Journal of Geographical Sciences

, Volume 19, Issue 4, pp 461–470

Slope runoff study in situ using rainfall simulator in mountainous area of North China

  • Jingjie Yu
  • Cong Yang
  • Changming Liu
  • Xianfang Song
  • Shanshan Hu
  • Fadong Li
  • Changyuan Tang
Article

DOI: 10.1007/s11442-009-0461-x

Cite this article as:
Yu, J., Yang, C., Liu, C. et al. J. Geogr. Sci. (2009) 19: 461. doi:10.1007/s11442-009-0461-x

Abstract

Simulated rainfall is a valid tool to examine the runoff generation on the slope. 13 simulated rainfall experiments with different rainfall intensities and durations are completed in a 5 m × 10 m experimental plot in mountainous area of North China. Simultaneously, rainfall, surface runoff, soil-layer flow, mantel-layer flow and soil moisture are monitored respectively. From the results, it is found that the hydrographs in all layers have the characteristics of rapid rise and fall. The recessions of surface flow and soil-layer flow are much faster than that of mantel-layer flow. Surface flow, the main contributor, makes up more than 60% of the total runoff in the study area. It even exceeds 90% in the cases of high intensity rainfall events. Runoff coefficient (ratio of total runoff to rainfall amount) is mainly influenced by rainfall amount, rainfall intensity and antecedent soil moisture, and the relationship can be well expressed by a multiple linear regression function α = 0.002P + 0.182i + 4.88Wa − 0.821. The relation between the rainfall intensity and the lag time of three flows (surface runoff, soil-layer flow and mantel-layer flow) is shown to be exponential. Then, the result also shows that the recession constant is 0.75 for surface runoff, is 0.94 for soil-layer and mantel-layer flow in this area. In this study area, the dominant infiltration excess runoff is simulated by Horton model. About 0.10 mm/min percolation is observed under the condition of different rainfall intensities, therefore the value is regarded as the steady infiltration rate of the study area.

Keywords

simulated rainfall slope plot runoff generation process mountainous area of North China 

Copyright information

© Science in China Press and Springer Berlin Heidelberg 2009

Authors and Affiliations

  • Jingjie Yu
    • 1
  • Cong Yang
    • 2
  • Changming Liu
    • 1
  • Xianfang Song
    • 1
  • Shanshan Hu
    • 1
    • 3
  • Fadong Li
    • 1
    • 4
  • Changyuan Tang
    • 4
  1. 1.Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources ResearchCASBeijingChina
  2. 2.Bureau of Comprehensive DevelopmentMinistry of Water ResourcesBeijingChina
  3. 3.Graduate University of Chinese Academy of SciencesBeijingChina
  4. 4.Chiba UniversityChibaJapan

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