一个带有动态安全因子映射的MaxEnt-TRIGRS混合模型,用于在雨量触发的地形中进行增强的碎片流感受性评估
Xinlong Xu1, Yue Qiang2, Li Li1
1Civil Engineering College, Chongqing Three Gorges University, Wanzhou, 404100, Chongqing, China.
Scientific reports
|July 19, 2025
概括
这项研究引入了一种新的混合碎片流感受性模型,该模型结合了统计和物理方法. 综合框架显著提高了预测准确性,并完善了危险区的识别,以更好地减轻灾害.
科学领域:
- 地质科学 地质科学
- 环境科学 环境科学
- 地质技术工程 地质技术工程
背景情况:
- 传统的碎片流感受性模型往往忽略了关键的触发因素和地质技术数据.
- 准确评估碎片流风险对于防止山区灾害至关重要.
- 现有的统计方法可能会高估或低估容易发生危险的地区.
研究的目的:
- 开发和验证一个创新的双驱动框架,将最大 (MaxEnt) 统计模型与TRIGRS物理模型相结合,用于碎片流感受性评估.
- 通过结合降雨引起的斜坡稳定性分析和地缘统计模式,提高碎片流预测的准确性.
- 为区域减灾规划和预警系统提供一个强大的工具.
主要方法:
- 将TRIGRS模型 (模拟降雨透和坡度稳定性) 与MaxEnt统计模型相结合.
- 使用TRIGRS衍生安全因子 (FS < 1) 作为MaxEnt的阳性样本,以及历史碎片流数据和13个环境/地质技术因素.
- 集成的MaxEnt和TRIGRS输出使用GIS中的动态权重,优化统计预测和物理过程模拟之间的平衡.
主要成果:
- 与单独使用MaxEnt相比,混合模型在预测准确度上取得了21%的改善 (AUC = 0.845).
- 易感性地图修正了34.7%的过度预测区域,并将稳定区域扩大了1.8倍.
- 确定了0.55 (MaxEnt) 到0.45 (TRIGRS) 的最佳权重比,该框架在独立验证区域中正确识别了83.6%的历史事件.
结论:
- 结合的统计物理框架有效地将地统计模式与碎片流评估的地力学过程相结合.
- 这种方法比传统方法有了显著的进步,提供了更可靠的易感性地图.
- 该框架直接适用于复杂地形中的碎片流早期预警和区域灾害减轻规划.
相关概念视频
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
102
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
102
Design Example: Creating a Hydraulic Model of a Dam Spillway
310
Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.
310
Applications of GIS: Disaster Management and Emergency Response
155
Geographic Information System (GIS) technology is essential for risk identification, action prioritization, and resource optimization in critical situations like flooding and earthquakes. By integrating spatial and demographic data, GIS provides a comprehensive framework for emergency response.GIS integrates data layers, like rainfall intensity, topography, elevation profiles, and river levels, to model high-risk flood zones. These layers assess areas susceptible to flooding based on their...
155
Typical Model Studies
442
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
442
Design Example: Maintaining Level of an Embankment
128
Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
128
Conservation of Mass in Moving, Nondeforming Control Volume
1.1K
Stormwater detention basins are essential in managing runoff during heavy rainfall, particularly in urban areas where impervious surfaces increase the risk of flooding. Understanding the conservation of mass in these systems allows engineers to optimize basin performance, balancing inflow, outflow, and water storage.
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
1.1K


