2025 Volume 81 Issue 16 Article ID: 24-16152
Recent climate changes have resulted in frequent and extensive flooding in Japan, increasing the need for watershed-based flood management. Basic information, including the flow data of tributaries and waterways, is required for the introduction of such flood management; however, little data has been obtained accordingly thus far. In this study, a slit-type pitot tube velocity meter was developed considering a flow-velocity measurement method using the proposed afflux height, and its performance in the field was examined. As a result, the developed velocity meter can observe the flow velocity with high accuracy. The continuous flow velocity data obtained from the installation in the channel presented a good responsive relationship with the rainfall waveform, indicating the possibility of inexpensive continuous observation of flow velocity in the field in future.
