TY  - Data
T1  - Hydro-geomorphic unit hydrograph dataset of catchments across the Tibetan Plateau
A1  - None
DO  - 10.5281/zenodo.7965233 
PY  - 2024
DA  - 2024-03-26
PB  - National Cryosphere Desert Data Center
AB  - Hydrologic and geomorphic processes are intricately linked within the Earth system, jointly characterizing terrestrial hydrological behaviors and biogeochemical cycles across diverse temporal and spatial scales. The Tibetan Plateau provides an ideal setting for investigating the interactions between hydrological and geomorphic processes in a largely pristine natural environment. Nonetheless, the interactions remain largely unknown due to challenging physical conditions and data limitations. This study presents the inaugural version of a hydrogeomorphic dataset encompassing 18,440 catchments across the region. The dataset comprises 18 hydrogeomorphic metrics, particularly along with the width function and width function-based instantaneous unit hydrograph (WFIUH) of each catchment. We find that the peak flow of WFIUH is positively related to slope and curvature but negatively related to catchment area, perimeter, length, and circularity. The relationships of time-to-peak against the hydrogeomorphic metrics are similar to those of peak flow but in an oppositive direction. Catchment concentration time shows a positive relationship with catchment size but a strong negative correlation with catchment slope. The validity of the derived WFIUH has been confirmed by its successful integration into an hourly hydrological model for simulating flash flood events. Uncertainties in the WFIUH can be attributed to the resolution of DEM and the methods employed for calculating flow velocity.
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/4af5f9c2-579b-4045-95ba-a1a3eebd440c
ER  -