@article{Aksoy_Dogan_2019, title={Experimental investigation of time-dependent local scour downstream of a stepped channel}, volume={45}, url={https://watersa.net/article/view/6738}, DOI={10.17159/wsa/2019.v45.i3.6738}, abstractNote={<p>In this study, temporal variation of local scour occurring at the downstream part of the stepped channel were investigated experimentally. The experimental tests were carried out in a stepped flume with a height of 2.4 m. The width of the rectangular flume was 0.10 m and the length of the stilling basin was 2.12 m. Bed material was placed in a sediment box with a height of 24 cm and length of 2.48 m, without any compaction. Experiments were carried out by using bed material of 4 different grain size distributions, 2 different sill heights and 6 different flow rates. Two empirical equations which include Shields parameter (<em>θ</em>) and densimetric Froude particle number (<em>F<sub>d</sub></em>) were proposed by using the experimental findings to predict the temporal variation of the scour depth. The <em>R</em><sup>2</sup> (coefficient of determination) values were computed for both proposed equations as 0.866 and 0.865. The scatter index (SI) values were also determined and computed as 8.73% and 8.25%. The fit of the equations was also determined by means of Fisher’s test.</p>}, number={3 July}, journal={Water SA}, author={Aksoy, Aysegul Ozgenc and Dogan, Mustafa}, year={2019}, month={Jul.} }