Cigana J, Lefebvre G, Marche C
North American Technology Center/USFilter, Ville St-Laurent, Canada.
Water Sci Technol. 2001;44(2-3):287-93.
Although the efficiency of underflow baffles has never been clearly proven, these underflow baffles have gained in popularity over the last few years as a viable means to intercept floatables in Combined Sewer Overflows (CSOs). These pilot scale essays, performed in a 17.0 metres basin at various flowrates, show that a critical horizontal velocity (V(CR)) may develop in the overflow chamber. Whenever this critical velocity is exceeded, floatables that would normally rise to the surface are kept within the flow and never intercepted, thus rendering the underflow baffle ineffective. The equation relating the critical horizontal velocity to the vertical velocity is found to be: V(CR) = 16 w R(H) 1/6.
尽管底流挡板的效率从未得到明确证明，但在过去几年中，这些底流挡板作为截流合流制排水系统溢流（CSO）中漂浮物的一种可行手段，越来越受欢迎。这些在17.0米长的水池中以不同流量进行的中试规模试验表明，溢流室中可能会出现临界水平速度（V(CR)）。每当超过这个临界速度时，通常会上升到水面的漂浮物就会留在水流中，永远不会被截留，从而使底流挡板失效。发现将临界水平速度与垂直速度相关联的方程为：V(CR) = 16 w R(H) 1/6 。
