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1. Parshall flume 1: Introduction
Parshall flume, also known as Bab flume, is an auxiliary device for measuring open channel flow. The prototype is a Venturi water tank, and the latter experiment was conducted by VM. Cone in Colorado, USA in 1915. In 1922, F.L. Marshall made a fundamental change to Youma Chan and created the now widely used Bacher groove. Subsequent hydraulic experiments were repeated multiple times, resulting in various measuring tanks ranging in size from 1 inch to 50 inches. The name of the Bacher burial trench was given by the American Civil Society in 1929. Afterwards, many countries such as the United Kingdom, Switzerland, Italy, India, Argentina, etc. also proposed various types of design schemes for Venturi water tanks and conducted experiments, but the Bachel tank is still the most popular tank in Venturi water tanks.
2. What is a Bacher groove? The prototype of the Parshall flume is the Venturi flume, which was experimented with by VM. Cone in Colorado, USA in 1915. In 1922, F.L. Marshall made a fundamental change to this and created the now widely used Bachel groove. Afterwards, they engaged in multiple battles and repeated hydraulic experiments, creating various measuring tanks ranging in size from 1 inch to 50 inches. The name Bacher Trough was given by the American Society of Civil Engineers in 1929. Afterwards, many countries such as the United Kingdom, Switzerland, Italy, India, Argentina, etc. also proposed various types of design schemes for Venturi sinks and conducted experiments, but the Bachel sink is still the most popular sink in Venturi sinks. 3. CC linkiEfield
4. What are the characteristics of the Bacher groove and the principle of measuring wa
The prototype of the Parshall flume is the Venturi flume, which was experimented with by VM. Cone in Colorado, USA in 1915.. In 1922, F.L. Marshall made a fundamental change to this and created the now widely used Bachel groove. Subsequent hydraulic experiments were repeated multiple times, resulting in various measuring tanks ranging in size from 1 inch to 50 inches. The name Bacher Trough was given by the American Civil Society in 1929. Afterwards, many countries such as the United Kingdom, Switzerland, Italy, India, Argentina, etc. also proposed various types of design schemes for Venturi water tanks and conducted experiments, but the Bachel tank is still the most popular tank in Venturi water tanks. Overall, the shape of the Bacher trough is complex and complex, which is more expensive than weirs. In order to improve accuracy, it is necessary to accurately measure the dimensions of each part of the trough, which is its disadvantage. However, there are also some advantages that other measuring devices cannot compare to the high-end model, such as low water level loss (about one fourth of the weir), almost no sedimentation of solid substances in the water, low impact on flow velocity, and relatively small impact on the water level on the downstream side. Therefore, it is used to measure the flow rate of other liquids such as agricultural water and industrial water. The Bacher measuring tank consists of three parts: an upstream contraction section, a short straight throat, and a downstream diffusion section. The groove bottom of the contraction section tilts downstream, while the inclination direction of the diffusion section groove bottom is opposite to that of t