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Landslide Susceptibility Mapping Using RBFN-Based Ensemble Machine Learning Models

Computer Modeling in engineering & Sciences 2025年第1期142卷 467-500页

作者： Landslide Susceptibility Mapping Using RBFN-Based Ensemble Machine Learning Models Duc-Dam Nguyen Nguyen Viet Tiep Quynh-Anh Thi Bui Hiep Van Le Indra Prakash Romulus Costache Manish Pandey Binh Thai Pham Faculty of civil engineering University of Transport TechnologyThanh XuanHa Noi100000Vietnam Faculty of Hydraulic engineering Hanoi University of Civil EngineeringHa Noi100000Vietnam DDG(R)Geological Survey of India Gandhinagar382010India Research institute of the University of Bucharest Bucharest050663Romania National institute of hydrology and water Management Bucharest013686Romania Department of civil engineering Transilvania University of BrasovBrasov500152Romania Danube Delta National institute for Research and Development Tulcea820112Romania Marwadi University Research Center(MURC) Marwadi UniversityRajkotGujaratBharat360003India Department of civil engineering Faculty of Engineering&TechnologyMarwadi UniversityRajkotGujaratBharat360003India

This study was aimed to prepare landslide susceptibility maps for the Pithoragarh district in Uttarakhand,India,using advanced ensemble models that combined Radial Basis Function Networks(RBFN)with three ensemble learning techniques:DAGGING(DG),MULTIBOOST(MB),and ADABOOST(AB).This combination resulted in three distinct ensemble models:DG-RBFN,MB-RBFN,and ***,a traditional weighted method,Information Value(IV),and a benchmark machine learning(ML)model,Multilayer Perceptron Neural Network(MLP),were employed for comparison and *** models were developed using ten landslide conditioning factors,which included slope,aspect,elevation,curvature,land cover,geomorphology,overburden depth,lithology,distance to rivers and distance to *** factors were instrumental in predicting the output variable,which was the probability of landslide *** analysis of the models’performance indicated that the DG-RBFN model,with an Area Under ROC Curve(AUC)of 0.931,outperformed the other *** AB-RBFN model achieved an AUC of 0.929,the MB-RBFN model had an AUC of 0.913,and the MLP model recorded an AUC of *** results suggest that the advanced ensemble ML model DG-RBFN was more accurate than traditional statistical model,single MLP model,and other ensemble models in preparing trustworthy landslide susceptibility maps,thereby enhancing land use planning and decision-making.

关键词： Landslide susceptibility map spatial analysis ensemble modelling information values(IV)

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Estimation of future water resources of Xiangjiang River Basin with VIC model under multiple climate scenarios

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water Science and engineering 2017年第2期10卷 87-96页

作者： Guo-qing Wang Jian-yun Zhang Yue-ping Xu Zhen-xin Bao Xin-yue Yang State Key Laboratory of hydrology-water resources and Hydraulic engineering Nanjing Hydraulic Research Institute Research Center for Climate Change Ministry of Water Resources institute of hydrology and water resources Civil EngineeringZhejiang University College of hydrology and water resources Hohai University

Variation trends of water resources in the Xiangjiang River Basin over the coming decades have been investigated using the variable infiltration capacity(VIC) model and 14 general circulation models'(GCMs') projections under the representative concentration pathway(RCP4.5) scenario. Results show that the Xiangjiang River Basin will probably experience temperature rises during the period from 2021 to2050, with precipitation decrease in the 2020 s and increase in the 2030 s. The VIC model performs well for monthly discharge simulations with better performance for hydrometric stations on the main stream of the Xiangjiang River than for tributary catchments. The simulated annual discharges are significantly correlated to the recorded annual discharges for all the eight selected target stations. The Xiangjiang River Basin may experience water shortages induced by climate change. Annual water resources of the Xiangjiang River Basin over the period from 2021 to 2050 are projected to decrease by 2.76% on average within the range from-7.81% to 7.40%. It is essential to consider the potential impact of climate change on water resources in future planning for sustainable utilization of water resources.

