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Mining area ecological protection: knowledge production from the perspective of planned behavior theory Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2021-01-10 Qinfeng Xing; Gang He
Abstract To assess residents’ knowledge of ecological protection in mining areas, an analytical model following the planned behavior theory was developed. Data from China’s Huainan mining area were collected through a questionnaire survey and statistically analyzed through a structural equation model and a resistance diagnosis. Results showed that the relative importance of behavior perception (0.457)
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Spatial assessment of drought vulnerability using fuzzy-analytical hierarchical process: a case study at the Indian state of Odisha Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2021-01-05 Sunil Saha; Barnali Kundu; Gopal Chandra Paul; Kaustuv Mukherjee; Biswajeet Pradhan; Abhirup Dikshit; Khairul Nizam Abdul Maulud; Abdullah M. Alamri
Abstract Droughts can be regarded as one of the most spatially complex geohazards, causing a severe impact on socio-economic aspects. Preparing a comprehensive drought management plan is necessary to mitigate drought risks, and the first step towards achieving it is the preparation of drought vulnerability map. The present study integrates geospatial methods with Fuzzy-Analytical Hierarchy Process
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A unified moment magnitude earthquake catalog for Northeast India Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2021-01-06 Ranjit Das; Claudio Meneses
Abstract Earthquake-related studies on seismicity and seismic hazard assessment need a homogenous earthquake catalog for the region studied. A homogenous earthquake catalog for Northeast India region was compiled using derived regional and global empirical relationships between different magnitudes and moment magnitude based on an improved error-corrected methodology suggested in the recent literature
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Radiological analysis of the suitability of Erongo granite for building material Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2021-01-06 Sylvanus Ameh Onjefu; Mpingana Laimi Iyambo; James Abah; Sindila Mwiya
Abstract This study measured the natural radioactivity of 226Ra, 232Th and 40K in 20 granite samples obtained from the Erongo Mountain Belt and Usakos Dome of the Erongo region, Namibia. All the samples were analysed using high purity germanium (HPGe) detector after 30-days to allow for secular equilibrium. The average activity concentrations of 226Ra, 232Th and 40K were 39.22 ± 3.79Bqkg−1, 35.76 ± 17
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Cyclone vulnerability assessment of the western coast of Bangladesh Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2021-01-06 Muhammad Al-Amin Hoque; Biswajeet Pradhan; Naser Ahmed; Bayes Ahmed; Abdullah M. Alamri
Abstract Coastal Bangladesh is one of the hotspots of tropical cyclone’s landfall in South Asia. A spatial vulnerability assessment is required to formulate disaster risk reduction strategies. This study develops a comprehensive tropical cyclone vulnerability mapping approach by applying Fuzzy Analytical Hierarchy Process (FAHP) and geospatial techniques and examines the spatial distribution of tropical
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Study on multi-field catastrophe evolution laws of water inrush from concealed karst cave in roadway excavation: a case of Jiyuan coal mine Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2021-01-06 Bo Li; Xianqing Wang; Zijie Liu; Tao Li
Abstract Coal is the major energy source in China. Many coal mines in Southwest China have arranged the excavation roadway system in the Maokou limestone in coal seam floor because of its special hydrogeological conditions. Since karst is widely distributed in Maokou limestone and water-filled karst caves are also developed commonly there, once a strongly water-filled karst cave is exposed during roadway
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Construction solid waste landfills: risk assessment and monitoring by fibre optic sensing technique Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-12-28 Dongsheng Xu; Fengbo Zhu; Borana Lalit; Xiaochun Fan; Qingbing Liu
Abstract The development of underground spaces generates large amounts of construction wastes, which are generally disposed for the landfill outside of the city in China. This study briefly reviewed a landslide tragedy of a CSW landfill in China; Lessons learned from the failure of risk assessment and preventions were discussed, which showed that two challenging strategies are significant for the risk
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Dynamic mechanism of blown sand hazard formation at the Jieqiong section of the Lhasa–Shigatse railway Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-12-28 Shengbo Xie; Jianjun Qu; Yingjun Pang; Kecun Zhang; Chong Wang
Abstract Blown sand hazards at the Jieqiong section of the Lhasa–Shigatse railway are severe, and their formation mechanism is unclear. Moreover, sand prevention and control work cannot be carried out. Therefore, the dynamic mechanism of blown sand at the Jieqiong section of the Lhasa–Shigatse Railway was investigated by field observation, laboratory analysis, and calculation. Results show that the
