The development of hydraulic jump downstream weirs creates local scour that may affect the overall stability of the structure or even cause complete failure. In this study, an experimental work was carried out to present a new technique using bed water jets installed to the classical smooth apron to present stilling basin with specific characteristics motivated to dissipate the hydraulic jump energy. Five rows of bed water jets were implemented to explore their presence on the energy dissipation efficiency, the hydraulic jump characteristics, and the vertical and longitudinal flow velocity distributions downstream of the weir apron toe under skimming flow regime in stepped back weirs. Three different arrangements of bed water jets were used in addition to the reference case of a non-jetted system. The sum of jets discharge from the three activated rows were constant of 12 Lit/s. The tested total discharges were 120, 150, and 180 Lit/s. Each discharge was examined with three tailwater depths of 20, 25, and 30 cm. Initial Froude numbers ranging from 1.15 to 4.99 were applied under relative jet discharges ranging from 0% to 10% of the total discharge. The results showed that by activating the middle 3 rows, the average hydraulic jump energy dissipation efficiency can be improved by up to 70.8%, and the average jump lengths can be decreased by up to 48% compared to the non-jetted system. Using stepped back weir increased the energy dissipation efficiency and decreased the jump length by about 40% and 31%, respectively compared to 1:2 sloped back weir for similar flow conditions. Finally, possible future research directions were suggested.

下游水跃堰的发展产生局部冲刷，可能影响结构的整体稳定性，甚至导致完全破坏。在这项研究中，进行了一项实验工作，以展示一种新技术，使用安装在经典光滑挡板上的床水射流来呈现具有驱散水跃能量的特定特性的消力池。实施了五排床水射流，以探索它们对能量耗散效率、水跃特性以及在后退堰的撇渣流态下堰板趾下游的垂直和纵向流速分布的存在。除了非喷射系统的参考案例外，还使用了三种不同的床水喷射装置。从三个激活的排排出的射流总和恒定为 12 升/秒。测试的总放电量为 120、150 和 180 升/秒。每次排放都用 20、25 和 30 厘米的三个尾水深度进行检查。在总排放量的 0% 至 10% 的相对射流排放量下应用范围为 1.15 至 4.99 的初始弗劳德数。结果表明，通过激活中间3排，平均水跃能量耗散效率可提高高达70.8%，与非喷射系统相比，平均跃跃长度可减少高达48%。与类似流动条件下的 1:2 倾斜后堰相比，使用阶梯式后堰提高了能量耗散效率并减少了跳跃长度约 40% 和 31%。最后，提出了未来可能的研究方向。