img

Wechat

Adv search

Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (2): 27-37.DOI: 10.7522/j.issn.1000-694X.2020.00122

Previous Articles     Next Articles

Potential wind erosion simulation in the agro-pastoral ecotone of northern China using RWEQ and WEPS models

Jun Liu1(), Zhongling Guo1(), Chunping Chang1, Rende Wang2, Jifeng Li1, Qing Li2, Xuyang Wang1   

  1. 1.School of Resources and Environmental Sciences,Hebei Normal University,Shijiazhuang 050024,China
    2.Institute of Geographical Sciences,Hebei Academy of Sciences,Shijiazhuang 050021,China
  • Received:2020-09-26 Revised:2020-12-02 Online:2021-03-20 Published:2021-03-26
  • Contact: Zhongling Guo

Abstract:

The agro-pastoral ecotone in northern China, a typical region sensitive to interaction between climate and human beings, has always been undergoing wind erosion and soil degradation. At present, the wind erosion model is one of the most effective methods to obtain the regional potential wind erosion. In this study, the regional versions of Revised Wind Erosion Equation (RWEQ) and Wind Erosion Prediction System (WEPS) were used to evaluate the potential wind erosion at the agro-pastoral ecotone in northern China during 2000-2012. The results demonstrate that the magnitudes of average potential wind erosion were different while the spatial distribution, interannual decreasing trend and seasonal distribution of potential wind erosion were similar between the RWEQ and WEPS. It is found that wind speed, soil moisture and land use change have an impact on soil wind erosion by the analysis of the spatial correlation between wind speed, soil moisture and wind erosion modulus, and the influence of land use change on fluctuation of wind erosion amount. The observed wind erosion data are closely related to the values predicted by RWEQ (R2=0.45, P<0.01) and WEPS (R2=0.57, P<0.01). The Nash (Sutcliffe efficiency coefficient) of WEPS model (NSC=0.54) is higher than that of RWEQ model (NSC=0.27). Both RWEQ model and WEPS model can objectively predict the soil wind erosion of the APEC, and the prediction accuracy of WEPS model is better.

Key words: wind erosion model, soil wind erosion modulus, temporal and spatial distribution, influence factor

CLC Number: