Experimental investigation into effects of material and energy regulation of debris flow by using check dams with different porosities DOI Creative Commons
Jinyan Huang, Xingrong Liu,

Zuoxiong Zhang

et al.

Frontiers in Earth Science, Journal Year: 2024, Volume and Issue: 12

Published: Dec. 9, 2024

The design of check dam openings for debris flow control has been identified as a longstanding challenge, with no definitive solution yet identified. In this study, quantitative analysis the efficacy dams varying opening rates is presented. Field investigation data 67 located in Wenxian County, Gansu Province, were utilized to gain preliminary understanding their running state and damage situation. Building upon this, five ranging from 2.1% 10.4% designed subjected testing. Parameters including volumetric water content, pore pressure, deposit morphology, particle size distribution analyzed investigate effect on control. results showed that: 1) As rate increased, peaks content pressure behind first decreased then stabilized. When was increased 6.3% or higher, these parameters reached stable values. 2) Check different all demonstrated good effects retaining coarse sluicing fine, resulting average coarsened by 2.65 times. This coarsening primarily attributed an increase proportion retained particles within 2–5 mm range. 3) An optimal range 4.2%–6.3% effective Compared other dams, Dam II 4.2% exhibited superior performance mitigating energy intercepting particles, but it imposed stringent strength-related requirements.

Language: Английский

Landslide Susceptibility Mapping Based on Ensemble Learning in the Jiuzhaigou Region, Sichuan, China DOI Creative Commons

Bangsheng An,

Zhijie Zhang,

Shenqing Xiong

et al.

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(22), P. 4218 - 4218

Published: Nov. 12, 2024

Accurate landslide susceptibility mapping is vital for disaster forecasting and risk management. To address the problem of limited accuracy individual classifiers lack model interpretability in machine learning-based models, a coupled multi-model framework proposed. Using Jiuzhaigou County, Sichuan Province, as case study, we developed an evaluation index system incorporating 14 factors. We employed three base models—logistic regression, support vector machine, Gaussian Naive Bayes—assessed through four ensemble methods: Stacking, Voting, Bagging, Boosting. The decision mechanisms these models were explained via SHAP (SHapley Additive exPlanations) analysis. Results demonstrate that integrating learning with yields more reliable enhances interpretability. This approach effectively addresses challenges unreliable complex environments.

Language: Английский

Citations

0
Probability Analysis of Shallow Landslides in Varying Vegetation Zones with Random Soil Grain-Size Distribution DOI
Hu Jiang, Qiang Zou, Yong Li

et al.

Environmental Modelling & Software, Journal Year: 2024, Volume and Issue: unknown, P. 106267 - 106267

Published: Nov. 1, 2024

Language: Английский

Citations

0
Research on the stability of loess landslides under seismic action based on simplified bishop method DOI Creative Commons

Guirang Hu,

Bin Li, Xiaobing Yan

et al.

Frontiers in Earth Science, Journal Year: 2024, Volume and Issue: 12

Published: Nov. 27, 2024

Assessing the stability of loess landslides under seismic action scientifically and reasonably is crucial for reducing earthquake disasters ensuring safety people’s lives property. To study this issue, we chose southern part Fushan County, Shanxi Province as research area, where slopes develop impacts are strong. Based on high-precision DEM images area obtained from unmanned aerial vehicle photogrammetry, selected 32 representative profiles by sampling according to our principles, used simplified Bishop method popular in engineering modeling calculation evaluate entire area. The results were then statistically analyzed, impact range evaluated means graphical form. show that value slope coefficient (Fs) mostly within a 0.7–1.35 avoidance distance 5–20 m force 0.20 g, mainly determined angle, height, which line with conclusions previous conclusions. In paper make useful attempt quantitative evaluation regional landslides, fact proves approach feasible efficient, it can provide data major construction projects avoid landslide disasters.

Language: Английский

Citations

0
A framework for flood inundation extraction based on microwave and optical remote sensing images DOI Creative Commons
Qizhi Teng,

Lanyang Luo,

Shenshen Li

et al.

Frontiers in Earth Science, Journal Year: 2024, Volume and Issue: 12

Published: Dec. 2, 2024

Introduction Effective monitoring and evaluation of floodwaters are essential for disaster prevention mitigation. The flood inundation range can be obtained by using traditional simulation methods, but these methods still have shortcomings. This work proposes an optimization method methods. Methods study aims to introduce effective solution the rapid accurate extraction areas, emphasizing enhancement speed dynamic throughout event. uses a normalized difference water index (NDWI), refined threshold method, filtering process microwave (radar) images. Sentinel-1 SAR (Synthetic Aperture Radar) Sentinel-2 MSI (Multi-spectral Image) images served as primary data sources. were preprocessed extract pre-flood bodies, while processed proposed identify post-flood areas. Results application validation this framework demonstrated through case 2020 event in Tongling, Anhui Province. framework’s performance was validated comparison with ground truth data, yielding high kappa accuracies 98% optical 89% Synthetic Radar. findings highlight ability capture high-accuracy changes areas characterize area changes. Discussion contributes field enhancing scope bodies from improving quality remote sensing processing. It offers valuable insights emergency response situational awareness context extreme weather events associated disasters.

Language: Английский

Citations

0
Experimental investigation into effects of material and energy regulation of debris flow by using check dams with different porosities DOI Creative Commons
Jinyan Huang, Xingrong Liu,

Zuoxiong Zhang

et al.

Frontiers in Earth Science, Journal Year: 2024, Volume and Issue: 12

Published: Dec. 9, 2024

The design of check dam openings for debris flow control has been identified as a longstanding challenge, with no definitive solution yet identified. In this study, quantitative analysis the efficacy dams varying opening rates is presented. Field investigation data 67 located in Wenxian County, Gansu Province, were utilized to gain preliminary understanding their running state and damage situation. Building upon this, five ranging from 2.1% 10.4% designed subjected testing. Parameters including volumetric water content, pore pressure, deposit morphology, particle size distribution analyzed investigate effect on control. results showed that: 1) As rate increased, peaks content pressure behind first decreased then stabilized. When was increased 6.3% or higher, these parameters reached stable values. 2) Check different all demonstrated good effects retaining coarse sluicing fine, resulting average coarsened by 2.65 times. This coarsening primarily attributed an increase proportion retained particles within 2–5 mm range. 3) An optimal range 4.2%–6.3% effective Compared other dams, Dam II 4.2% exhibited superior performance mitigating energy intercepting particles, but it imposed stringent strength-related requirements.

Language: Английский

Citations

0