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Geospatial analysis of September, 2019 floods in the lower gangetic plains of Bihar using multi-temporal satellites and river gauge data Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-12-24 C. M. Bhatt; Amitesh Gupta; Arijit Roy; Prohelika Dalal; Prakash Chauhan
Abstract During late September, 2019 Bihar was struggling with severe flooding problem, which otherwise is marked as a period of flood recession due to withdrawal of south-east monsoons. The present study assess the flood situation using Sentinel-1 SAR images and complements the understanding about the flood event using long term (2000-18) multi-temporal space based flood sensitive proxy indicators
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Spatial–temporal evolution patterns of soil erosion in the Yellow River Basin from 1990 to 2015: impacts of natural factors and land use change Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-12-24 Xiao; Yang; Bing Guo; Yuefeng Lu; Rui Zhang; Dafu Zhang; Xiaoyan Zhen; Shuting Chen; Hongwei Wu; Cuixia Wei; Luoan Yang; Yi Zhang; Wenqian Zang; Xiangzhi Huang; Guangqiang Sun; Zhen Wang
Abstract This study optimized the slope and slope length factor (LS) and crop management factor (P) of the RUSLE model and then introduced the gravity centre model to analyze the spatial–temporal variation patterns of soil erosion in Yellow River Basin from a new perspective. Results showed that: (1) The improved model of RUSLE with optimized factors of LS and P had better applicability in Yellow River
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Investigation and mechanism analysis of disasters under Hokkaido Eastern Iburi earthquake Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-12-22 Hanxu Zhou; Ailan Che; Lanmin Wang; Lin Wang
Abstract An Mw6.6 earthquake occurred at 3a.m. on September 6, 2018, in the eastern part of Iburi, Hokkaido. This earthquake killed 41 people, caused a series of service interruptions in Sapporo city. Soil liquefaction and approximately 6000 landslides were triggered. A field investigation was conducted on liquefaction and typical landslides during September 18 to 24, 2018. The liquefaction disaster
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Integrating multilayer perceptron neural nets with hybrid ensemble classifiers for deforestation probability assessment in Eastern India Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-12-22 Sunil Saha; Gopal Chandra Paul; Biswajeet Pradhan; Khairul Nizam Abdul Maulud; Abdullah M. Alamri
Abstract The rapid expansion of human settlement, agricultural land and roads because of population growth in several regions of the world has contributed to the depletion of forest land. In this study, novel ensemble intelligent approaches using bagging, dagging and rotation forest (RTF) as meta classifiers of multilayer perceptron (MLP) were used to predict spatial deforestation probability (DP)
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Forest fire risk mapping using GIS and remote sensing in two major landscapes of Nepal Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-12-07 Ashok Parajuli; Ambika Prasad Gautam; Sundar Prasad Sharma; Krishna Bahadur Bhujel; Gagan Sharma; Purna Bahadur Thapa; Bhuwan Singh Bist; Shrijana Poudel
Abstract Forest fires have increased at an alarming rate in recent years, with multiple consequences in Nepal's forest ecosystem and landscapes. The research used remote sensing and GIS technology as well as statistical tools for developing forest fires risk models in two major landscapes of Nepal, i.e., Terai Arc Landscape (TAL) and Chitwan Annapurna Landscape (CHAL). A multi-parametric weighted index
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Time-dependent deformation and fracture evolution around underground excavations Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-12-07 Teng-Fei Fu; Tao Xu; P.L.P. Wasantha; Tian-Hong Yang; Yoshitaka Nara; Zhen Heng
Abstract A numerical time-dependent deformation model of rock by incorporating the stress corrosion model into a three-dimensional discrete element code was established to investigate time-dependent deformation and fracture evolution of surrounding rock around underground excavations with circular, inverted U-shaped and rectangular cross-sections. The mesoscale model input parameters were calibrated
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Quantitative assessment of ground deformations for the risk management of petroleum and gas pipelines using radar interferometry Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-12-07 Emil Bayramov; Manfred Buchroithner; Martin Kada
Abstract The primary objective of these studies was to quantitatively assess the ground deformation velocities and rates and their natural and man-made controlling factors as the potential risks along the seismically active 70 km section of buried Baku-Tbilisi-Ceyhan Oil, South Caucasus Gas, Western Route Oil and South Caucasus Pipeline Expansion Gas pipelines in Azerbaijan using Persistent Scatterer
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Strength anisotropy of jointed rock slope considering mining damage: a numerical analysis method Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-12-07 Yuan Chang; Laishan Chang; Fuqiang Ren
