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Combination of gradually varied flow theory and simulated annealing optimization in of manning roughness coefficient | ||
| Journal of Applied Research in Water and Wastewater | ||
| مقاله 2، دوره 5، شماره 1 - شماره پیاپی 9، خرداد 2018، صفحه 381-388 اصل مقاله (1.43 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22126/arww.2018.865 | ||
| نویسندگان | ||
| Majid Heydari* 1؛ Jalal Sadeghian2؛ Saeid Shabanlou3 | ||
| 1Department of Water Science and Engineering, Faculty of Agriculture, Bu-Ali Sina University, Hamadan, Iran. | ||
| 2Department of Civil Engineering, Faculty of Technical and Engineering, Bu-Ali Sina University, Hamadan, Iran | ||
| 3Department of Water Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran | ||
| چکیده | ||
| Manning roughness coefficient is one of the most important parameters in designing water conveyance structures. Unsuitable selection of this coefficient brings up some mistakes. This research aims to present a method to determine the Manning roughness coefficient based on a combination of optimization algorithm of simulated annealing (SA) with gradually varied flow equations. Therefore, in a lab rectangular flume of 12 m, 60 cm and 65 cm in length, width and height with fixed channel bed slope of 0.0002, nine series of water level profiles were carried out. Then, an objective function based on observed and calculated water level gradient was defined to decide on manning roughness coefficient while it was minimized with simulated annealing optimization method. The values of objective function parameters were discussed by sensitivity analysis and the most optimal objective function was obtained. To measure the accuracy of coefficient obtained, Statistics indices of R2, Root mean square error (RMSE), Mean bias error (MBE), d were used. The results showed that manning roughness coefficient has a great accuracy. | ||
| کلیدواژه‌ها | ||
| Manning roughness؛ Simulated annealing algorithm؛ Gradually varied flow؛ Nonlinear optimization | ||
| مراجع | ||
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Abrishami j., Hosseini S.M., Open-Channel Hydraulics, University of EmamReza press, Mashhad, (2011). Cereny V., Thermodynamical approach to the traveling salesman problem: an efficient simulation algorithm, J. optimization theory and applications, Springer 45 (1985) 41-51. Chow V.T., Open Channel Hydraulics, McGraw-Hill, New York, N.Y, (1959). Ding Y., Jia Y., Wang S.S.Y., Indication of manning’s roughness coefficient in shallow water flows, Journal of Hydraulic Engineering 130 (2004) 501-510. Gazer Zadeh A., Manning roughness coefficient nonlinear optimization model to estimate, Master Thesis, University of Chamran, Ahvaz, Iran, (2010). Kirkpatrick S., Gelatt C.D., Vecchi M.P., Optimization by simulated annealing, Science, 220 (1983) 671-680. Kochakzadeh S., Maghsoudi N., Free surface flow Hydraulics, Steady one dimensional flows, 7th edition, University of Tehran press, Tehran, 1 (2011). Metropolise N., Rosenbluth A., Teller A., Teller E., Equation of state calculations by fast computing machines, J. Chem. Phys 21 (1953), 1087-1092. Neguyan H.T., Fenton J.D., Identification of roughness for flood routing in compound channels, Proc.31st congress., Int. Assoc., Hydraulic Eng. and Res., Seoul, Korea, published on CD, IAHR 11-16 September (2005) 847-854. Ramesh R., Datta B., Bhallamudi S.M., Narayana A., Optimal estimation of roughness in open channel flows, Journal of Hydraulic Engineering, ASCE 126 (2000) 299-303. Tadayonfar H.R., Manning roughness coefficient effect on the distribution of roughness elements, Master Thesis, University of Ferdosi, Mashhad, Iran, (2009). | ||
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