[1]XIAO Deng-pan,HAN Shu-min,YANG Yan-min,et al.Study on Rainfall-Infiltration-Runoff Under Typical Ground Surfaces Conditions in the Hilly Regions of Taihang Mountain[J].Research of Soil and Water Conservation,2009,16(05):35-39.
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Study on Rainfall-Infiltration-Runoff Under Typical Ground Surfaces Conditions in the Hilly Regions of Taihang Mountain
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
16
Number of periods:
2009 05
Page number:
35-39
Column:
Public date:
2009-10-20
- Title:
- Study on Rainfall-Infiltration-Runoff Under Typical Ground Surfaces Conditions in the Hilly Regions of Taihang Mountain
- CLC:
- S157
- DOI:
- -
- Abstract:
- An artificial rainfall experiment was conducted to clarify the characteristics of rainfall-infiltration-runoff under typical ground surfaces conditions in the hilly regions of Taihang Mountain.The results showed that: (1) Characteristics of runoff generation was apparently different for various ground surfaces,which was mainly demonstrated by following results: decreasing slope gradient delayed the time of runoff generation,while vegetation actually postponed the whole runoff process.Increasing vegetation cover and reducing slope gradient significantly reduced runoff volume and rate,and also delayed runoff generation.Under every special ground surface,the rate of surface runoff is logarithmically related with rainfall duration from runoff commencing to stabilization.After an artificial precipitation with an intensity of 0.64mm/min and a duration of 80 minutes,the order of runoff coefficient for different land covers of slope was: bare land>shrubs without a litter layer>grassland>shrubs with a litter layer.Compared with bare land,the later three ground surfaces reduced runoff by 33.7% (8.3mm),49.2% (12.1mm) and 75.2% (18.5mm) respectively.(2) As different land cover and surface litter combinations reduced runoff amount,actually promoted more rainwater infiltrating to the deeper soil layer.Only 6.0% of rainfall infiltrated to the soil below 20cm depth in bare land,which was significantly less than 23.3%～32.5% of rainfall in vegetated conditions.The litter layer underlying shrubs increased 20% of rainwater infiltrated to soil and 8% to the soil below 20cm depth.
- References:
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