| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Research Abstract |
Observations of pore water pressure, soil characteristics and snow density were conducted at a reactive landslide ares in Tsuruoka, Yamagata Prefecture, where the snow lay more than 2 meters deep every winter. Specially designed equipment was used for pore water pressure measurement and water samp;ing in deep wells. Subsurface pressure gauges were also used for pore water pressure recording. Pore water pressure at the depth of slip surface showed changes in a different cause of that at a shallow layer. It may be caused by water flow through cracks and the effect of groundwater drainage works. Water storage by snow layer was estimated up to 1,000 mm. Infiltration prevention works at abandoned paddy field is effective to decrease water charge on a landslide slope .
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