1) To measure the water level in fl owing water with signifi cant fl uctuations, insert a steel pipe with an inner diameter of approximately 5 cm into the water channel. Drill several holes, each about Φ5 in diameter, on the side of the pipe opposite the fl ow direction to allow water to enter. Secure the cable and junction box at the pipe's outlet.
2) If the water channel experiences large fluctuations or heavy sediment, install a damping device to filter out sediment, mitigate the eff ects of dynamic pressure and waves, and ensure accurate measurements.
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