| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Research Abstract |
Denudation rates of hillslopes and mountainous watershed were determined by terrestrial cosmogenic nuclides produced by cosmic-ray irradiation onto the Earth's land surfaces. Soil production rates on hillslopes and spatially-averaged denudation rates of watersheds were calculated to 10-1000 g/m2/yr and 100-10000 g/m2/yr, by accelerator mass spectrometry of nuclides in saprolite beneath soil layer and fluvial sediments collected at outlet of the watersheds, respectively. In high-relief steep mountainous terrains, denudation rates exceed soil production rates, implying a significant contribution of bedrock landsliding to denudation and hence landscape evolution.
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