The effects of rock fragments on hydrologic and hydraulic responses along a slope

Autor: Kou-Chan Hung, Ken'ichirou Kosugi, Takahisa Misuyama, Tim Hau Lee
Rok vydání: 2007
Předmět:
Zdroj: Hydrological Processes. 21:1354-1362
ISSN: 1099-1085
0885-6087
DOI: 10.1002/hyp.6315
Popis: A model describing the three-dimensional matrix flow along a slope with rock fragments or impermeable blocks was developed. The model was combined with modified Picard's iteration to ensure mass conservation in the unsaturated flow. We found that rock fragments obstruct water flow along the slope. The groundwater table must be raised to provide a sufficient pore water pressure gradient to facilitate water flow, but higher pore water pressure may induce slope failure. We also conducted a bench-scale laboratory flume experiment to examine the effects of impermeable blocks on downstream seepage flow. In addition, a numerical experiment was conducted to examine how different arrangements of impermeable blocks affect downstream seepage flow and pore water pressure. This research demonstrated that the hydraulic phenomena were affected when impermeable blocks were present, and pore water pressure increased as the position of impermeable blocks was lowered. Copyright © 2006 John Wiley & Sons, Ltd.
Databáze: OpenAIRE
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