We present an experimental and theoretical study of whether a large displacement wave can lead to catastrophic erosional incision of a moraine damming a glacial lake. The laboratory experiments consist of reservoirs held by barriers of granular materials in a glass tank; the theoretical model combines the Saint-Venant equations of hydraulic engineering with an empirical prescription for erosion. The results of both the laboratory experiments and the numerical simulations indicate that a single wave is generally unable to break the dam, but a sufficiently large disturbance in an almost-filled reservoir creates a seiche that can repeatedly overtop the dam. In such a case, the combined effect of the multiple erosion events ultimately breaks the dam.
Dam breaking by wave-induced erosional incision / Balmforth, N. J.; von Hardenberg, J.; Provenzale, A.; Zammett, R.. - In: JOURNAL OF GEOPHYSICAL RESEARCH: EARTH SURFACE. - ISSN 0148-0227. - 113:F1(2008). [10.1029/2007JF000756]
|Titolo:||Dam breaking by wave-induced erosional incision|
|Data di pubblicazione:||2008|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1029/2007JF000756|
|Appare nelle tipologie:||1.1 Articolo in rivista|