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Experimental Investigation of Erosion Downstream Culverts

Author(s): Ibrahim Adil Al-Hafidh; Tahseen A. Gelmiran; Sulaiman Jasim

Linked Author(s): Ibrahim Adil Ibrahim Al-hafidh

Keywords: Culverts; Erosion; Aggregation beds

Abstract: Laboratory experiments were conducted to investigate the erosion phenomenon downstream culverts. Two circular (6 cm) diameter pipes were distributed equally along cross section of (50 cm) rectangular channel to represent the culverts. Five different discharges (2.2, 3.0, 3.75, 4.6,5.5) l/s were released in three sizes of aggregate of diameters (0.325, 0.450 & 0.750) cm downstream bed. The study includes the measurement of maximum erosion depth and length of erosion hole downstream the two culverts. In addition, the shape of erosion hole had studied too. The results show that the discharge increases the erosion depth and hole length. Moreover, mean diameter of bed material increases the erosion hole decrease. As noted, overlap, hole erosion formed nape of the gates with the increase in discharge. Two empirical equations were obtained: one for the estimation of relative erosion depth and the second for the estimation of the relative length of erosion hole.

DOI: https://doi.org/10.3850/IAHR-39WC2521711920221218

Year: 2022

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