Abstract A combination of Hoek–Brown strength criterion and geological strength index (GSI) rock mass classification is a common method to determine rock mass strength. However, the conventional method involving the determination of disturbance coefficient (D) cannot reflect the anisotropic characteristics of strength of jointed rock mass when considering mining damage. A numerical analysis method
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Analysis of the spatiotemporal characteristics of drought disasters in North China during the Ming and Qing dynasties Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-11-25 Shuoben Bi; Shengjie Bi; Changchun Chen; Ying Lu; Athanase Nkunzimana; Yanping Li
Abstract The present study sought to understand the spatiotemporal characteristics, associated with changes in drought disasters during the Ming and Qing Dynasties in North China. The grade sequence of drought disasters at 21 sites for the given period (1470–1912 AD) in North China was studied herein. An ensemble empirical mode decomposition (EEMD) was used to analyze the multiple time-scales towards
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Dynamic and static analysis of a kind of novel J energy-releasing bolts Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-11-19 Xingdong Zhao; Shujing Zhang; Qiankun Zhu; Huaibin Li; Guoju Chen; Pengqiang Zhang
Abstract Energy-absorbing rockbolt is now recognized as an important support element in deep mines around the world. A novel kind of energy-absorbing bolt called J-bolt was developed, which consists of anchoring (damping) module, deformation module, blending module and thread segment. The static pulling loading model and dynamic impact constitutive model of J-bolt were established. The experiment results
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A comparative study on the integrative ability of the analytical hierarchy process, weights of evidence and logistic regression methods with the Flow-R model for landslide susceptibility assessment Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-11-17 Hien Minh Do; Kun Long Yin; Zi Zheng Guo
Abstract The main purpose of the present study is to compare the results of the integrated models, the weights of evidence (WoE), analytical hierarchical process (AHP) and logistic regression (LR) models combine with a Flow-R model for landslide susceptibility assessment in Ha Giang city, Vietnam and the surrounding areas. First, three landslide susceptibility index (LSI) maps were calculated using
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Investigated stress-strain relationships of municipal solid waste incineration bottom ash Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-11-13 Guosheng Xiang; Danqing Song; Zhuo Chen
Abstract To investigate the stress-strain relationship of municipal solid waste incineration bottom ash (MSWIBA), taking MSWIBA samples with a dry density of ρd = 1.5 g/cm3 as examples, a series of consolidated drained triaxial tests were carried out on MSWIBA. The test results showed that the stress-strain relationship of MSWIBA showed an obvious strain softening phenomenon when their curing ages
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Head-cut gully erosion susceptibility modelling based on ensemble Random Forest with oblique decision trees in Fareghan watershed, Iran Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-11-10 Quoc Bao Pham; Kaustuv Mukherjee; Akbar Norouzi; Nguyen Thi Thuy Linh; Saeid Janizadeh; Kourosh Ahmadi; Artemi Cerdà; Thi Ngoc Canh Doan; Duong Tran Anh
Abstract Gully erosion is the most active hydro-geomorphological phenomenon in the continental areas due to the high erosion rates triggered by the gully system. Monitoring and modelling gully development and gully distribution will contribute to understand landforms evolution and risk assessment. The purpose of the current research is to model head-cut gully erosion susceptibility (HCGES) using support
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Ionospheric perturbations initiated due to the forest-fire over Greece as a consequence of lithosphere-atmosphere-ionosphere coupling Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-11-10 S. Priyadarshi; J. Yang; M. Werner; M. Kryza
Abstract A very devastating and long duration wildfire episode occurred in Greece near Athens during 20-25 July 2018. We have investigated particulate matter PM10 and PM2.5; and selected greenhouse gases such as CO2, NO2, SO2, and CH4 which are known to be generated due to the burning of coal, vegetation, and gasoline. There are significant changes in carbon dioxide, methane and carbon monoxide based
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Monitoring of post-fire forest scars in Serbia based on satellite Sentinel-2 data Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-11-09 Olga Brovkina; Marko Stojanović; Slobodan Milanović; Iscander Latypov; Nenad Marković; Emil Cienciala
Abstract This study aims to improving long-term post-fire environment assessment. It proposes a method for monitoring fire impact using Sentinel-2 satellite data by combining spectral and textural features of land cover types inside a post-fire study sites. Specific objectives were to 1) test stability of the burnt area index for Sentinel-2 (BAIS2) for identification of burn in study sites, 2) investigate
