Test hydraulique du filtre Kipo 3000

Report (2010)

Caractérisation micro-échelle du risque d’inondation : modélisation hydraulique détaillée et impacts socio-économiques

in Risque d'Inondation en Ile de France, 100 ans après les crues de 1910 (2010, March)

Contribution to the study of piano Key Weir hydraulics

in Proceedings of the 8th ICOLD European Club Symposium (2010)

Within the framework of updating the release and storage capacities of existing reservoirs, the use of piano key weirs (PKW) can be an interesting alternative either to increase the discharge of a free ... [more ▼]

Within the framework of updating the release and storage capacities of existing reservoirs, the use of piano key weirs (PKW) can be an interesting alternative either to increase the discharge of a free weir without changing the weir width on the dam crest nor the reservoir level, or to increase the threshold reservoir level before releasing water while keeping the weir width and the level of safety. Results of first experiments on scale models have shown the high efficiency of PKW in terms of discharge capacity. But, even if PKW projects start to be developed on real structures, lacks persist in the understanding of the flow behavior on this new type of weir, in the characterization of their hydraulic potential and in the availability of design guidelines. This paper presents the results of several research projects, based on both numerical and physical modeling, carried out on this topic at the Laboratory of Engineering Hydraulics of the University of Liege. The researches rely on physical experiments on scale models of idealized PKW elements or real structures, as well as on numerical modeling with specifically developed solvers. The paper presents an overview of these projects, emphasizing the most important results regarding PKW design and performance. [less ▲]

Depth-averaged modelling of hyperconcentratedflows. Application to the failure of tailing dams and waste dumps

Conference (2010)

Classification of flow patterns in rectangular shallow reservoirs

in Journal of Hydraulic Research (2010), 48(2), 197-204

This work focuses on the experimental classification of flow patterns in rectangular shallow reservoirs, including symmetric flows without any reattachment point to asymmetric flows with one reattachment ... [more ▼]

This work focuses on the experimental classification of flow patterns in rectangular shallow reservoirs, including symmetric flows without any reattachment point to asymmetric flows with one reattachment point, two reattachment points, or two reattachment points and one detachment point. The median position and the natural variability of the reattachment lengths of asymmetric flows were measured for forty geometric and hydraulic conditions. The effects of dimensionless flow depth, Froude number, lateral expansion ratio and dimensionless length on the median reattachment lengths were analyzed. A number of regression equations were proposed. For “high” dimensionless flow depths and a Froude number of 0.20, a shape parameter was proposed for predicting the transition between symmetric and asymmetric flows. The results of this study are useful knowledge for improving current methods to predict the trapping efficiency and the preferential regions of deposition in reservoirs. [less ▲]

Modelling Free-surface Flows and Highly Transient Mixed Flows: A 1D Three-phase Approach

in Proc. 1st European IAHR Congress (2010)

An Extended Shallow-water-like Model Applied to Flows in Environmental and Civil Engineering

in Hirsch, Gerhard; Kappel, Bernd (Eds.) Hydraulic Engineering: Structural Applications, Numerical Modeling and Environmental Impacts (2010)

Objective of this text is to rigorously develop a unified mathematical model to simulate a wide range of environmental flows. Particular emphasis is placed on flows relevant in civil and environmental ... [more ▼]

Objective of this text is to rigorously develop a unified mathematical model to simulate a wide range of environmental flows. Particular emphasis is placed on flows relevant in civil and environmental engineering. [less ▲]

Detailed inundation modelling using high resolution DEMs

in Engineering Applications of Computational Fluid Mechanics (2010), 2(4), 196-208

With the availability of high resolution DEMs, relevant and detailed inundation maps may now be routinely computed provided that suited flow models are available. The full 2D flow model presented in this ... [more ▼]

With the availability of high resolution DEMs, relevant and detailed inundation maps may now be routinely computed provided that suited flow models are available. The full 2D flow model presented in this paper has been used to compute such maps on 800 km of the main rivers of the Walloon Region in Belgium. The use of grid spacing of 1 m, similar to the DEM resolution, enables to accurately predict the pattern of flood depth. This is confirmed by several application examples, which also demonstrate the ability of the model to reproduce depth measurements for a wide range of flood discharges without the need for recalibration of the roughness coefficient. The numerical model has been systematically validated by comparison with observations during recent real flood events. It shows a very good agreement with field data, in particular regarding free surface elevations and inundation extension. [less ▲]

Transport of Dispersed Phase in Civil Engineering: Unification of the Mathematical Description

in Janssen, Robert; Chanson, Hubert (Eds.) Hydraulic Structures: Useful Water Harvesting Systems or Relics? (2010)

Reliable hydraulic numerical modeling with multiblock grids and linked models

in Proc. Int. Conf. SimHydro 2010: Hydraulic modeling and uncertainty (2010)