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借助声学多普勒流速仪(ADV)测量了水槽中的中空有盖、无盖多孔方形人工鱼礁模型在0(°)及45(°)迎流方向时尾流场的流速分布与紊动强度分布,并对鱼礁周边冲刷后的地形进行了精细测量,由试验资料分析可知:无盖鱼礁0(°)布置时,阻流垂向范围沿程增大,局部冲刷宽度、深度最小,且其对水流的阻减强度呈下强上弱的垂线分布,沿程阻减范围达8倍礁长以外。结合水流输沙理论分析可知,鱼礁对水流的阻滞作用,可减弱水流挟沙能力及推移质输沙率,为悬移质及推移质泥沙于礁后沉积提供了有利的动力环境。
The velocity distribution and turbulence of the wake field at 0 (°) and 45 (°) in the flow direction were measured by acoustic Doppler velocimetry (ADV) According to the experimental data, we can see that when the 0 (°) uncapped fish reefs are arranged, the vertical range of the flow resistance increases along the distance, and the local erosion width and depth are the minimum , And its resistance to the flow of water showed a strong weak vertical distribution, along the range of resistance reduction up to 8 times longer than reefs. According to the theoretical analysis of sediment transport, it can be seen that the blocking effect of the reef on the water flow can weaken the sediment carrying capacity and the sediment transport rate, which provides a favorable dynamic environment for sediment transport and sediment transport over the reef.