravel Bed Rivers: Hyperscale Surface Modelling by Means of Terrestrial Laser Scanning
(1) Fluvial Dynamics Research Group (RIUS); www.fluvialdynamics.com. Departament de Medi Ambient i Ciències del Sòl (DMACS), Universitat de Lleida, E-25198, Lleida, Catalunya, España, [email protected] (2) Centre Tecnològic Forestal de Catalunya, E-25280, Solsona (Lleida), Catalunya, España (3) Institute of Geography and Earth Sciences, Aberystwyth University, Ceredigion SY23 3DB, Wales, UK...
متن کاملBankfull Discharge Recurrence Interval in Gravel-bed Rivers
Bankfull discharge was identified in some 30 gravel-bed rivers representing in total c. 40 gauging stations. The catchment sizes vary from 4km2 to nearly 2700km2. Bankfull discharge value increases with basin size. In the case of gravel-bed rivers developed on an impermeable substratum, the following equation emerges: Qb=0·087 A 1·044. Bankfull discharge recurrence interval was determined by fi...
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ژورنال
عنوان ژورنال: Doboku Gakkai Ronbunshu
سال: 1989
ISSN: 0289-7806,1882-7187
DOI: 10.2208/jscej.1989.411_151