摘要
滑坡时间预测是滑坡灾害防治的重要组成部分,但由于滑坡演化存在不确定性,准确预测滑坡的发生极为困难.Verhulst反函数模型是一种常用的滑坡时间预测模型,但其存在计算起始时刻选择不当会造成监测数据拟合质量差和预测精度低的问题.针对这一不足,提出了一种改进的Verhulst反函数模型(MVIF模型),并进行近实时概率预测分析.结果表明:(1)MVIF模型改善了原模型对计算起始时刻选择苛刻的问题;(2)MVIF模型预测精度较高,在滑坡进入中等加速变形阶段之后可进行可靠的预测;(3)预测滑坡时间与破坏概率结合提供了一种新的滑坡预报准则.该研究可为蠕滑型滑坡的预警预报提供有价值的参考.
Landslide time-of-failure forecast is an essential part of landslide disaster prevention and control.However,due to the uncertainty of the landslide evolution process,it is challenging to forecast the occurrence time of landslide events accurately.The Verhulst inverse-function model is a common landslide time-of-failure forecasting model,but the model suffers from the problems of poor fitting quality and low forecasting accuracy of displacement monitoring data caused by the improper selection of the calculation starting points.To address this deficiency,an improved Verhulst inverse-function model(MVIF model)is proposed and analyzed for near real-time probabilistic forecast.The results show that(1)the MVIF model addresses the problem of harsh selection of the calculation starting points in the original model;(2)the MVIF model has high forecasting accuracy and can make reliable forecasts after the landslide enters the medium accelerating deformation phase;(3)the combination of predicted landslide time and failure probability provides a new forecasting criterion.This study can provide valuable reference for early warning and forecast of creeping landslides.
作者
陈铭熙
陶培捷
周创兵
姜清辉
Chen Mingxi;Tao Peijie;Zhou Chuangbing;Jiang Qinghui(School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;School of Civil Engineering,Wuhan University,Wuhan 430072,China)
出处
《地球科学》
EI
CAS
CSCD
北大核心
2024年第5期1692-1705,共14页
Earth Science
基金
广西科技基地和人才专项项目(No.AD23026111)
广西自然科学基金项目(No.2024GXNSFBA010226)
广西科技重大专项(No.AA23023016)。
关键词
滑坡
滑坡时间预测
Verhulst反函数模型
模型改进
概率分析
预测决策
灾害
landslides
landslide time⁃of⁃failure forecast
Verhulst inverse⁃function model
model modification
probabilistic analysis
forecasting decision
hazards
