Flood flow meter | Intelligent solution for river management

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What is the flow calculation for arch dam flooding?

(1) Intersection method of wave flow and weir flow;

(2) Saint Venants formula: Om 8 BH2=27 Vg (3) Shockleys formula: Om=0.9 [H/(H-0.827)] BH3/2

(4) American Watercourse Test Station formula: gm 27V8 (B/b) 02b1 ÷ 28=For local material dams, gradually breaking sails. Laugh: Yellow Silver Containing Committees formula: Om=0.29

6. There are many calculation formulas for g B 4. bmH5bmbm=KoABAH2, and the corresponding calculation method should be determined according to the calculation conditions.

2. Main principles and installation precautions of radar flowmeter

Radar flowmeter is mainly based on planar microwave radar technology, which measures water flow velocity and water level through non-contact methods, and then calculates real-time cross-sectional flow and cumulative flow through built-in algorithms.

. Its core components are radar flowmeter and radar water level gauge. By measuring surface velocity and water level and combining them with cross-sectional information, the final result is obtained using the formula "flow rate=average velocity x cross-sectional area x correction factor". Detailed explanation of working principle for flow velocity measurement: The radar flowmeter collects fluid surface flow velocity data by emitting 24GHz microwave signals, and calculates the average flow velocity of the water crossing section through a model. When it shines on the water surface, it forms an elliptical area, and it is necessary to avoid interfering objects such as branches from entering the beam range and clearing the space. Water level measurement: The radar water level gauge uses an antenna with a beam angle o Flood flowmeter

f 11 × 11 °, which forms a circular area when illuminating the water surface. By using electromagnetic wave ranging technology, accurate information such as distance and orientation from the water surface to the emission point can be obtained, with an accuracy of up to millimeters. It has strong anti-interference ability and is not affected by water surface fluctuations or floating objects. Flow calculation: Combining the average flow velocity of the flowmeter, the water level data of the water level gauge, and the preset section information, the flow section area is calculated through an algorithm, and a correction factor (calibrated according to the actual environment) is introduced to obtain the final flow value. Technological advantages and environmental adaptability: 24GHz microwave technology is not affected by temperature gradients, pressure, air density, wind, sewage corrosion, or sediment, and can work stably 24/7. Multi parameter output: It can provide data such as flow rate, water level, and flow rate simultaneously, meeting the needs of complex scenarios. Reliability and Maintenance: IP68 protection level, lightning protection and reverse connection design, supports low-power operation, and comes with a built-in water level filtering algorithm to ensure data stability. Installation precautions: The scope of use and inspection should be within the range of water level observation. Regularly check the operating status of the instrument to ensure accurate display time. Prohibited from use during freezing or flowing ice periods to avoid equipment damage or data distortion. The comparison and calibration of daily fixed time comparison and measurement data, the frequency needs to be increased in gale, rainstorm or

Flood flow meter | Intelligent solution for river management

What is the flow calculation for arch dam flooding?

2. Main principles and installation precautions of radar flowmeter

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