Simplified Entropic Model for the Evaluation of Suspended Load Concentration
| Autor: | Annamaria De Vincenzo, Domenica Mirauda, Marilena Pannone |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Work (thermodynamics)
lcsh:Hydraulic engineering Field (physics) entropic model 0208 environmental biotechnology Geography Planning and Development 02 engineering and technology Aquatic Science Biochemistry suspended sediment lcsh:Water supply for domestic and industrial purposes lcsh:TC1-978 Robustness (computer science) Stream power Water Science and Technology lcsh:TD201-500 laboratory experiments Empirical modelling Mechanics concentration profile near-bed approximation 020801 environmental engineering Free surface Environmental science Suspended load Communication channel |
| Zdroj: | Water; Volume 10; Issue 4; Pages: 378 Water, Vol 10, Iss 4, p 378 (2018) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w10040378 |
| Popis: | Suspended sediment concentration is a key aspect in the forecasting of river evolution dynamics, as well as in water quality assessment, evaluation of reservoir impacts, and management of water resources. The estimation of suspended load often relies on empirical models, of which efficiency is limited by their analytic structure or by the need for calibration parameters. The present work deals with a simplified fully-analytical formulation of the so-called entropic model in order to reproduce the vertical distribution of sediment concentration. The simplification consists in the leading order expansion of the generalized spatial coordinate of the entropic velocity profile that, strictly speaking, applies to the near-bed region, but that provides acceptable results also near the free surface. The proposed closed-form solution, which highlights the interplay among channel morphology, stream power, secondary flows, and suspended transport features, allows reducing the needed number of field measurements and, therefore, the time of field activities. Its accuracy and robustness were successfully tested based on the comparison with laboratory data reported in literature. |
| Databáze: | OpenAIRE |
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