HR: 0800h
AN: H51C-0372 [Abstracts]
TI: The Variation of Pore-water Pressure in the Sidewall of the Gully developed on Mountainous Slope in a
Temperate Climate, South Korea: Preliminary Study
AU: * Kim, J
EM: jkkim@kigam.re.kr
AF: Korea Institute of Geoscience & Mineral Resources(KIGAM), 30 Gajeon-dong, Yuseong-gu, Daejeon, 305-350
Korea, Republic of
AU: Yang, D
EM: ydy@kigam.re.kr
AF: Korea Institute of Geoscience & Mineral Resources(KIGAM), 30 Gajeon-dong, Yuseong-gu, Daejeon, 305-350
Korea, Republic of
AU: Kim, J
EM: kjy@kigam.re.kr
AF: Korea Institute of Geoscience & Mineral Resources(KIGAM), 30 Gajeon-dong, Yuseong-gu, Daejeon, 305-350
Korea, Republic of
AU: Kim, M
EM: varcgisv@hanmail.net
AF: Korea Institute of Geoscience & Mineral Resources(KIGAM), 30 Gajeon-dong, Yuseong-gu, Daejeon, 305-350
Korea, Republic of
AB:
It is critical to monitor slope hydrology in order to apply to evaluate the matters of soil loss and slope stability. Matric
suction in an unsaturated soil, specially, influences the shear strength of the material. Thus, we have firstly monitored to
know the variation of the matric suction on the sidewall of the gully, however the objective to this study is ultimately to
relveal the effect of pore water pressure on the process of the sidewall failure. For most of the monitoring period,
unsaturated hydraulic gradients are downward. The temporal variation in pore-water pressures increase with increasing soil
depth, but the response on the matric suction to rainfall occures mainly the soil at the shallower depth. Moreover, the
variation of pore-water pressures along the soil depth is related with the rainfall intensity, and the latent period of
martic suction as rainfall increase with soil depth. Consequently, compressed air, formed by downward water movement, at
lower part of soil influenced the reduction of reaction velocity along the soil depth.
Keywords: pore-water pressure; vertical and temporal variability; vertical unsaturated flow; slope hydrology.
DE: 0486 Soils/pedology (1865)
DE: 1625 Geomorphology and weathering (0790, 1824, 1825, 1826, 1886)
DE: 1815 Erosion
DE: 1866 Soil moisture
DE: 9320 Asia
SC: Hydrology [H]
MN: Fall Meeting 2005