›› 2011, Vol. 32 ›› Issue (4): 1255-1261.

• Numerical Analysis • Previous Articles     Next Articles

Numerical simulation of drain on landslide surface under rainfall condition

TIAN Dong-fang，LIU De-fu，ZHENG Hong，WANG Shi-mei   

  1. College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443002, China
  • Received:2010-01-29 Online:2011-04-10 Published:2011-04-29

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Abstract:

The surface drain is one of the widely used measures in landslides control. Based on the coupling model of infiltration and runoff under rainfall, the drain model of surface drain ditch is realized by adjusting the slope gradients of the runoff control equation. The model is easy to understand and program composition. Furthermore, the seepage field, runoff field, the infiltration capacity and infiltration process are simulated for five typical landslides. The results show that when the rainfall intensity is smaller compared to infiltration rate of the soil, the surface drain should be set in front of the more penetrable slope segment to cut off the runoff in the upper and reduce the infiltration capacity; while the rainfall intensity is larger compared to infiltration rate of the soil, the effect of drain is not evident.

Key words: rainfall infiltration, slope surface runoff, drain, numerical simulation, landslide

CLC Number: 

  • O 319.56
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