Reconstruction of Past Erosional Force from Tree Ring Information around the Rokko Mountains, Japan
Reconstruction of Past Erosional Force from Tree Ring Information around the Rokko Mountains, Japan
复制标题
根据日本六甲山周围的树木年轮信息重建过去的侵蚀力
DOI：
10.1016/0033-5894(90)90034-i
复制
发表时间：
1990
影响因子：
2.3
通讯作者：
T. Okimura
中科院分区：
文献类型：
--
作者：
K. Kashiwaya;T. Okimura
六甲山脉的暴雨经常引发严重的山体滑坡和泥石流，但在同样的降雨事件中，在山脉以北地区很少发生这种现象。山区降水过剩数据（即过去100年超过100毫米/天的年降雨量总和）25-30年的周期性与山体滑坡和泥石流发生频率的增加有关。对近50 ~ 240 a山区和北部地区树木年轮宽度的分析表明，大部分序列具有25 ~ 30 a的优势周期性，山区年轮序列的周期性比北部地区更为明显。这些结果得出的结论是，在受斜坡运动影响的地区，过量降雨可能提供了侵蚀力的第一个近似值，而树木年轮宽度可以作为侵蚀力的代表。
Torrential rainfalls in the Rokko Mountains have often triggered severe landslides and debris flows, but few such phenomena have occurred in the area just to the north of the mountains during the same rainfall events. The periodicity of 25–30 years in excess rainfall data (i.e., the annual summation of heavy rainfall of more than 100 mm/day during the past 100 years) around the mountains correlates with the increased frequency of landslides and debris flows. Analyses of tree-ring widths that span the past 50–240 years in samples taken from various areas in the mountains and the area just to the north indicate that most sequences have a dominant periodicity of about 25–30 years, the ring series in the mountain areas having a more conspicuous periodicity than those from the area just to the north. These results lead to the conclusion that excess rainfall may provide a first approximation of erosional force in areas affected by slope movement, and that tree-ring width may be used as a proxy for erosional force.