A Dam Spillway Model Using End Sill

Authors

  • Yogi Pandhu Satriyawan Doctoral Program in Department of Water Resources, Faculty of Engineering, University of Brawijaya, Indonesia
  • Very Dermawan Department of Water Resources, Faculty of Engineering, University of Brawijaya, Indonesia
  • Pitojo Tri Juwono Department of Water Resources, Faculty of Engineering, University of Brawijaya, Indonesia https://orcid.org/0009-0009-1907-840X
  • Dian Sisinggih Department of Water Resources, Faculty of Engineering, University of Brawijaya, Indonesia https://orcid.org/0000-0003-1656-4938
  • Lily Montarcih Limantara Department of Water Resources, Faculty of Engineering, University of Brawijaya, Indonesia
Volume: 15 | Issue: 5 | Pages: 27834-27843 | October 2025 | https://doi.org/10.48084/etasr.12753

Received: 15 June 2025 | Revised: 15 July 2025 and 3 August 2025 | Accepted: 11 August 2025 | Online: 31 August 2025


Corresponding author: Lily Montarcih Limantara

Abstract

This research focuses on the development of a hydraulic model of energy dissipator with segmented end sill on the dam spillway as a modification of the standard United States Bureau of Reclamation (USBR) Type III design. By using Froude similarity analysis at 1:100 scale and a Froude number range of 13-25, this study compares the performance of the standard design (Configuration A) with a modification by using a two-segment zigzag pattern segmented end sill (Configuration B). The results show that Configuration B achieves a specific energy reduction of up to 15- 23% higher than Configuration A across all tested discharge ranges (9-22 l/s). The segmented end sill causes the increase of turbulence, the expansion of the vortex area, a more even distribution of energy, and then the reduction of the potential damage in the dam downstream. This research provides an efficient and economical design alternative for improving the safety of hydraulic structures in dams with high supercritical flow conditions.

Keywords:

energy dissipator, segmented end sill, dam spillway, Froude number, USBR type III

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How to Cite

[1]
Y. P. Satriyawan, V. Dermawan, P. T. Juwono, D. Sisinggih, and L. M. Limantara, “A Dam Spillway Model Using End Sill”, Eng. Technol. Appl. Sci. Res., vol. 15, no. 5, pp. 27834–27843, Oct. 2025.

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Copyright (c) 2025 Yogi Pandhu Satriyawan, Very Dermawan, Pitojo Tri Juwono, Dian Sisinggih, Lily Montarcih Limantara

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