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Dal Monte, L., & Di Silvio, G. (2002). Suspended sediments concentration in the shoals of a tidal lagoon. Scientific Research and Safeguarding of Venice, Corila Research Program 2001 Results, I, 259–272.
Added by: Dott. Alessandro Meggiato (28/05/2014 16:19:44)
|Tipo di Risorsa: Articolo di Rivista
Chiave di citazione BibTeX: DalMonte2002
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Keywords: extend abstract corila, idraulica, idrodinamica, morfologia, processi ambientali - Environmental Processes, sedimentologia
Creatori: Dal Monte, Di Silvio
Collezione: Scientific Research and Safeguarding of Venice, Corila Research Program 2001 Results
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In this research we derive an expression for the “representative concentration” of suspended sediments in the shoals, affected by the interaction between the most relevant hydrodynamic and morphodynamic mechanisms at work in a lagoon.
“The representative concentration” in a location of the lagoon is defined as the long-term averaged value of the instantaneous concentration.
The instantaneous concentration is computed with a monomial transport formula (Engelund and Hansen type) where the bottom velocity is proportional to the height of significant wave. Using a monomial expression that approximates the Bretschneider formula, the height of the significant wave is related to the length of the fetch and the wind velocity. By introducing some approximations of the usual formulas and some hypothesis on the statistical distribution of the wind and of the fetch, an expression is obtained for the local concentration averaged over the year and over the wind directions.
The equilibrium conditions should lead to an almost uniform distribution of the suspended sediments concentration over the lagoonal basin. This circumstance suggests new areas of future work based on the correlation between morphometric characteristics of the shoals and the marshes of a tidal lagoon.
Added by: Dott. Alessandro Meggiato