赤石山脈大井川支流寸又川流域における合流による基盤床河川勾配変化の地形計測
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概要
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The author measured downward gradient changes of rock-floored channels by confluences using ca 10m-resolution DEM in a mountainous region. After statistics of measurements it is clear that the gradients become flatter obviously by tributary confluences especially by near-equivalent confluences in drainage area (flow accumulation). Based on the outcomes of this statistical research he got a hypothesis to be established on profile concavity of rock-floored channels, that is, sediment flux might make rock-floor proportionally be lowered by abrasion.
- 2010-07-25