关键词： water resources Climate change VIC model Xiangjiang River Basin Climate scenarios Hydrological modeling

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Risk-based water quality decision-making under small data using Bayesian network

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Journal of Central South University 2012年第11期19卷 3215-3224页

作者：张庆庆许月萍田烨张徐杰 institute of hydrology and water resources Civil EngineeringZhejiang University

A knowledge-based network for Section Yidong Bridge,Dongyang River,one tributary of Qiantang River,Zhejiang Province,China,is established in order to model water quality in areas under small ***,based on normal transformation of variables with routine monitoring data and normal assumption of variables without routine monitoring data,a conditional linear Gaussian Bayesian network is constructed.A "two-constraint selection" procedure is proposed to estimate potential parameter values under small *** all potential parameter values,the ones that are most probable are selected as the "representatives".Finally,the risks of pollutant concentration exceeding national water quality standards are calculated and pollution reduction decisions for decision-making reference are *** final results show that conditional linear Gaussian Bayesian network and "two-constraint selection" procedure are very useful in evaluating risks when there is limited data and can help managers to make sound decisions under small data.

关键词： water quality risk pollution reduction decisions Bayesian network conditional linear Gaussian Model small data

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Drought analysis using multi-scale standardized precipitation index in the Han River Basin,China

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Journal of Zhejiang University-Science A(Applied Physics & engineering) 2011年第6期12卷 483-494页

作者： Yue-ping XU Sheng-ji LIN Yan HUANG Qin-qing ZHANG Qi-hua RAN institute of hydrology and water resources Civil Engineering Zhejiang University Hangzhou 310058 China Zhejiang institute of Hydraulics and Estuary Hangzhou 310020 China Bureau of hydrology Changjiang Water Resources Commission Wuhan 430010 China

Regional drought analysis provides useful information for sustainable water resources *** this paper,a standardized precipitation index(SPI) at multiple time scales was used to investigate the spatial patterns and trends of drought in the Han River Basin,one of the largest tributaries of Yangtze River,*** was found that,in terms of drought severity,the upper basin of the Han River is the least,while the growing trend is the most conspicuous;a less conspicuous growing trend can be observed in the middle basin;and there is an insignificant decreasing trend in the lower ***,the impact of drought on the Middle Route of the South-to-North water Transfer Project was investigated,and it is suggested that water intake must be reduced in times of drought,particularly when successive or simultaneous droughts in the upper and middle basins of the Han River Basin *** results can provide substantial information for future water allocation schemes of the South-to-North water Transfer Project.

关键词： Multi-scale standardized precipitation index(SPI) South-to-North water Transfer Project Spatial patterns Mann-Kendal Han River Basin

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Canonical correlation analysis of hydrological response and soil erosion under moving rainfall

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Journal of Zhejiang University-Science A(Applied Physics & engineering) 2013年第5期14卷 353-361页

作者： Qi-hua RAN Zhi-nan SHI Yue-ping XU institute of hydrology and water resources Zhejiang University

The impacts of rainfall direction on the degree of hydrological response to rainfall properties were investigated using comparative rainfall-runoff experiments on a small-scale slope(4 m×1 m),as well as canonical correlation analysis(CCA).The results of the CCA,based on the observed data showed that,under conditions of both upstream and downstream rainfall movements,the hydrological process can be divided into instantaneous and cumulative responses,for which the driving forces are rainfall intensity and total rainfall,and coupling with splash erosion and wash erosion,*** response of peak runoff(Pr)to intensity-dominated rainfall action appeared to be the most significant,and also runoff(R)to rainfall-dominated action,both for upstream-and downstream-moving ***,the responses of sediment erosion in downstream-moving condition were more significant than those in upstream-moving *** study indicated that a CCA between rainfall and hydrological characteristics is effective for further exploring the rainfall-runoff-erosion mechanism under conditions of moving rainfall,especially for the downstream movement condition.

