scholarly journals Floodplain Backwater Effect on Overtopping Induced Fluvial Dike Failure

2018 ◽  
Vol 54 (11) ◽  
pp. 9060-9073 ◽  
Author(s):  
Ismail Rifai ◽  
Kamal El Kadi Abderrezzak ◽  
Sebastien Erpicum ◽  
Pierre Archambeau ◽  
Damien Violeau ◽  
...  
Keyword(s):  
Backwater Effect ◽  
Dike Failure

Nonlinear Grey-box Identification of Sewer Networks with the Backwater Effect: An Experimental Study

2021 ◽  
Author(s):  
Krisztian Mark Balla ◽  
Casper Houtved Knudsen ◽  
Adis Hodzic ◽  
Jan Dimon Bendtsen ◽  
Carsten Skovmose Kallesoe
Keyword(s):  
Experimental Study ◽  
Backwater Effect ◽  
Sewer Networks

scholarly journals Inundation Analysis of the Oda River Basin in Japan during the Flood Event of 6–7 July 2018 Utilizing Local and Global Hydrographic Data

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1005 ◽  
Author(s):  
Shakti P. C. ◽  
Hideyuki Kamimera ◽  
Ryohei Misumi
Keyword(s):  
River Basin ◽  
Japan Meteorological Agency ◽  
Flood Event ◽  
Successful Outcome ◽  
Flood Inundation ◽  
Geospatial Information ◽  
Hydrological Simulation ◽  
Radar Rainfall ◽  
Affected Area ◽  
Backwater Effect

During the first week of July 2018, widespread flooding caused extensive damage across several river basins in western Japan. Among the affected basins were the Mabicho district of Kurashiki city in the lower part of the Oda river basin of the Okayama prefecture. An analysis of such a historical flood event can provide useful input for proper water resources management. Therefore, to improve our understanding of the flood inundation profile over the Oda river basin during the period of intense rainfall from 5–8 July 2018, the Rainfall-Runoff-Inundation (RRI) model was used, with radar rainfall data from the Japan Meteorological Agency (JMA) as the input. River geometries—width, depth, and embankments—of the Oda river were generated and applied in the simulation. Our results show that the Mabicho district flooding was due to a backwater effect and bursting embankments along the Oda River. The model setup was then redesigned, taking into account these factors. The simulated maximum flood-affected areas were then compared with data from the Japanese Geospatial Information Authority (GSI), which showed that the maximum flood inundation areas estimated by the RRI model and the GSI flood-affected area matched closely. River geometries were extracted from a high-resolution digital elevation model (DEM), combined with coarser resolution DEM data (global data), and then utilized to perform a hydrological simulation of the Oda river basin under the scenarios of backwater effect and embankment failure. While this approach produced a successful outcome in this study, this is a case study for a single river basin in Japan. However, the fact that these results yielded valid information on the extent of flood inundation over the flood-affected area suggests that such an approach could be applicable to any river basin.

scholarly journals Roughness Effect of Submerged Groyne Fields with Varying Length, Groyne Distance, and Groyne Types

Water ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1253 ◽  
Author(s):  
Ronald Möws ◽  
Katinka Koll
Keyword(s):  
Flow Resistance ◽  
Relative Increase ◽  
Design Guidelines ◽  
Water Levels ◽  
Constant Field ◽  
Initial Water ◽  
Mobile Bed ◽  
Wake Interference ◽  
Backwater Effect ◽  
Varying Length

Design guidelines were developed for a number of in-stream structures; however, the knowledge about their morphological and hydraulic function is still incomplete. A variant is submerged groynes, which aim to be applicable for bank protection especially in areas with restricted flood water levels due to their shallow height. Laboratory experiments were conducted to investigate the backwater effect and the flow resistance of submerged groyne fields with varying and constant field length and groyne distance. The effect of the shape of a groyne model was investigated using two types of groynes. The validity of different flow types, from “isolated roughness” to “quasi smooth”, was analyzed in relation to the roughness density of the groyne fields. The results show a higher backwater effect for simplified groynes made of multiplex plates, compared to groynes made of gravel. The relative increase of the upstream water level was lower at high initial water levels, for short length of the groyne field, and for larger distance between the single groynes. The highest roughness of the groyne fields was found at roughness densities, which indicated wake interference flow. Considering a mobile bed, the flow resistance was reduced significantly.

scholarly journals The backwater effect as a tool to assess formative long-term flood regimes

2020 ◽  
Vol 538 ◽  
pp. 29-43 ◽  
Author(s):  
F.X. Castelltort ◽  
E. Bladé ◽  
J.C. Balasch ◽  
M. Ribé
Keyword(s):  
Backwater Effect

ASSESSMENT OF THE URANIUM MILL TAILINGS POND DIKE FAILURE AT CHURCHROCK, NEW MEXICO: A REVIEW.

1980 ◽  
Vol 39 (6) ◽  
pp. 1019
Author(s):  
David L. Duncan ◽  
Henry D. May ◽  
Donald W. Hendricks
Keyword(s):  
New Mexico ◽  
Tailings Pond ◽  
Mill Tailings ◽  
Dike Failure ◽  
Uranium Mill Tailings

Sensitivity of the breaching process in the case of overtopping induced fluvial dike failure

2016 ◽  
Author(s):  
I Rifai ◽  
S Erpicum ◽  
P Archambeau ◽  
D Violeau ◽  
M Pirotton ◽  
...  
Keyword(s):  
Dike Failure

scholarly journals Estimation of maximum scour depth near a spur dike

2016 ◽  
Vol 43 (3) ◽  
pp. 270-278 ◽  
Author(s):  
Manish Pandey ◽  
Z. Ahmad ◽  
P.K. Sharma
Keyword(s):  
Natural Phenomenon ◽  
Scour Depth ◽  
Flowing Water ◽  
Performance Indices ◽  
Spur Dike ◽  
Bed Erosion ◽  
River Bed ◽  
Spur Dikes ◽  
Dike Failure ◽  
Better Than

Scour is a natural phenomenon in rivers caused by the erosive action of the flowing water on the bed and banks. Spur dikes are constructed across the flow to protect the bank from erosion by shifting of the river away from the bank. The spur dike undermines due to river-bed erosion and scouring, which is generally recognized as the main cause of spur dike failure. In this study, accuracy of existing equations for the computation of maximum scour depth has been checked with available data in the literature and data collected in the present study using graphical and statistical performance indices. Three new relationships are also proposed to estimate the maximum scour depth and maximum scour length upstream and downstream of spur dike. This new relationship for maximum scour depth is shown to perform better than other existing equations.

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