澜沧江中上游流域地貌特征及构造活动性评价方法

doi:10.3799/dqkx.2026.217

澜沧江中上游流域地貌特征及构造活动性评价方法

doi: 10.3799/dqkx.2026.217

1. 四川大学水利水电学院, 成都 610065;
2. 水电水利规划设计总院, 北京 100120

基金项目:

西藏自治区科技计划项目(XZ202402ZD0001)

国家自然科学基金项目(U22A20601)

详细信息

作者简介:
苟佳(2002),女,硕士,从事地质灾害防治和滑坡数值模拟。E-mail:2036814823@qq.com

通讯作者:
张凯,博士,E-mail:zhangkai@creei.cn

中图分类号: P954
计量
- 文章访问数: 45
- HTML全文浏览量: 0
- PDF下载量: 11
- 被引次数: 0
出版历程
- 收稿日期: 2026-03-23
- 网络出版日期: 2026-08-25

Methods for Evaluating the Geomorphological Characteristics and Tectonic Activity of the Middle and Upper Lancang River Basin

1. College of Water Resources and Hydropower, Sichuan University, Chengdu 610065, China;
2. China Renewable Energy Engineering Institute, Beijing 100120, China

摘要

摘要: 澜沧江中上游流域位于青藏高原东南缘的构造缝合带，构造运动活跃，目前对该区域构造活动性的传统研究方法成本高、难度大、周期长。为了实现构造活动性的快速定量化评价，本文利用30m数字高程模型，计算并分析了面积高程积分（HI）、归一化河流陡峭指数(k_sn)、标准化河长坡降指标（SLK）、流域盆地不对称度（AF）、及流域盆地形状因子（BS）五个构造地貌参数，提出基于模糊综合法的构造活动性分级新方法。结果表明，构造活动性与岩性和降雨相关性差，对比传统分级方法，本文方法减少了人为影响和误差，能更好反映地貌参数与构造强度间的变化规律，评价结果与已有测量成果基本一致，具有适用性、便捷性和准确性，对工程建设及减灾防灾具有重要意义。
- 澜沧江中上游流域 /
- 地貌特征 /
- 相对构造活动性 /
- 青藏高原东南缘
Abstract: The middle and upper reaches of the Lancang River basin are located within the tectonic suture zone along the southeastern margin of China’s Qinghai-Tibet Plateau, where tectonic activity is intense. Traditional studies of tectonic activity in this region are currently costly, challenging, and time-consuming. To enable rapid quantitative assessment of tectonic activity, this study utilizes a 30-meter resolution ALOS digital elevation model to calculate and analyze five tectonic-geomorphological parameters: area height integral (HI), normalized river steepness index (k_sn), standardized length-to-gradient ratio (SLK), basin asymmetry factor (AF), and basin shape factor (BS). A new method for classifying tectonic activity based on the fuzzy comprehensive evaluation method is proposed. The results indicate that lithology shows a weak correlation with tectonic activity, while precipitation exhibits synchrony with tectonic activity. Compared to traditional classification methods, the new method proposed in this study reduces human bias, minimizes dispersion errors, and better reflects the variation patterns between topographic parameters and tectonic intensity. The evaluation results are generally consistent with active fault zones. This method demonstrates applicability, feasibility, and accuracy, and holds significant implications for engineering construction as well as disaster mitigation and prevention.
- Middle and Upper Lancang River Basin /
- Geomorphological Features /
- Relative Tectonic Activity: Southeastern Margin of the Tibetan Plateau /

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