This dataset provide the detailed measurements of kinematic parameters (such as debris-flow velocity, depth, and surge discharge) of surge flows from 1961 to 2024, and flow depth measured by ultrasonic sensors and kinematic elements of surge flows from 1999-2001
The debris-flow kinematic parameters were monitored in a straight channel adjacent to the DDFORS . Observation distances ranged from 50 m to 200 m. Flow time between the two sections was measured using a second chronograph. Depth, defined as the surge front height, was determined by referencing cross-sectional marks on the channel banks, representing the vertical distance between the top of the debris-flow surge and the channel surface . Surface width of debris flow was determined by referencing of channel width. Velocity was calculated by dividing the observation distance by the flow time for each surge as it passed through the cross sections. Bulk density of each surge was determined either through sampling weighting or estimation.
During 1999-2001, the flow depth of specific debris-flow surges was simultaneously measured using an Airanger SPL ultrasonic level meter installed directly above the channel with a sampling frequency of 10 Hz . The measurement range extends from 0.3 m to 60 m. The depth value is calculated as the difference between the installation height of the ultrasonic sensors, set at 10 m, and the measured values.
The discharge, volume, sediment concentration, sediment volume, and sediment transport rate of debris-flow surge were determined based on the observational parameters.For detailed calculation methods, please refer to the attached documentation.
The data quality is reliable after manual verification.
This work is licensed under a
Creative
Commons Attribution 4.0 International License.
CSTR:11738.11.NCDC.DDFORS.DB6803.2025
10.12072/ncdc.ddfors.db6803.2025