实用堰weir with free fall
堰顶厚度δ介于0.67H与2.5H(H为堰上水头)之间的堰。此时水舌形状和过堰流量受堰顶厚度的影响。由于堰顶较厚，水舌下缘与堰顶呈面的接触，水流受堰顶的约束和顶托，在重力作用下自由跌落。堰型有折线型和曲线型两种。前者多用于小型工程，后者多用于大中型工程。
实用堰
- health insurance
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