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Estimation of Peak Flow Rates for Small Drainage Areas

Author

Listed:
  • Baoyuan Liu

    (Northwest A&F University
    Beijing Normal University)

  • Daan Wang

    (Beijing Normal University)

  • Suhua Fu

    (Beijing Normal University
    Chinese Academy of Sciences and Ministry of Water Resources)

  • Wenhua Cao

    (The Monitoring Center of Soil and Water Conservation, Ministry of Water Resources)

Abstract

Runoff plots are important for soil loss measurements, and increasing numbers of plots use automatic equipment. To choose equipment with appropriate capacities, the peak flow rate must be known. The peak flow rate is also an important parameter in the modified universal soil loss equation (MUSLE) which calculate the soil loss from upland slope. The available peak flow rate equations are primarily for the watershed scale, not for small drainage areas like runoff plot. This study’s purpose was to derive an equation suitable for the small drainage areas. A total of 149 runoff events on 5 runoff plots were used to develop a peak flow rate equation for the hillslope scale. All plots are located in the Tuanshangou catchment, Zizhou county, Shaanxi province, China. Dimensionless analyses were used to determine the equation form of linear regression analyses. The results revealed that the peak flow rate was significantly correlated with plot area, slope steepness, runoff depth, rainfall depth and the maximum 30-min rainfall intensity. Two equations were developed to estimate peak flow. The model efficiencies of both equations exceeded 0.9. The equations developed in this study represent an important complement to existing peak flow rate equations. These new equations will facilitate the design of soil conservation practices and/or the selection of flow-observation equipment for small drainage areas.

Suggested Citation

  • Baoyuan Liu & Daan Wang & Suhua Fu & Wenhua Cao, 2017. "Estimation of Peak Flow Rates for Small Drainage Areas," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 31(5), pages 1635-1647, March.
    • Handle: RePEc:spr:waterr:v:31:y:2017:i:5:d:10.1007_s11269-017-1604-y
    DOI: 10.1007/s11269-017-1604-y
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