基于土壤水分指数预警系统的滑坡模式识别与分类方法

IF 3.9 2区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Yulong Zhu, Bonan Wang, Yafen Zhang, Zhiguo Sun
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引用次数: 0

摘要

本文试图实现基于土壤水分指数(SWI)的预警系统(EWS)中边坡失稳/滑坡模式的识别与分类,基于气象数据对边坡失稳规模进行模糊评价。为此,在22种设计降雨条件下,对由火山土和Toyoura砂两种土体组成的均质边坡模型进行了稳定性分析和抗剪强度参数讨论。在8,976个模拟边坡稳定情景中,首次识别出安全系数(FOS)小于1.0的边坡破坏374个。然后对边坡破坏形态的潜在滑移面深度进行了采集和分析。结果表明,基于swi的EWS可以对4种滑坡模式进行识别和分类。随着降雨强度的增大,边坡破坏模式由长期低强度(LL)型降雨时的模式I(滑动)、短期高强度(SH)型降雨时的模式II(屈曲)、模式III(倾倒)、模式IV(破碎)逐渐变化。此外,边坡破坏模式与潜在滑动深度和SWI的相关性很差,而滑坡模式与潜在滑动深度和第二层储水高度(H2)的相关性较强。因此,在基于swi的EWS中,第二层储水高度(H2)可作为评价边坡破坏规模的指标。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Identification and classification method of landslide pattern in the soil water index-based early warning system.

This paper attempts to realize the identification and classification of slope failure/landslide patterns in the early warning system (EWS) based on Soil Water Index (SWI), for fuzzy evaluation of the slope failure scale based on meteorological data. For this purpose, the stability analysis and shear strength parametric discussions of a homogeneous slope model composed of two kinds of soil, i.e., volcanic soil and Toyoura sand, are performed under 22 kinds of designed rainfall conditions. In a total of 8,976 simulated slope stability scenarios, 374 slope failures with a factor of safety (FOS) less than 1.0 for the first time were identified. After that, the depths of the potential slip surface of the slope failure patterns were collected and analyzed. Results indicate that the SWI-based EWS can identify and classify the four landslide patterns. As rainfall intensity rises, the slope failure pattern gradually changes from Pattern I (Sliding) during long-term low-intensity (LL) type rainfall, to Pattern II (Buckling), to Pattern III (Toppling), and finally to Pattern IV (Crumbling) during short-term high-intensity (SH) type rainfall. In addition, the correlation between the slope failure pattern and the potential slip depth and SWI is very poor, but there is a strong correlation between the landslide pattern and the potential slip depth and water storage height (H2) in the second tank layer. Therefore, in the SWI-based EWS, the water storage height (H2) in the second tank layer might be used to evaluate the scale of slope failure.

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来源期刊
Scientific Reports
Scientific Reports Natural Science Disciplines-
CiteScore
7.50
自引率
4.30%
发文量
19567
审稿时长
3.9 months
期刊介绍: We publish original research from all areas of the natural sciences, psychology, medicine and engineering. You can learn more about what we publish by browsing our specific scientific subject areas below or explore Scientific Reports by browsing all articles and collections. Scientific Reports has a 2-year impact factor: 4.380 (2021), and is the 6th most-cited journal in the world, with more than 540,000 citations in 2020 (Clarivate Analytics, 2021). •Engineering Engineering covers all aspects of engineering, technology, and applied science. It plays a crucial role in the development of technologies to address some of the world''s biggest challenges, helping to save lives and improve the way we live. •Physical sciences Physical sciences are those academic disciplines that aim to uncover the underlying laws of nature — often written in the language of mathematics. It is a collective term for areas of study including astronomy, chemistry, materials science and physics. •Earth and environmental sciences Earth and environmental sciences cover all aspects of Earth and planetary science and broadly encompass solid Earth processes, surface and atmospheric dynamics, Earth system history, climate and climate change, marine and freshwater systems, and ecology. It also considers the interactions between humans and these systems. •Biological sciences Biological sciences encompass all the divisions of natural sciences examining various aspects of vital processes. The concept includes anatomy, physiology, cell biology, biochemistry and biophysics, and covers all organisms from microorganisms, animals to plants. •Health sciences The health sciences study health, disease and healthcare. This field of study aims to develop knowledge, interventions and technology for use in healthcare to improve the treatment of patients.
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