关键词： Moving rainfall Runoff Sediment erosion Canonical correlation analysis(CCA)

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Vadose-zone moisture dynamics under radiation boundary conditions during a drying process

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Journal of Hydrodynamics 2014年第5期26卷 734-744页

作者：韩江波周志芳傅志敏王锦国 School of Earth Sciences and engineering Hohai University State Key Laboratory of hydrology-water resources and Hydraulic engineering Nanjing Hydraulic Research Institute College of hydrology and water resources Hohai University

In order to better understand the soil moisture dynamics during a drying process, a soil column experiment is conducted in the laboratory, followed by the numerical modeling with consideration of the coupled liquid water, water vapor and heat transport in the vadose zone. Results show that there are three distinct subzones above the water table according to the temporally dynamic variation of the water content profiles. Zone 1 sees a decrease in the water contents in the upper profiles （0 m-0.05 m） due to a negative net water flux in this zone where the upward isothermal water vapor flux becomes the main flow mechanism in the soils. Irl contrast, the water content within Zone 2 in the depth ranging from 0.05 m to 0.37 m sees an apparent increase over the, resulting from the positive net thermal water-vapor and isothermal liquid-water fluxes into this layer. Zone 3 （0.37 m-0.65 m） also sees an apparent decrease in the water content since the isothermal liquid water flux carries the liquid water either upward out of this region for vaporization or downward to the water table as a recharge to the groundwater.

关键词： moisture dynamics soil water flux vadose zone soil column experiment soil drying

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Evaluation of TIGGE Daily Accumulated Precipitation Forecasts over the Qu River Basin, China

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Journal of Meteorological Research 2019年第4期33卷 747-764页

作者： Li LIU Chao GAO Qian ZHU Yue-Ping XU institute of hydrology and water resources College of Civil Engineering and ArchitectureZhejiang UniversityHangzhou 310058 School of civil engineering Southeast UniversityNanjing 210096

Quantitative precipitation forecasts(QPFs)provided by three operational global ensemble prediction systems(EPSs)from the THORPEX(The Observing System Research and Predictability Experiment)Interactive Grand Global Ensemble(TIGGE)archive were evaluated over the Qu River basin,China during the plum rain and typhoon seasons of 2009–*** post-processing methods,the ensemble model output statistics based on censored shifted gamma distribution(CSGD-EMOS)and quantile mapping(QM),were used to reduce bias and to improve the *** results were evaluated by using three incremental precipitation thresholds and multiple verification *** is demonstrated that QPFs from NCEP and ECMWF presented similarly skillful forecasts,although the ECMWF QPFs performed more satisfactorily in the typhoon season and the NCEP QPFs were better in the plum rain *** of the verification metrics showed evident seasonal discriminations,with more satisfactory behavior in the plum rain *** precipitation tended to be overestimated,but heavier precipitation was always *** post-processed QPFs showed a significant improvement from the raw forecasts and the effects of post-processing varied with the lead time,precipitation threshold,and *** was better corrected at longer lead times and higher ***-EMOS was more effective for probabilistic metrics and the root-mean-square *** had a greater effect on removing bias according to bias and categorical metrics,but was unable to warrant *** general,raw forecasts can provide acceptable QPFs eight days in *** post-processing,the useful forecasts can be significantly extended beyond 10 days,showing promising prospects for flood forecasting.

