Datasets, codes and video clips for the laboratory flume tests of granular flow

Datasets, video clips, and codes related to the paper 'Insight into granular flow dynamics relying on basal stress measurements: from experimental flume tests', submitted to the Journal of Geophysical Research: Solid Earth.

The datasets provides the raw and processed data for the laboratory flume tests of granular flow including parameters reflecting the granular flow behavior, basal normal stresses measured by a force plate, and deposit parameters of the  granular flows.

S1_data_granular flow_velocity provides data of the velocity profiles with a 0.1 second time interval, the depth-averaged velocities, the depth-averaged shear rates,  and the solid inertial stresses of the granular flows under different experimental conditions. The original data were calculated through particle image velocimetry (PIV) method. The images for PIV analysis were recorded by a high-speed camera.

S2_data_granular flow_stress provides the raw data of the measured basal normal stresses of the granular flows for all tests. The mean and fluctuating stress components extracted by applying a moving window average filter are also listed in the Table.

S3_data_granular flow_flow depth provides the data of the granular flow depth extracted every 0,02 s through a image processing method based on the high-speed photographs. 

S4_data_granular flow_deposit provides the parameters of the granular flow deposits for all tests including the apparent friction coefficient and equivalent friction coefficient. The deposit parameters were calculated based on the digital surface model (DSM) of deposit, which were obtained through a oblique photogrammetry method.

S5_data_granular flow_density gives the data of the dynamic bulk flow densities of the granular flows under all experimental conditions. The dynamic bulk densities were calculated according to the measured and calculated normal stresses.

The videos of the granular flows under different experimental conditions during their propagation are provided in 'S6_video_granular flow.zip' to show the granular flow behavior and its evolution. S6_video_granular flow includes the side-view of the granular flows under all experimental conditions and front-view of the IMF-223 granular flow . 

S7_codes_data analysis provides the computer codes for the extraction of mean and fluctuating components and the calculation of granular flow depth. The former includes one file for conducting moving average filter. The latter contains four files, which are used for median filter, image erosion, threshold segmentation and floodfill, extracting flow depth.