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Experimental study on the characteristics of overpressure wave to ventilation facilities during gas explosion and automatic shock relief devices Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-11-04 Kai Wang; Haiqing Hao; Shuguang Jiang; Weiyao Cai; Yuchen Zhang; Ziting Wang
Abstract Ventilation facilities could easily be destroyed by gas explosion in a coal mine and usually lead to the cascade collapse of the entire ventilation system. Altering the ventilation facilities could increase the value of the overpressure peak and the propagation speed of the shock waves. The attenuation law for blast waves in restricted roadway networks was analysed, and calculation models
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Landslide susceptibility assessment in a lesser Himalayan road corridor (India) applying fuzzy AHP technique and earth-observation data Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-10-26 Ujjwal Sur; Prafull Singh; Sansar Raj Meena
Abstract The Kalsi-Chakrata road corridor, located in the Lesser Himalayas, experiences several landslides every year, resulting in a considerable amount of damage to roads, assets, and other infrastructure and even loss of lives. During the monsoon season (June–August), the disruption of routes due to landslide resulted in economic losses and barred villagers from accessing critical and essential
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Seismic hazard assessment of the Shillong Plateau using a probabilistic approach Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-10-22 Olympa Baro; Abhishek Kumar; Alik Ismail-Zadeh
Abstract Seismotectonic processes of the Shillong Plateau (SP) have been influenced by the Himalayan orogeny, the India-Burmese subduction, and the Bengal Basin evolution leading to high seismic activity in the region. With a goal of assessing seismic hazards in the SP and providing a scientific information to engineering and disaster risk management communities, a probabilistic seismic hazard analysis
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Evaluation of multi-GNSS high-rate relative positioning for monitoring dynamic structural movements in the urban environment Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-10-23 Mosbeh R. Kaloop; Cemal O. Yigit; Ahmed El-Mowafy; Mert Bezcioglu; Ahmet A. Dindar; Jong Wan Hu
Abstract Skyscrapers cause both limited sky-view and multipath error when using Global Navigation Satellite System (GNSS) measurements for monitoring structural movements. To reduce multipath errors, cut-off elevation angle can be set to a high value such as 30°−40°. However, in the case of employing high cut-off elevation angles, the use of GPS only may not provide adequate positioning solutions.
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Spatial–temporal change patterns of vegetation coverage in China and its driving mechanisms over the past 20 years based on the concept of geographic division Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-10-23 Guangqiang Sun; Bing Guo; Wenqian Zang; Xiangzhi Huang; Baomin Han; Xiao Yang; Shuting Chen; Cuixia Wei; Hongwei Wu
Abstract Based on the datasets of MODIS NDVI and SPOT VETGETATION NDVI from 1999 to 2018, this study has introduced the gravity centre model and time-lag analysis model to explore the spatial–temporal change patterns of the NDVI in China in different sub-regions and its response to climate factors. Results showed that: (1) In 1999–2018, there was an increasing trend in vegetation coverage in China
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Flood susceptibility mapping using an improved analytic network process with statistical models Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-10-29 Peyman Yariyan; Mohammadtaghi Avand; Rahim Ali Abbaspour; Ali Torabi Haghighi; Romulus Costache; Omid Ghorbanzadeh; Saeid Janizadeh; Thomas Blaschke
Abstract Flooding is a natural disaster that causes considerable damage to different sectors and severely affects economic and social activities. The city of Saqqez in Iran is susceptible to flooding due to its specific environmental characteristics. Therefore, susceptibility and vulnerability mapping are essential for comprehensive management to reduce the harmful effects of flooding. The primary
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Movement laws of overlying strata and prevention measures of dynamic disasters under deep adjacent coal seam group with high gas Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-10-27 Anying Yuan; Pu Wang; Yang Li
Abstract The repeated mining of deep adjacent coal seam group with high gas has great influence on strata behaviours and dynamic disasters in underground mining. In this paper, the movement of overlying strata and gas for bi-level mining are studied, and then the effective methods of prevention and control disasters with consideration to the ‘time-space-strength’ is put forward. The results show that
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Appraisal of seismic noise scenario at national seismological network of India in COVID-19 lockdown situation Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-10-19 Ajeet P. Pandey; A. P. Singh; Brijesh K. Bansal; G. Suresh; Sanjay K. Prajapati
