Prediction of the backwater level due to bridge constriction in waterways
| Autor: | Miri Dib, Serter Atabay, Mahsa Hashemi, Kimia Haji Amou Assar |
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| Rok vydání: | 2017 |
| Předmět: |
Engineering
Environmental Engineering business.industry 0208 environmental biotechnology Experimental data 02 engineering and technology Structural engineering Surface finish Management Monitoring Policy and Law 01 natural sciences Pollution Bridge (interpersonal) 010305 fluids & plasmas 020801 environmental engineering Deck symbols.namesake 0103 physical sciences Froude number symbols Arch business Water Science and Technology Parametric statistics Communication channel |
| Zdroj: | Water and Environment Journal. 32:94-103 |
| ISSN: | 1747-6585 |
| DOI: | 10.1111/wej.12303 |
| Popis: | This article proposes a mathematical method to calculate the backwater level at bridge constrictions for compound channels. Such a model is necessary, as many of the previously developed simple formulas yield inaccurate results. Parametric studies on a single-opening semicircular arch, single-opening semielliptical arch and single-opening straight deck bridge were also conducted using the commercial software HEC-RAS to investigate the influences of different factors on backwater level. The results indicated that the Froude number, opening ratio, discharge and roughness coefficient impact the backwater level considerably. Hence, a simple mathematical method was developed based on these parameters and validated using experimental data in a symmetrical two-stage channel with different roughness coefficients for different types of bridge models. The results obtained using the proposed formula corresponded well with the experimental data and the results obtained using the energy method, which is accurate and the most commonly used method to calculate backwater level. |
| Databáze: | OpenAIRE |
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