前言水资源管理的基本点之一是决定明渠的流量。在灌溉渠道、水处理厂和废水净化厂中,都使用临界水深测流槽来测量流量。最普通的临界水深测流槽是巴歇尔槽。最近研制的一种测流槽叫无喉槽,见图1.它具有以下优点: (一) 在自由流和淹没流时均运行良好; (二) 由于它有水平底板,水头损失小; (三) 设计和制造简单。 Introduction One of the basic points of water resources management is to determine the flow of open channels. In irrigation channels, water treatment plants and wastewater purification plants, critical depths are used to measure flow. The most common critical depth anemometer is the Parshall trough. A newly developed trough called a throatless is shown in Figure 1. It has the following advantages: (i) it performs well both in free flow and in submerged flow; (ii) it has less head loss due to its horizontal floor; Third, the design and manufacture is simple.