Abstract We evaluated seismic background noise at national network in India using PSD, Fourier spectra, Spectrogram, and HVSR approach, before and during the nationwide lockdown declared due to COVID-19 pandemic. The analyses were performed to understand characteristics of noise wave-field in such unprecedented situation and its effect on site response at the station. SBN in long period (> 20 s), primary
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Application of a multi-hazard risk assessment for local planning Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-10-16 Kyle D. Buck; J. Kevin Summers
Abstract Multi-hazard assessments are increasingly vital to communities as exposures continue to change. Their data can provide a nuanced understanding of hazard interactions and their contribution to risk reduction. In previous work, the Patterns of Risk using an Integrated Spatial Multi-Hazard (PRISM) approach produces composite measures of vulnerability and risk at the county level for this purpose
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Physical mechanism for severe seismic hazard in the 2010 Yushu, China, earthquake (Mw= 6.9): insights from FEM simulations Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-10-14 Shoubiao Zhu; Jie Yuan
Abstract The moderate-size 2010 Yushu earthquake (Mw 6.9) caused severe seismic damage around the source region which is situated on the sparsely populated hinterland of the Tibetan Plateau. But until now the mechanisms have not been well understood. To this end, we constructed the model to simulate the fault spontaneous rupture propagation, in which the realistic fault with a curved bend is imbedded
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A novel per pixel and object-based ensemble approach for flood susceptibility mapping Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-10-14 Thimmaiah Gudiyangada Nachappa; Sansar Raj Meena
Abstract Conducting flood susceptibility assessments is critical for the identification of flood hazard zones and the mitigation of the detrimental impacts of floods in the future through improved flood management measures. The significance of this study is that we create ensemble methods using the per-pixel approaches of frequency ratio (FR), analytical hierarchical process (AHP), and evidence belief
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A data-mining approach towards damage modelling for El Niño events in Peru Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-10-13 Fabio Brill; Silvia Passuni Pineda; Bruno Espichán Cuya; Heidi Kreibich
Abstract Compound natural hazards like El Niño events cause high damage to society, which to manage requires reliable risk assessments. Damage modelling is a prerequisite for quantitative risk estimations, yet many procedures still rely on expert knowledge, and empirical studies investigating damage from compound natural hazards hardly exist. A nationwide building survey in Peru after the El Niño event
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Analytical stochastic analysis of rock wedge stability using a JDRV method considering the residual factor as a random variable Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-10-08 Chao Hu; Danqing Song; Zhuo Chen
Abstract The stability of a rock wedge is one of the main failure models of rock slopes. Although the strength parameters of the discontinuity planes are commonly deemed to be between the peak and residual strengths, the effect of a residual factor on the stability of a rock wedge still has not been considered. This paper presents an analytical stochastic method, considering the residual factor as
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Roof-breaking mechanism and stress-evolution characteristics in partial backfill mining of steeply inclined seams Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-09-30 Hongwei Wang; Yongping Wu; Maofu Liu; Jianqiang Jiao; Shenghu Luo
Abstract Steeply inclined seams buried at dip angles of 35–55° are considered hard-excavated seams in the mining industry. A partial backfilling method based on sub-regional features of surrounding rock deformations and failure and support stability was proposed to realize safe, efficient production, to promote sustainable development of coal mining and disaster prevention in western China. Through
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The variable-mass seepage law of broken porous rock: an experimental study Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-09-29 Yingchao Wang; Fan Chen; XiaoZhao Li; Xin Yin; Yating Lei
Abstract Induced by tunnel excavation, the particles constantly shift in broken porous rock of faults until failure occurs, which provides channels for water inrush. Therefore, it is essential to investigate the particle migration of broken porous rock. Thus, a visual experimental system of particle migration was developed independently. Further study on the mass loss evolution of broken porous rock
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Monitoring analysis of influence of extra-large complex deep foundation pit on adjacent environment: a case study of Zhengzhou City, China Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-09-29 Danqing Song; Zhuo Chen; Lihu Dong; Gaojie Tang; Kelu Zhang; Heng Wang
