在分析基础上，提出了漫水丁坝坝头床沙起冲流速的计算办法。

Then, the calculating method of initial scour velocity of bed sand around submerged spur dikes is suggested.

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所述管接 头以不可移除的方式耦合到所述进水阀，且配置有较大的近端通路和用于限制补水流速 的较小的远端计量通路。

The adapter is non-removably coupled to the fill valve and is configured with a larger proximal pathway, and a smaller distal metering pathway for restricting the refill flow rate.

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利用三维超声学多普勒流速仪对丁坝坝头附近水流和回流区水流的紊动特性进行了系统的观测和分析，得到了丁坝坝头和回流区的水流特性及紊动动能的分布规律。

Then the turbulence characteristics of the spur dike head and backflow region and the distributions law of flow and turbulence kinetic energy around spur dike are obtained in this paper.

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