A dataset of distributions and characteristics of debris flows in the China-Nepal Traffic Corridor along the 318 National Highway(2022)

The spatial range of the debris flow distribution and characteristics dataset along the 318 National Highway of the China Nepal Transportation Corridor is 28.0 ° N-29.4 ° N and 85.1 ° E-88.9 ° E. The generation process mainly consists of four parts: early identification of debris flows, field investigation and verification, identification of debris flow basins combined with images, and determination of debris flow basin parameters.

The data processing steps include DEM watershed division, precipitation and temperature data processing, geological data processing such as stratigraphic lithology and faults, calibration of debris flow watershed range, and extraction of debris flow watershed parameters. The dataset is mainly based on five types of data: ALOS 12.5m DEM, Google Earth image, geological map (1:500000), annual precipitation (1980-2009), and annual average temperature (1980-2009) for the China Nepal transportation corridor. The dataset of 255 debris flow records consists of three sub-datasets: 1) a vector file that defines the main distribution areas of debris flows in the China-Nepal Traffic Corridor along the 318 National Highway; 2) a vector file of debris flow catalogue; 3) the statistics for each debris flow gully, including such parameters as code, outfall longitude, outfall latitude, watershed area, average elevation, relative elevation difference, maximum slope, average slope, gully bed gradient, lithology classification value, fault density, average annual precipitation, average annual temperature, river network density, etc.