The effect of suspended sediment concentration on the characteristics of a hydraulic jump in a symmetrical trapezoidal channel was studied experimentally and compared with a classic jump. The first test series of the classical jump was performed in a rectangular flume, while the second series was conducted with two different trapezoidal side slopes. In both cases, the tests were conducted under clear water and with different concentrations (4, 8 and 12%) of fine sand of 0.22 mm as suspended sediment. The results of the tests showed that, with an increase in sediment concentration, the jump length ratio and the sequent depth ratio decreased and the energy dissipation increased. The present study considered three different sections (two sections of trapezoidal shape with side slopes of 60° and 75° and one rectangular section). A comparison of the results in flow with Fr₁ = 10 for all three sections for a sediment concentration of 12% with clear water showed that the jump length ratio decreased by 14%, 22% and 18%, the sequent depth ratio decreased by 12%, 21% and 31% and the energy dissipation ratio increased by 9%, 12% and 11%, respectively. Some dimensionless relations for the prediction of jump characteristics were also developed.

中文翻译：

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泥沙浓度对梯形水力跃迁影响的试验研究

实验研究了悬浮泥沙浓度对对称梯形通道水力跃迁特性的影响，并与经典跃迁进行了比较。经典跳跃的第一个测试系列是在矩形水槽中进行的，而第二个测试系列是在两个不同的梯形边坡上进行的。在这两种情况下，测试都是在清澈的水和浓度为0.22 mm的细沙（分别为4％，8％和12％）的悬浮沉淀物中进行的。试验结果表明，随着泥沙浓度的增加，跳跃长度比和后续深度比减小，能量耗散增加。本研究考虑了三个不同的截面（两个截面为60°和75°的梯形截面和一个矩形截面）。 对于三个部分，清澈的水中沉积物浓度为12％时，全部₁ = 10，表明跳跃长度比率分别降低了14％，22％和18％，后续深度比率分别降低了12％，21％和31％，并且能量耗散率分别提高了9％，12％和11％。还建立了一些无量纲关系，用于预测跳跃特性。