Effect of spur dike as a protective structure on riverbend using a mathematical model CCHE2D (Case Study: Hormozgan Minab River)

Document Type : Research Article

Authors

1 Professor, Faculty of Environment, University of Tehran

2 MSc. in Watershed Management, Department of Natural Resources, University of Hormozgan

3 Assistant Professor, Soil Conservation and Watershed Management Research Institute

4 Graduate Master in Watershed Management, Department of Natural Resources, University of Yazd

Abstract

Instability of river bank leads to lots of problems in short and long terms. Gradual destruction of river bank, consequently, gives rise to risk for structures and lands along the river coast. It can cause the field of sedimentation, reducing local angle of meanders and finally, making a new path for river. The current study presents a numerical modeling of the effect of successive spur dike on flow and sediment patterns and provides protection for the bank of Minab River using two-dimensional model CCHE2D. The parameters used for calibration include water depth and flow rate, measured in three river banks. At this stage, optimal networking of different models were used, moreover, Network 50*500 was chosen because it was closer to the results of field measurements. The results of this study show that geometry of river flow and sediment regulated and guided the breakwater in the Thalweg river velocity and shear stress influences, so that a spur dike can decrease velocity by 66 percent, leading to deviation of maximum velocity lines from the banks and river bank zone, obviating 20 cm erosion and substituting 5 cm sediment on bank zone and finally it will establish and protect river banks.

Keywords

Main Subjects

References

منابع
1-      Leopold, L. B. and M.G. Wolman. 1994. River channel patterns: Braided, Meandering and straight. U.S Government Printing Office. Washington D.C. USA. 12 p.
2-      Zhang, Y. Jia, Y. and S.Y. Wang. 2007. A Conservative Multi- block Algorithm for 2Dimensional Numerical Model. Journal of Mathematics Science. 1 (1): 33-45.
3-      Jia Y. Zhang Y. Wang S. and A. Raible. 2006. Numerical Simulations of channel Response to river in Structures in Arkansas river , The 7th Int. Conf. on Hydroscience and Engineering (ICHE-2006), Sep. 10 – Sep. 13, Philadelphia, USA.
4-      Martin-Vide, J. P. M. Roca and C. A. Alvarado. 2012. Bend scour protection using riprap. Water Management 163(2):489-497
5-      Gholizadeh, J. Zahiri A. Dehghan R and Ahmad A. 2011. A quasi-two-dimensional simulation of flood flows in rivers (Case Study: Gorgan river Aqqala station), Journal of soil and water conservation, Volume 19, Issue 4, Gorgan University of Agriculture and Natural Resources.[persian]
6-      Duan J. G. L. He X. Fu and Q. Wang. 2009. Mean flow and turbulence around experimental spur dike. Adv Water Resour. 32(12): 1717-1725
7-      Wu W. 2009. CCHE2D Sediment Transport Model (Version 2.1). Tech Report No. NCCHETR- 2001-3, NCCHE, University of Mississippi, USA, P: 12.
8-      Zhang Y. and Y.F. Jia. 2009. CCHE-MESH: 2D Structured Mesh Generator User’s Manual -Version 3.x, Technical Report No. NCCHE-TR-2009-01, Mississippi University, MS 38677.
9-      Vaghefi M and Radan P. 2014. Numerical study scour and stream flow pattern in an arc of 90 degrees with a T-shaped breakwater with changes in the radius of curvature of the arch. Journal of Water Resources. 7 (23): 37-51. [persian]
10-  Vaghefi M. Zerh poosh shirazi H and Akbari M. 2013. Numerical study of the influence of the radius of curvature on the flow patterns around Srspry submerged breakwater. Journal of irrigation and water systems. 5 (18): 145-156. [persian]
11-  Xiufang Z. Pingyi W. and Y. Chengyu. 2015. Experimental study on flow turbulence distribution around a spur dike with different structure. Journal of Procedia Engineering 28: 772-775.
12-  Hao, Z. Hajime, N. kenji, K. and B. Yasyuki. 2014. Experiment and simulation of turbulent flow in local scour around a spur dyke. Journal of Sediment Research 24: 33-45.
13-  Kooecielniak J. 2007. The Influence of River Training on Mountion channel changes (corpathian Mountions). Geomorphology.
14-  Wu B. Wang G. Ma J. and R. Zhang. 2005. Case study: River Training and Its Effects Fluvial Processes in the Lower Yellow River, China. J. Hydraul. Eng. ASEC, 135 (2), 85-96.
15-  Lazaridou P. l. Daniil E. I. Michas, S. N. Papanicolaou, P. N. and L. S. Lazarides. 2004. Intergrated Environmented and Hydaulic Design of Xerias River, Corinthos, Greece, Training Works. Water.Air. Soil. Poll. 4, 319-330.
16-  Andrzez S. Maciej W. Mateusz S. and K. Krzysztof. 2013. Cross-Section Changes in the Lower Part of a Mountain River After the Flood in Spring 2010, as Presented by Means of CCHE2D Program. Journal of Experimental Methods in Hydraulic Research. 1:287-297.
17-  Jia y. and s.s.y. wang. 1999. Numerical model for channel and morphological change studies, ASCE, Journal of Hydraulic Engineering, Vol.125, No.9, pp 924-933.
Iranian journal of Ecohydrology
Volume 4, Issue 2
June 2017
Pages 615-626

Files

History

  • Receive Date: 16 January 2017
  • Revise Date: 16 April 2017
  • Accept Date: 15 March 2017

Share

How to cite

Statistics