Sediment–flow interactions at channel confluences: A flume study
Jun 26, 2015 · In this article, based on the water–sediment boundary significantly impacting on region of confluence reaches, taking experiments as the foundation, systemic analyzed the impact of upstream sediment supplies on characteristics of sediment aggradation and erosion at confluence reaches under different water–sediment conditions.
Methods to control bed erosion at 90° river confluence: an …
Apr 10, 2017 · Confluence is a common occurrence in rivers. The convergence of flows often leads to erosion of the river bed and formation of a deep scour-hole at the confluence. In the present experimental study, vanes and circular piles are proposed as scour mitigation measures.
Methods to control bed erosion at 90 0 river confluence: An ...
Mar 17, 2017 · Confluence is a common occurrence in rivers. The convergence of flows often leads to erosion of the river bed and formation of a deep scour-hole at the confluence. In the present experimental...
Control of Bed Erosion at 60° River Confluence Using Vanes
Feb 16, 2017 · The present experimental study is focused to investigate control of bed erosion at the confluence using vane and circular pile models. The vanes and circular piles are used as flow training structures to protect the river banks and to control the sediment entry into intake canal by modifying flow pattern, respectively [ 50 – 52 ].
Confluence effects in rivers: Interactions of basin scale, network ...
May 28, 2004 · Effects of confluences on river morphology are conditioned by basin shape and channel network patterns, and they include the nonlinear separation of geomorphically significant confluences in river networks. Other modifying factors include local network geometry and drainage density.
Confluence Dynamics in a Modelled Large Sand-Bed Braided …
Sep 3, 2019 · Confluences often migrate downstream due to deposition at scour hole heads and erosion at tails, which is also common in natural rivers and has been suggested to be controlled by aggradation in the confluence area and local avulsions of the primary channel .
Bed erosion control at 60 degree river confluence using vanes
The aim of this experimental study is to check the performance of vanes in controlling bed erosion at the confluence. Experiments are performed in a 600 confluence mobile bed model with a non-uniform sediment of mean particle size d50 = 0.28mm.
A Landscape Assessment and Associated Dataset of Stream …
For example, conversion of forest to urban would likely lead to increased erosion, which may change confluence dynamics. To demonstrate the utility of the dataset, we classify conterminous U.S. stream confluences using available data on ecological conditions and overlay the classification results with other attributes included in the dataset.
Dynamics of a river channel confluence with discordant beds: Flow ...
Nov 22, 2006 · To examine the relations between flow and sediment transport, we have measured near-bed flow turbulence, bed load transport rates, and changes in bed morphology for eight different flow conditions at a sand bed discordant confluence.
The planform mobility of river channel confluences: Insights from ...
Jan 1, 2018 · These adjustments range in scale from within-channel change, to bar deposition and erosion within the confluence zone, to channels migrating within a defined belt via meandering or braiding, to highly mobile confluences that migrate an order of magnitude greater than the channel width.