Reconstruct the Activity Years of Jiufangshan Landslide by Means of Tree-Rings
详细信息
- 责任者：Hong Ting (School of Geography Science ; Nanjing Normal University ; Nanjing 210046 ; China) ; Bai Shibiao
- 刊名：Journal of Mountain Science
- 出版年：2012
- 卷期：30(1)
- 关键词：滑坡 ; landslides ; 年轮 ; tree rings ; 甘肃 ; Gansu Province
- 页码：p.57-64
- 图表：7 illus., 2 tables, 17 refs.
- 分类号：1800
- issnNo：ISSN1008-2786
- isbnNo：CN51-1516/P
摘要
The understanding of geomorphic processes and knowledge of past events are important elements for the assessment of natural hazards. With the frequencies of landslides, debris-flows and other geological disaster events increased in recent years, risk management and evaluation of geological disasters received more and more attention. Tree-ring data is widely used in the researches of disasters recovery of the past in recent years. Tree-ring method can precisely determine the time of landslide happened using enough amounts of samples. The study area is Jiufangshan landslide, which is located in Wudu District of south of Gansu Province in Northwest China. The Jiufangshan landslide reactivation periods are analyzed using tree-ring analysis method. The results show that: 1) heavy precipitation, seismic impact and unreasonable irrigation activities may caused the landslide reactivation, while precipitation plays an important role in the landslide reactivation; and 2) the eccentric wood and false rings appeared in the tree-ring samples are evidences of landslide events, these also indicate that the growth environment of trees is changed by the landslide activity.
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