UNDERWATER SEDIMENT THICKNESS MEASURING DEVICE

PROBLEM TO BE SOLVED: To provide a device capable of automatically measuring the thickness of deposited sediment when the thickness is difficult to measure directly manually at the time of a flood or the like. SOLUTION: A metallic box 2 with metallic eaves 2' at the upper end is generated, and a rubber membrane 1 with a proper size and thickness is fixed on it with a metallic frame 3 and many screws 4. A pressure sensor insertion hole 6' is provided on the side face of the metallic box 2, and a pressure sensor 6 inserted from here is fixed with a rubber packing 5 or the like. A valve 7 is opened on the ground, water is filled into the metallic box 2 while the air in the metallic box 2 is completely removed, then the valve 7 is closed. The pressure applied to the rubber membrane on the metallic box 2 can be detected by the pressure sensor 6. This measuring device is installed on a riverbed or the like, and the sum of the soil pressure of sediment and water pressure applied to the upper face is detected.