1D modelling of dam-break surges with floating debris

Mambretti, S.; Larcan, E.; Wrachien, Daniele De

doi:10.1016/j.biosystemseng.2008.02.011

Cited by 11 publications

(9 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We assume a one-phase model. State variables are the wetted cross-section area A and the discharge Q [12,20].…”

Section: Mathematical Modelmentioning

confidence: 99%

See 1 more Smart Citation

Numerical modelling of catastrophic events produced by mud or debris flows

Schippa¹,

Pavan²

2011

Int. J. SAFE

View full text Add to dashboard Cite

Mud and debris fl ows are natural phenomena representing serious hazard for population and structures in mountain zones, because of their rapid occurrence and the diffi culty in forecasting the phenomena initiation. Numerical models can however be useful in predicting the peak discharge and the strength of fl owing mass, helping administrations in preparing risk mitigation measures. In this work, a numerical model for hyperconcentrated fl ows is presented. It is based on shallow water equations, with a particular source terms treatment which translates into an increased numerical stability and makes the model highly versatile. The test case applications focus on some fundamental characteristics necessary for debris-and mud-fl ow representation. In particular, classic dam-break problems have been used to test wave celerity and wet-dry fronts propagation, while a mud-fl ow dam-break problem has been chosen to investigate model sensibility to different rheological schemes. Then, the model has been applied to two real events that occurred in Northern Italy. The fi rst one is a debris fl ow which took place at Acquabona, near Cortina d'Ampezzo. This event is extensively documented, since it has been observed by a monitoring station prepared by the University of Padua. The second one is a tragic event, during which the little town of Stava has been stricken by a destructive mud fl ow caused by the collapse of two earth dams.

show abstract

“…We assume a one-phase model. State variables are the wetted cross-section area A and the discharge Q [12,20].…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Considering the momentum balance eqn (20), it is worth noting the presence of the "reduced bottom slope" S 0 (1 -cosϑ). Nevertheless, comparing the reduced bottom slope S 0 (1 -cosϑ) with the friction slope S f , it is clear that the latter has a different order of magnitude if compared with the former.…”

Section: Mathematical Modelmentioning

confidence: 99%

Numerical modelling of catastrophic events produced by mud or debris flows

Schippa¹,

Pavan²

2011

Int. J. SAFE

View full text Add to dashboard Cite

show abstract

“…These equations have wide applicability in the study of free surface flow. Amongst them is the flow in open channels with steep slopes [20], flows over rough infiltrating surfaces [21], propagation of flood waves Rivers [22,23], and dam break flow [24].…”

Section: The Hydrodynamic Modelmentioning

confidence: 99%

Linking Numerical Water Quality Models in an Environmental Information System for Integrated Environmental Assessments

Torres-Bejarano¹,

Ramírez²,

Denzer³

et al. 2013

JEP

View full text Add to dashboard Cite

Decision makers involved in prevention of water contamination often lack the technical knowledge of water quality evaluation or the comprehension of complex software for environmental information management required to make effective decisions. Providing information about the environment is not an easy task due to its complex structure, relationships, and dynamic processes. Because environmental models play an important role in environmental decision support systems, the integration of models into user-friendly integrated information systems is a key factor in the support of such users. This paper presents an environmental information system which supports water protection of Coatzacoalcos River in Mexico, having as a main building block water quality assessments supported by mathematical modeling through the two-dimensional Saint Venant and Advection-Diffusion-Reaction equations to calculate the river hydrodynamics and the contaminant transport, respectively. The mathematical modeling solution yields appropriate results representing the river contaminant distribution when compared with field measurements. But the direct use of these models by decision makers is difficult at best, meaning they are not likely to be used in making practical decisions. The system described in this paper integrates these models, and several other tools, into a seamless, user-centered application, improving model usability, initial configuration, and results visualization.

show abstract

“…These equations have a wide applicability in the study of free surface flow. For example, the flow in open channels with steep slopes (Salaheldin et al, 2000), flows over rough infiltrating surfaces (Wang et al, 2002), propagation of flood waves Rivers (Ying et al, 2003), dam break flow (Mambretti et al, 2008), among others. In this equations system, it was assumed that the effect of the Coriolis force and tensions due to wind at the free surface are negligible given the nature of the problems that focus this work, although their inclusion in the numerical scheme can be done without difficulty.…”

Section: The Hydrodynamic Modulementioning

confidence: 99%