EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Coupling model of ecohydrology and simulation of typical shrub ecosystems on the Loess Plateau

Yu Zhang1, Xiaoyan Li2,3, Wei Li4, Weiwei Fang5, and Fangzhong Shi2,3
Yu Zhang et al.
  • 1Hebei Normal University, College of Resource and Environmental Sciences, China (
  • 2State Key Laboratory of Earth Surface Processes and Resource Ecology (ESPRE), Beijing Normal University, Beijing 100875, China
  • 3School of Natural Resources, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China
  • 4School of Land Resources & Urban and Rural Planning, Hebei GEO University, Shijiazhuang 050031, China
  • 5State Key Laboratory of Urban and Regional Ecology, Research Center for Eco‐ Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

Shrub is the main vegetation type for vegetation restoration in the Loess Plateau, which plays an important role in the regional ecosystem restoration. Study on the relationships between vegetation and soil water of typical shrub ecosystems are significant for the restoration and reconstruction of ecosystems in the Loess Plateau. Three typical shrub (Hippophae rhamnoides Linn., Spiraea pubescens Turcz., and Caragana korshinskii Kom.) ecosystems were chosen in the Loess Plateau. Field experiments were conducted to investigate the factors that influencing the processes of rainfall interception and root uptake of typical shrubs. S-Biome-BGC model was established based on the Biome-BGC model by developing the rainfall interception and soil water movement sub-models. The model was calibrated and verified using field data. The calibrated S-Biome-BGC model was used to simulate the characteristics of leaf area index (LAI), net primary productivity (NPP), soil water content and the interactions among them for the shrub ecosystems along the precipitation gradients in the Loess Plateau, respectively. The results showed that the predictions of the S-Biome-BGC model for soil water content and LAI of typical shrub ecosystems in Loess Plateau were significantly more accurate than that of Biome-BGC model. The simulated RMSE of soil water content decreased from 0.040~0.130 cm3 cm-3 to 0.026~0.035 cm3 cm-3, and the simulated RMSE of LAI decreased from 0.37~0.70 m2 m-2 to 0.35~0.37 m2 m-2. Therefore, the S-Biome-BGC model can reflect the interaction between plant growth and soil water content in the shrub ecosystems of the Loess Plateau. The S-Biome-BGC model simulation for LAI, NPP and soil water content of the three typical shrubs were significantly different along the precipitation gradients, and increased with annual precipitation together. However, different LAI, NPP and soil water correlations were found under different precipitation gradients. LAI and NPP have significant positive correlations with soil water content in the areas where the annual precipitation is above 460~500 mm that could afford the shrubs growth. The results of the study provide a re-vegetation threshold to guide future re-vegetation activities in the Loess Plateau.

How to cite: Zhang, Y., Li, X., Li, W., Fang, W., and Shi, F.: Coupling model of ecohydrology and simulation of typical shrub ecosystems on the Loess Plateau, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-4423,, 2020