EGU2020-5197, updated on 29 Sep 2021
https://doi.org/10.5194/egusphere-egu2020-5197
EGU General Assembly 2020
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Application of a Coupled Atmospheric and Hydrological Modelling System (AHMS) to the Yellow River Basin, China

Cong Jiang1, Eric J. R. Parteli2, and Yaping Shao1
Cong Jiang et al.
  • 1Institute for Geophysics and Meteorology, University of Cologne, Cologne, Germany (cjiang1@smail.uni-koeln.de, yshao@uni-koeln.de)
  • 2Department of Geosciences, University of Cologne, Cologne, Germany (eric.parteli@uni-koeln.de)

The Yellow River Basin (795,000 km2) in Northern China has been greatly affected by intensive human activity and climate change over the past decades. In this study, a coupled atmospheric and hydrological modelling system is applied to investigating the long-term hydrological cycle and short-term forecasting of hydrological events in the Yellow River Basin. This modelling system (AHMS) combines a hydrological model (HMS) with the Weather Research and Forecast model (WRF) and the Noah land surface scheme (NoahMP-LSM), which has been recently improved to account for topographic influences in the infiltration scheme and to allow for interactions between the unsaturated and saturated zones by applying the Darcy-flux boundary condition. Here, simulations are performed using the offline AHMS mode over the Yellow River Basin by considering a time span of 25 years (1979-2003) and a spatial resolution of 20 km. The NCEP reanalysis dataset and observed precipitation data for the referred period are used as meteorological forcing data. The most important parameters affecting the hydrological process are identified by means of a parametric sensitivity analysis. Specifically, these main parameters are the Manning's roughness coefficient of channel, the soil infiltration capacity and the hydraulic conductivity of riverbed. To calibrate the values of these parameters for the Yellow River Basin, model predictions for daily streamflow are compared with the corresponding observational data at four hydrological gauging stations including Tangnaihe (TNH), Lanzhou (LZ), Toudaoguai (TDG) and Huanyuankou (HYK) on the mainstream of the Yellow River. Quantitative agreement is found between these observations and the simulation results for all stations. The progress achieved in the present work paves the way for a sediment flux model over the Yellow River Basin and demonstrates the good performance of AHMS for long-term hydrological simulations. 

How to cite: Jiang, C., J. R. Parteli, E., and Shao, Y.: Application of a Coupled Atmospheric and Hydrological Modelling System (AHMS) to the Yellow River Basin, China, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-5197, https://doi.org/10.5194/egusphere-egu2020-5197, 2020.