» Research Note « Preservation of the Stilling Basin Located Under the Bottom Outlet of the Historical Fariman Dam

Document Type : Technical Note


1 M.Sc. Student, Civil Engineering Department, Semnan University, Semnan, Iran.

2 Associate Professor, Civil Engineering Department, Semnan University, Semnan, Iran.

3 Assistant Professor, Civil Engineering Department, Semnan University, Semnan, Iran.

4 Project Manager, Technical Office, Khorasan Razavi Regional Water Authority, Mashhad, Iran.


Fariman dam is a historical dam located in Fariman City, Khorasan Razavi province, Iran. So far, experimental and field investigations has not been performed on this dam and its hydraulic structures such as stilling basin. Since the safety and preservation of this historical structure is necessary, its hydraulic performance must be evaluated under different design conditions. This dam has a special stilling basin for its bottom outlet structure. In this paper, the performance of the stilling basin is investigated by Flow-3D software. First, the accuracy of the software is demonstrated by an experimental model. Later, the numerical model of the stilling basin is constructed and two characteristics of flow: velocity and Froude number are verified in the stilling basin. It is shown that the the stilling basin did not have a proper performance under the design condition. Therefore, measures for improving its performance are recommended. 


[1]     حسینی سهی، م. و صالحی نیشابوری، ع.ا.، (1388)، شبیه‌سازی عددی جریان در حوضچه آرامش (مطالعه موردی سد تالوار)، مجله تحقیقات منابع آب ایران، سال پنجم، شماره 3، ص.ص. 67-64.
[2]     Ali A. M. and A. M. Negm. )2009(. "Submerged flow characteristics in a pool type stilling basin with multi-end steps", Thirteenth International Water Technology Conference, Hurghada, Egypt.
[3]     Amorim B. J.C.C., Amante R.C.R. and V.D. Barbosa. (2015). "Experimental and numerical modeling of flow in a stilling basin", 36th IAHR World Congress, Haugue, the Netherlands.
[4]     Babaali H., Shamsai A. and H. Vosoughifar. (2015). "Computational modeling of the hydraulic jump in the stilling basin with converged walls using CFD codes", Journal of Arab J Sci Eng., 40:381–395, DOI 10.1007/s13369-014-1466-z.
[5]     Carvalho R.F., Lemos C.M. and C.M. Ramos. (2008). "Numerical computation of the flow in hydraulic jump stilling basins", Journal of Hydraulic Research, 46(5), pp. 739-752.
[6]     Hager W. H. and R. Sinniger, (2015). "Flow characteristics of the hydraulic jump in a stilling basin with an abrupt bottom rise", Journal of Hydraulic Research, 23(2), pp. 101-113.