Flushing Flows

2018 ◽  
pp. 91-135 ◽  
Author(s):  
Dudley W. Reiser ◽  
Michael P. Ramey ◽  
Thomas A. Wesche
Keyword(s):  
Flushing Flows

A MODEL FOR FIXED ALGAE MANAGEMENT IN OPEN CHANNELS USING FLUSHING FLOWS

2011 ◽  
Vol 28 (7) ◽  
pp. 960-972 ◽  
Author(s):  
O. Fovet ◽  
G. Belaud ◽  
X. Litrico ◽  
S. Charpentier ◽  
C. Bertrand ◽  
...  
Keyword(s):  
Open Channels ◽  
Flushing Flows

Suspended sediment dynamics during flushing flows in a large impounded river (the lower River Ebro)

2014 ◽  
Vol 14 (12) ◽  
pp. 2057-2069 ◽  
Author(s):  
Alvaro Tena ◽  
Damià Vericat ◽  
Ramon J. Batalla
Keyword(s):  
Suspended Sediment ◽  
Sediment Dynamics ◽  
Flushing Flows

Treating causes not symptoms: restoration of surface - groundwater interactions in rivers

2009 ◽  
Vol 60 (9) ◽  
pp. 976 ◽  
Author(s):  
Tamao Kasahara ◽  
Thibault Datry ◽  
Michael Mutz ◽  
Andrew J. Boulton
Keyword(s):  
River Restoration ◽  
Fluvial Geomorphology ◽  
Hydraulic Gradient ◽  
River Ecosystem ◽  
Ecological Connectivity ◽  
Alluvial Rivers ◽  
Vertical Hydraulic Gradient ◽  
Groundwater Exchange ◽  
Sediment Permeability ◽  
Flushing Flows

Many river restoration projects seek to address issues associated with impaired hydrological and ecological connectivity in longitudinal (e.g. effects of dams, weirs) or lateral (e.g. alienated floodplain) dimensions. Efforts to restore the vertical dimension of impaired stream–groundwater exchange are rare, hampered by limited understanding of the factors controlling this linkage in natural alluvial rivers. We propose a simplified two-axis model of the ‘primary drivers’ (sediment structure and vertical hydraulic gradient) of stream–groundwater exchange that acknowledges their interaction and provides a practical template to help researchers and river managers pose hypothesis-driven solutions to restoration of damaged or lost vertical connectivity. Many human activities impact on one or both of these drivers, and we review some of the tools available for treating the causes (rather than symptoms) in impacted stream reaches. For example, creating riffle-pool sequences along stream reaches will enhance vertical hydraulic gradient, whereas flushing flows can remove clogging layers and sustain sediment permeability. Our model is a first step to specifying mechanisms for recovery of lost vertical connectivity. Assessing results of river restoration using this approach at reach to catchment scales will provide scientific insights into the interplay of hydrology, fluvial geomorphology and river ecosystem function at appropriately broad scales.

Tradeoffs in river restoration: Flushing flows vs. hydropower generation in the Lower Ebro River, Spain

2014 ◽  
Vol 518 ◽  
pp. 130-139 ◽  
Author(s):  
Carlos M. Gómez ◽  
C. Dionisio Pérez-Blanco ◽  
Ramon J. Batalla
Keyword(s):  
River Restoration ◽  
Hydropower Generation ◽  
Ebro River ◽  
Flushing Flows

scholarly journals Numerical investigation on bottom shear stress induced by flushing gate for sewer cleaning

2019 ◽  
Vol 80 (2) ◽  
pp. 290-299
Author(s):  
Haoming Yang ◽  
David Z. Zhu ◽  
Yiping Zhang ◽  
Yongchao Zhou
Keyword(s):  
Fluid Dynamics ◽  
Shear Stress ◽  
Transient Flow ◽  
Flow Characteristics ◽  
Bottom Shear Stress ◽  
Sewer Pipe ◽  
Storage Volume ◽  
Flow Information ◽  
Computational Fluid Dynamics Cfd ◽  
Flushing Flows

Abstract One of the most common strategies for sewer cleaning is to generate flushing flows using flushing gates to store water in the upstream sewer pipe. Therefore it is important to obtain the flow information on the flushing waves and their eroding effects. In this study, the flow characteristics of the flushing wave and the flushing effect were investigated by a transient flow calculation using a commercial computational fluid dynamics (CFD) code. The values of bottom shear stress were obtained and the effect of several factors are discussed. The water depth and the slope were related to the release rate of the storage volume, while the flushing volume determined the flushing distance at long sewer distances. The initial downstream water level was found to dramatically reduce the flushing effect. Equations based on the storage depth were developed to estimate the flushing effect, and suggestions for the installation and operation of flushing gates are provided.

From flushing flows to (eco)morphogenic releases: evolving terminology, practice, and integration into river management

2021 ◽  
Vol 213 ◽  
pp. 103475
Author(s):  
Rémi Loire ◽  
Hervé Piégay ◽  
Jean-René Malavoi ◽  
G. Mathias Kondolf ◽  
Leah A. Bêche
Keyword(s):  
River Management ◽  
Flushing Flows
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