著者

Hiroyuki OBANAWA Yuichi ONDA Hiromu MORIWAKI Yukinori MATSUKURA

出版者

The Association of Japanese Geographers

雑誌

地理学評論 (ISSN:13479555)

巻号頁・発行日

vol.78, no.12, pp.859-866, 2005-10-01 (Released:2008-12-25)

参考文献数

12

---

To examine running distance of debris flows occurring on the talus slopes, rainfall experiments were carried out. The quantity Vt is defined as the reciprocal of the threshold value of Lc/ Lt, at which debris flows just reach the bottom of the talus slope, where Lc is the horizontal length of the cliff and Lt is the horizontal length of the talus slope. The value of Vt is also a measure of the possibility of sedimentary outflow from the talus slope by debris flow. The value of Vt shows strong correlation with the hydraulic conductivity of talus sediment (K) and the rainfall intensity (Ir). The outflow of debris from the talus slope can be predicted using the values of Lc, Lt, K, and Ir.

著者

Yukiya TANAKA Yukinori MATSUKURA

出版者

The Association of Japanese Geographers

雑誌

Geographical review of Japan, Series B (ISSN:02896001)

巻号頁・発行日

vol.72, no.2, pp.173-180, 1999-12-01 (Released:2008-12-25)

参考文献数

64

---

Although many studies of Korean pediments have been carried out and various opinions on the formation of the pediments have been proposed, the origin and formative processes of Korean pediments have not yet been clearly resolved. The present paper calls attention to the importance of making additional efforts to (1) resolve the relationships between periglacial processes and colluvial slope formation, and (2) to examine the formative processes of pediments based on the field or laboratory measurement of rock properties.

著者

Sachi WAKASA Yuri MORIGUCHI Hiroyuki MATSUZAKI Yukinori MATSUKURA

出版者

The Tohoku Geographical Association

雑誌

Kikan Chirigaku (ISSN:09167889)

巻号頁・発行日

vol.60, no.2, pp.69-76, 2008-09-10 (Released:2010-06-22)

参考文献数

18

被引用文献数

2

---

寝覚ノ床は, 木曽川上流域の長野県木曽郡上松町にある露出花歯岩からなる地形である。本研究では, この寝覚ノ床の露出花崗岩表面の露出年代値を宇宙線生成核種10Beの濃度から推定した。また, 岩盤表面の強度をシュミットハンマーとエコーチップにより測定した。その結果, (1) 寝覚ノ床は約1.2万年前に露出したこと, (2) 河床からの比高が高いところほど風化がより進行していることから, 露出後に徐々に進行した下刻作用によって形成されたと考えられた。さらに, 岩盤表面の河床からの高度と露出年代値から得られた岩盤の平均侵食速度 (下刻速度) は, 1.7m/kyrであり, この値は周囲の平均隆起速度と調和的である。