Mesh-size insensitive turbulence modelling for the 2d shallow water equations

2020 ◽  
pp. 1342-1350
Author(s):  
G.R. Collecutt ◽  
S. Gao ◽  
W.J. Syme
Keyword(s):  
Shallow Water ◽  
Shallow Water Equations ◽  
Mesh Size ◽  
Turbulence Modelling ◽  
2D Shallow Water Equations

scholarly journals Urban Flood Modeling Using 2D Shallow-Water Equations in Ouagadougou, Burkina Faso

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2120
Author(s):  
Gnenakantanhan Coulibaly ◽  
Babacar Leye ◽  
Fowe Tazen ◽  
Lawani Adjadi Mounirou ◽  
Harouna Karambiri
Keyword(s):  
Shallow Water ◽  
Shallow Water Equations ◽  
Urban Areas ◽  
Flood Hazard ◽  
Scientific Information ◽  
Roughness Coefficient ◽  
Flood Events ◽  
African Countries ◽  
Numerical Tool ◽  
2D Shallow Water Equations

Appropriate methods and tools accessibility for bi-dimensional flow simulation leads to their weak use for floods assessment and forecasting in West African countries, particularly in urban areas where huge losses of life and property are recorded. To mitigate flood risks or to elaborate flood adaptation strategies, there is a need for scientific information on flood events. This paper focuses on a numerical tool developed for urban inundation extent simulation due to extreme tropical rainfall in Ouagadougou city. Two-dimensional (2D) shallow-water equations are solved using a finite volume method with a Harten, Lax, Van Leer (HLL) numerical fluxes approach. The Digital Elevation Model provided by NASA’s Shuttle Radar Topography Mission (SRTM) was used as the main input of the model. The results have shown the capability of the numerical tool developed to simulate flow depths in natural watercourses. The sensitivity of the model to rainfall intensity and soil roughness coefficient was highlighted through flood spatial extent and water depth at the outlet of the watershed. The performance of the model was assessed through the simulation of two flood events, with satisfactory values of the Nash–Sutcliffe criterion of 0.61 and 0.69. The study is expected to be useful for flood managers and decision makers in assessing flood hazard and vulnerability.

scholarly journals Inverse algorithms for 2D shallow water equations in presence of wet dry fronts: Application to flood plain dynamics

2016 ◽  
Vol 97 ◽  
pp. 11-24 ◽  
Author(s):  
J. Monnier ◽  
F. Couderc ◽  
D. Dartus ◽  
K. Larnier ◽  
R. Madec ◽  
...  
Keyword(s):  
Shallow Water ◽  
Shallow Water Equations ◽  
Flood Plain ◽  
2D Shallow Water Equations
Sign in / Sign up

Export Citation Format

Share Document