A 2016 incident that resulted in damage to a water storage tank's roof motivated pilot‐scale experiments to be conducted to determine the impact of mesh on tank overflow capacity. A clean mesh installed near the outlet of an overflow system did not reduce the capacity during the weir‐dominated flow regime. Mesh was found to reduce the area available to flow, which was found to lower the achievable capacity through the system. Considering only the head loss or pressure drop associated with the mesh, and not area reduction, resulted in an overestimation of achievable capacity, which could lead to an undersized overflow system. The results and formulas presented will help water utilities ensure that overflow systems with mesh are appropriately sized.

中文翻译：

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了解网格对储罐溢流系统容量的影响。

2016年发生的一次事故导致储水罐顶板损坏，该试验旨在确定网格对水箱溢流容量的影响，因此进行了中试规模的实验。安装在溢流系统出口附近的干净筛网不会在堰坝为主的水流过程中降低流量。发现网格减少了可流动的面积，这降低了通过系统可实现的容量。仅考虑与网格相关的压头损失或压降，而不考虑面积减少，会导致对可实现容量的高估，这可能导致溢出系统尺寸过小。给出的结果和公式将有助于自来水公司确保筛孔尺寸合适的溢流系统。