Hydraulic Model Investigation on Stepped Spillway's Plain and Slotted Roller Bucket
In ogee spillway, the released flood water from crest to toe possesses a high amount of kinetic energy causing scour and erosion on the spillway structure. The dam projects normally have a stilling basin as an energy dissipater which has specific energy dissipation limitations. The stepped spillway is a better option to minimize kinetic energy along the chute and safely discharge water in the river domain. The Khadakwasla dam is situated in Pune, Maharashtra (India), and has scouring and erosion issues on the chute of ogee spillway and on the stilling basin. The present study develops a physical hydraulic model for the dam spillway with steps, plain and slotted roller bucket as per IS Code 6934 (1998) and IS Code 7365 (2010). Experiments were performed at heads of 4m (low head) and 6m (high head) on the developed physical models, namely on the plain and slotted roller bucket model for the ogee spillway and the plain and slotted roller bucket model for the stepped spillway. It was found that the plain roller bucket of ogee spillway dissipates 81.26% of energy at the low head, whereas the stepped spillway with slotted roller bucket dissipates the 83.86% of the energy at the high head.
Keywords:stepped spillway, slotted roller bucket, physical hydraulic model, energy dissipation
M. Ashiq, A. Sattar, “Optimization of Energy Dissipation Works for Nai Gaj Dam Project”, World Environmental and Water Resource Congress, Rhode Island, USA, May 16-20, 2010 DOI: https://doi.org/10.1061/41114(371)171
M. R. Chamani, N. Rajaratnam, “Characteristics of skimming flow over stepped spillways”, Journal of Hydraulic Engineering, Vol. 125, No. 4, pp. 361-368, 1999 DOI: https://doi.org/10.1061/(ASCE)0733-9429(1999)125:4(361)
G. C. Christodoulou, “Energy dissipation on stepped spillway”, Journal of Hydraulic Engineering, Vol. 119, No. 5, pp. 644-649, 1993 DOI: https://doi.org/10.1061/(ASCE)0733-9429(1993)119:5(644)
H. Chanson, “Comparison of energy dissipation nappe and skimming flow regime on stepped chutes”, Journal of Hydraulic Research, Vol. 32, No. 2, pp. 213-218, 1994 DOI: https://doi.org/10.1080/00221686.1994.10750036
G. Degoutte, “Skimming flow in stepped spillway, discussion”, Journal of Hydraulic Engineering-ASCE, Vol. 118, No. 1, pp. 111-113, 1992 DOI: https://doi.org/10.1061/(ASCE)0733-9429(1992)118:1(111.2)
N. Rajaratnam, K. Subramanya, “Profile of the hydraulic jump”, Journal of Hydraulic Division, Vol. 94, No. 3, pp. 663-674, 1998
J. G. Chatila, B. R. Jurdi, “Stepped spillway as an energy dissipator”, Canadian Water Resource Journal, Vol. 29, No. 3, pp. 147-158, 2004 DOI: https://doi.org/10.4296/cwrj147
R. M. Sorensen, “Stepped spillway hydraulic model investigation”, Journal of Hydraulic Engineering, Vol. 111, No. 12, pp. 1461-1472, 1985 DOI: https://doi.org/10.1061/(ASCE)0733-9429(1985)111:12(1461)
A. Liaghat, A. Adib, H. R. Gafouri, “Evaluating the effects of dam construction on the morphological changes of downstream meandering rivers (Case study: Karkheh River)”, Engineering, Technology & Applied Science Research ,Vol. 7, No. 2, pp. 1515-1522, 2017 DOI: https://doi.org/10.48084/etasr.969
Y. K. Tung, L. W. Mays, “Optimum design of stilling basins for overflow spillway”, Journal of the Hydraulic Division, Vol. 108, No. 10, pp. 1163-1178, 1982
R. M. Khatsuria, Hydraulics of Spillways and Energy Dissipators, CRC Press, 2004 DOI: https://doi.org/10.1201/9780203996980
S. K. Mazumder, P. L. Patel, “Model Study of a Ski-Jump Type Energy Dissipator”, National Conference on Hydraulics and Water Resources-HYDRO 2001, pp. 425-432, 2001
V. V. Bhosekar, M. R. Bhajantri, B. S. Sunderlal, S. Patnaik, “Limitations of spillway roller bucket”, Water and Energy International, Vol. 69, No. 7, pp. 47-54, 2012
P. B. Nangare, A. S. Kote, “Experimental investigation of an ogee stepped spillway with plain and slotted roller bucket for energy dissipation”, International Journal of Civil Engineering and Technology, Vol. 8, No. 8, pp. 1549-1555, 2017
Bureau of Indian Standards, IS 6934 (1998): Hydraulic Design of High Ogee Overflow Spillways-Recommendations, Bureau of Indian Standards, 1998
C. Chafi, A. Hazzab, A. Seddini, “Study of flow and energy dissipation in stepped spillway”, Jordan Journal of Civil Engineering, Vol. 4, No. 1, pp. 1-11, 2010
L. Peyras, P. Royet, G. Degoutte, “Flow and energy dissipation over stepped gabion weirs”, Journal of Hydraulic Engineering, Vol. 118, No. 5, pp. 707-717, 1992 DOI: https://doi.org/10.1061/(ASCE)0733-9429(1992)118:5(707)
A. H. K. Al-Shukur, S. K. H. Aal-Khalaf, I. M. A. Al-Sharifi, “Study of optimum safe hydraulic design of stepped spillway by physical models”, International Journal of Scientific and Engineering Research, Vol. 5, No. 1, pp. 1356-1365, 2014
Bureau of Indian Standards, IS 7365 (2010): Criteria for Hydraulic Design of Bucket Type Energy Dissipators, Bureau of Indian Standards, 2010
W. H. Hager, L. Damei, “Sill-controlled energy dissipator”, Journal of Hydraulic Research, Vol. 30, No. 2, pp. 165-181, 1992 DOI: https://doi.org/10.1080/00221689209498932
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