基于Wit指数的冰川型泥石流的年轮定灾方法

皋子琪; 吕立群; 周冠宇; 黄锋; 马超; 陶正想; 梁锦杭; 王兆印

doi:10.3799/dqkx.2024.011

Volume 50 Issue 2

Feb. 2025

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Article Navigation > Earth Science > 2025 > 50(2): 752-762

Gao Ziqi, Lv Liqun, Zhou Guanyu, Huang Feng, Ma Chao, Tao Zhengxiang, Liang Jinhang, Wang Zhaoyin, 2025. New Reconstruction of Glacier Debris Flows Based on Tree Ring Response. Earth Science, 50(2): 752-762. doi: 10.3799/dqkx.2024.011

Citation:

Gao Ziqi, Lv Liqun, Zhou Guanyu, Huang Feng, Ma Chao, Tao Zhengxiang, Liang Jinhang, Wang Zhaoyin, 2025. New Reconstruction of Glacier Debris Flows Based on Tree Ring Response. Earth Science, 50(2): 752-762. doi: 10.3799/dqkx.2024.011

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New Reconstruction of Glacier Debris Flows Based on Tree Ring Response

doi: 10.3799/dqkx.2024.011

1.
College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
2.
State Key Laboratory of Hydrology and Sediment Science, Tsinghua University, Beijing 100084, China

Received Date: 2024-01-09
Available Online: 2025-02-26
Publish Date: 2025-02-25

Abstract

Abstract

Glacial debris flows occur frequently in the Rangdaqu River Basin, posing a serious threat to local safety. Reconstructing the eruption history, flow range, and causes of debris flows can provide disaster prevention and mitigation parameters for engineering construction. Based on the cambial injury tissue and growth inhibition response of trees, this study provides a new calculation method for the evaluation threshold of growth inhibition in tree rings and the W_it index of debrisflow identification in tree rings, and reconstructs the outbreak time and flow range of debris flows from 1890 to 2021. The results show that: (1) the threshold for growth inhibition in the active zone of glaciers has been revised to 25%; (2) the calculation of the W_it index needs to exclude growth release factors, and the use of traumatic tissue and growth inhibition in tree rings can improve the accuracy of dating debris flow events.
- debris flows,
- glaciers,
- damaged tissue,
- growth inhibition,
- disaster reconstruction,
- engineering geology

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References(40)

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New Reconstruction of Glacier Debris Flows Based on Tree Ring Response

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