[ Modélisation des écoulements mélangés avec des polymères dans une rivière pour la gestion des risques d'inondation ]
Volume 28, Issue 1, December 2019, Pages 10–17
Walid Bouchenafa1 and Arnaud Lefevre2
1 SNF SAS, ZAC de Milieux, Rue Adriene Bolland, 42160. Andrézieux-Bouthéon, France
2 SNF SAS, ZAC de Milieux, Rue Adriene Bolland, 42160. Andrézieux-Bouthéon, France
Original language: French
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Floods are one of the most common natural disasters causing many casualties and significant economic damage around the world. Hurricane Florence and Typhoon Mangkhut in 2018 were only the last reminder of the disruption caused by the catastrophic floods. Despite significant safeguards to reduce fluvial flooding risk, further efforts are still needed. This study is part of the NABRAPOL (NEBARSKA POLYMER) project, which aims to improve the knowledge of the drag reduction effect on free surface flows, a new protection technique used to reduce the rivers flooding risk. This article presents a state of the art in terms of fluvial flow modeling in the presence of polymers to strengthen flood risk management. A modeling approach for flows mixed with polymers is described. A case study on the watercourse modeling containing a flow without and with polymers is presented. The modelling results show that the addition of polymers to the flows watercourse results in a marked drag reduction by decreasing the water depth up to 18% of its initial depth. This technique can be considered as an efficient new method for strengthening non-structural protection measures against river floods risk.
Author Keywords: flood, uniform flow, drag reduction, polyacrylamide, Mike Hydro River.
Volume 28, Issue 1, December 2019, Pages 10–17
Walid Bouchenafa1 and Arnaud Lefevre2
1 SNF SAS, ZAC de Milieux, Rue Adriene Bolland, 42160. Andrézieux-Bouthéon, France
2 SNF SAS, ZAC de Milieux, Rue Adriene Bolland, 42160. Andrézieux-Bouthéon, France
Original language: French
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Floods are one of the most common natural disasters causing many casualties and significant economic damage around the world. Hurricane Florence and Typhoon Mangkhut in 2018 were only the last reminder of the disruption caused by the catastrophic floods. Despite significant safeguards to reduce fluvial flooding risk, further efforts are still needed. This study is part of the NABRAPOL (NEBARSKA POLYMER) project, which aims to improve the knowledge of the drag reduction effect on free surface flows, a new protection technique used to reduce the rivers flooding risk. This article presents a state of the art in terms of fluvial flow modeling in the presence of polymers to strengthen flood risk management. A modeling approach for flows mixed with polymers is described. A case study on the watercourse modeling containing a flow without and with polymers is presented. The modelling results show that the addition of polymers to the flows watercourse results in a marked drag reduction by decreasing the water depth up to 18% of its initial depth. This technique can be considered as an efficient new method for strengthening non-structural protection measures against river floods risk.
Author Keywords: flood, uniform flow, drag reduction, polyacrylamide, Mike Hydro River.
Abstract: (french)
Les inondations font parties des catastrophes naturelles les plus fréquentes causant un grand nombre de victimes et des dégâts économiques significatifs dans le monde entier. Les inondations survenues à la suite de l'ouragan Florence et le typhon Mangkhut en 2018 ne sont que des derniers rappelles des perturbations qui peuvent engendrer ces évènements extrêmes. Malgré les mesures de protection importantes déployées pour réduire le risque d’inondation fluviale, des efforts supplémentaires demeurent encore nécessaires. Cette étude rentre dans le cadre de projet NABRAPOL (NEBARSKA POLYMER) qui vise à améliorer les connaissances de l'effet de réduction de la traînée sur les écoulements à surface libre, une nouvelle technique de protection utilisée pour réduire les risques d'inondation fluviale. Le présent article présente un état de l'art en terme de modélisation d'écoulement fluvial en présence des polymères dans le cadre du renforcement de la gestion des risques d'inondation. Une approche de modélisation des écoulements mélangés avec les polymères est décrite. Un cas d'étude sur la modélisation d'un cours d'eau contenant un écoulement sans et avec polymères est présenté. Les résultats de modélisation montrent que l'ajout des polymères dans les écoulements entraîne une réduction marquée de la traînée en diminuant la hauteur d'eau jusqu’à 18% de sa hauteur initiale. Cette technique peut être considérée comme une nouvelle méthode efficace pour renforcer les mesures de protection non structurelles contre les risques des inondations fluviales.
Author Keywords: Risque d'inondation, écoulement fluvial, réduction de traînée, polyacrylamide, Mike Hydro River.
How to Cite this Article
Walid Bouchenafa and Arnaud Lefevre, “Modeling of flow mixed with polymers in river for flood risk management,” International Journal of Innovation and Applied Studies, vol. 28, no. 1, pp. 10–17, December 2019.