关键词： TIGGE quantitative precipitation forecasts quantile mapping censored shifted gamma distribution

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Verification of A Numerical Harbour Wave Model

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China Ocean engineering 2007年第4期21卷 647-658页

作者：潘军宁洪广文左其华王登婷 State Key Laboratory of hydrology-water resources and Hydraulic engineering Hohai University State Key Laboratory of hydrology-water resources and Hydraulic engineering Nanjing Hydraulic Research Institute

A numerical model for wave propagation in a harbour is verified by use of physical models. The extended time-dependent mild slope equation is employed as the governing equation, and the model is solved by use of ADI method containing the relaxation factor. Firstly, the reflection coefficient of waves in front of rubble-mound breakwaters under oblique incident waves is determined through physical model tests, and it is regarded as the basis for simulating partial reflection boundaries of the numerical model. Then model tests on refraction, diffraction and reflection of waves in a harbour are performed to measure wave height distribution. Comparative results between physical and numerical model tests show that the present numerical model can satisfactorily simulate the propagation of regular and irregular waves in a harbour with complex topography and boundary conditions.

关键词： wave mild slope equation numerical model harbour verification

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Analytical solution for slope instability assessment considering impact of confined aquifer

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Journal of Central South University 2015年第4期22卷 1502-1509页

作者：冉启华钱群王光谦傅旭东苏丹阳 institute of hydrology and water resources Zhejiang University State Key Laboratory of Hydroscience and engineering Tsinghua University

An analytical approach was presented for estimating the factor of safety(FS) for slope failure, with consideration of the impact of a confined aquifer. An upward-moving wetting front from the confined water was assumed and the pore water pressure distribution was then estimated and used to obtain the analytical expression of FS. Then, the validation of the theoretical analysis was applied based on an actual case in Hong Kong. It is shown that the presence of a confined aquifer leads to a lower FS value, and the impact rate of hydrostatic pressure on FS increases as the confined water pressure increases, approaching to a maximum value determined by the ratio of water density to saturated soil density. It is also presented that the contribution of hydrostatic pressure and hydrodynamic pressure to the slope stability vary with the confined aquifer pressure.

关键词： confined/artesian groundwater slope stability factor of safety analytical approach

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Identifying soil structure along headwater hillslopes using ground penetrating radar based technique

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Journal of Mountain Science 2016年第3期13卷 405-415页

作者： HAN Xiao-le LIU Jin-tao ZHANG Jun ZHANG Zhi-cai State Key Laboratory of hydrology-water resources and Hydraulic engineering Hohai University Department of College of hydrology and water resources Hohai University institute of Geochemistry Chinese Academy of Sciences

Soil structure plays an important role in understanding soil attributes as well as hydrological processes. Effective method to obtain high quality soil map is therefore important for both soil science research and soil work ability improvement. However,traditional method such as digging soil pits is destructive and time-consuming. In this study, the structure of headwater hillslopes from Hemuqiao catchment(Taihu Basin, China) have been analyzed both by indirect(ground penetrating radar, GPR) and direct(excavation or soil auger) methods. Four transects at different locations of hillslopes in the catchment were selected for GPR survey. Three of them(#1, #2, and #3) were excavated to obtain fullscale soil information for interpreting radar *** found that the most distinct boundary that can be detected by GPR is the boundary between soil and underlain bedrock. In some cases(e.g., 8-17 m in transect #2), in which the in situ soil was scarcely affected by colluvial process, different soil layers can be identified. This identification process utilized the sensitive of GPR to capture abrupt changes of soil characteristics in layer boundaries, e.g., surface organic layer(layer #1) and bamboo roots layer(layer#2, contain stone fragments), illuvial deposits layer(layer #3) and regolith layer(layer #4). However, in areas where stone fragments were irregularly distributed in the soil profile(highly affected bycolluvial and/or fluvial process), it was possible to distinguish which part contains more stone fragments in soil profile on the basis of reflection density(transect #3). Transect #4(unexcavated) was used to justify the GPR method for soil survey based on experiences from former transects. After that, O horizon thickness was compared by a hand *** work has demonstrated that GPR images can be of a potential data source for hydrological predictions.

关键词： Ground Penetrating Radar(GPR) Hillslope Soil structure

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