A FLOODING PREDICTION IN NATURAL RIVERS BY NUMERICAL CHARACTERISTICS SOLUTION

سال انتشار: 1387
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 2,709

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شناسه ملی سند علمی:

NCCE04_616

تاریخ نمایه سازی: 19 مهر 1386

چکیده مقاله:

Flooding prediction in large rivers of compound sections is studied. The highly variable unsteady entry of water and sediment to a reach and changes in base level are amongst examples of natural events that induce changes in a river flow-sediment regime. Man-made troubles to nature such as construction of hydraulic structures and the implementation of river training techniques like bank stabilisation, channel realignment, dike construction, and dredging are some examples of artificial causes and problems imposed to river sediment transport regime. Generally a study of movable bed sediment propagation can be approached mathematically from either an analytical or a numerical stand-point. Analytical solutions can be obtained for simplified cases because the three governing equations (continuity and hydrodynamic of flow-sediment transport equations) describing unsteady open channel flow with a movable boundary are first order, nonlinear partial differential equations of the hyperbolic type. Analytical models may be adequate only for an initial rapid evaluation of degradation and aggradation. Most situations, and in particular for highly variable flooding flows however, do not lend themselves to simplified solutions and more complete numerical methods then need to be adopted. In this paper numerical method of characteristics was used for prediction of flow-sediment prediction in large rivers.

نویسندگان

Hossein nezhad

Department of Mechanical Engineering, University of Sistan and Baluchestan, Zahedan, Iran.

Akbari

Department of Civil Engineering, University of Sistan and Baluchestan, Zahedan, Iran Zahedan, Iran

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  • Akbari, G.H., Wormleaton, P.R., Ghumman, A.R., A. (2003) A simple ...
  • Akbari, G.H., Wormleaton, P.R., Ghumman, A.R., S. (1996), A numerical ...
  • The 4l National Conference _ Civil Engineering- May 2008, University ...
  • Akbari, G.H. (2003) A fully coupled non-linear mathematical model for ...
  • Bettess, et-al. (1981) Mathematical simulation of sediment movement in streams. ...
  • Chen, Y. H. (1973) Mathematical modelling of Water- Sediment Routing. ...
  • Correia, L.P (1992) Numerical modelling of unsteady channel flow over ...
  • Fisher, K. (1995) Sediment transport manual. Wallingford Hydraulic Research, Wallingford ...
  • Graf, W.H. (1984) Hydraulics of sediment transport. Water Resources Publications, ...
  • Ghumman et-al. Parameter identification for sediment routing in rivers. Journal ...
  • Holly et-al. (1990) New Numeri cal/Physical Framework for Mobile-Bed Modelling. ...
  • نمایش کامل مراجع