Abstract Extra-large complex deep foundation pit excavation has an impact on the surrounding environment. The deformation characteristics of deep foundation pits were investigated during excavation, according to the temporal and spatial variations in displacement, using long-term on-site displacement monitoring. The results show that the deformation characteristics of the supporting structure and surrounding
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Quantitative hazard assessment of rockfall and optimization strategy for protection systems of the Huashiya cliff, southwest China Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-09-18 Nan Jiang; Hai-bo Li; Ming-sheng Liu; Jie-yuan Zhang; Jia-wen Zhou
Frequent rockfall events at the Huashiya cliff near the dam site of Jinsha Hydropower Station poses great threats to construction projects along the Jinsha River. In order to protect the construction area, a comprehensive analysis of rockfall hazard was carried out including field survey, numerical simulation, quantitative assessment and mitigation strategy. High resolution Digital Terrain Model (DTM)
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Site-specific geological and geotechnical investigation of a debris landslide along unstable road cut slopes in the Himalayan region, India Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-09-11 C. Prakasam; Aravinth. R; B. Nagarajan; Varinder S. Kanwar
The present research work investigates the slope instability along NH-05 near Jhakri, Himachal Pradesh, India. Initially, field investigation has been conducted to study the slope morphometry and characteristics. The studied landslides trends along NW–SE direction with height 27.26 m from the road surface and at an angle of 63° vertically post failure. Parameters responsible for slope stability such
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A novel remote sensing detection method for buildings damaged by earthquake based on multiscale adaptive multiple feature fusion Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-09-11 Rui Zhang; Kaifeng Duan; Shucheng You; Futao Wang; Shen Tan
The rapid and accurate detection of damaged buildings after an earthquake are critical for emergency response. Given the difference in the textures of damaged parts and those of the original buildings, damaged buildings can be accurately detected through textural heterogeneity. However, quantitatively detecting damaged buildings using such heterogeneity from post-earthquake images is difficult. Therefore
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Internetworking flood disaster mitigation system based on remote sensing and mobile GIS Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-09-10 Supattra Puttinaovarat; Paramate Horkaew
Flood verification and mitigation based on ground survey has been impeded by many factors. For instance, damage assessment exclusively by onsite expedition could be delayed by restricted access, especially during heavy flooding. To devise appropriate mitigation measures, resources required to thoroughly investigate the incidents in response to disaster could be overwhelming. Moreover, inadequate equipment
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Analysis of maximum flood records in the arid environment of Saudi Arabia Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-09-09 Hatem A. Ewea; Nassir S. Al-Amri; Amro M. Elfeki
A collection of rainfall data and flood records for ephemeral channels in the Kingdom of Saudi Arabia (KSA) provided a unique opportunity to analyze the extreme records in such arid environment. Data of 3121 records were collected. A regional flood envelope relationships and other envelope curves in similar arid areas were compared with the current study. We found that the envelope of the maximum-recorded
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Case study on debris-flow hazard mitigation at a world natural heritage site, Jiuzhaigou Valley, Western China Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-09-08 Wanyu Zhao; Yong You; Xiaoqing Chen; Jingfeng Liu; Jiangang Chen
The Jiuzhaigou earthquake on 8 August 2017, led to a significant increase in the amount of loose, solid material, which has been a rich source of debris-flow activity. In this paper, a comprehensive debris-flow prevention and control system consisting of stabilization, blocking, and deposition structures is proposed based on the topographic features of the debris-flow gullies in the Jiuzhaigou Valley
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Public reactions to the disaster COVID-19: a comparative study in Italy, Lebanon, Portugal, and Serbia Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-09-07 Adem Öcal; Vladimir M. Cvetković; Hoda Baytiyeh; Fantina Maria Santos Tedim; Miodrag Zečević
A new coronavirus emerged in December 2019 and quickly spread globally, causing unprecedented social, psychological, and economic damage. This study aimed to investigate people’s emotional reactions to the COVID-19 pandemic. The dataset for this study consisted of 2,013 adults (962 males and 1,053 females) in four countries (Italy, Lebanon, Portugal, and Serbia). A snowball sampling technique that
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The middle Huaihe River stability analysis and optimization of hydrological chaos forecasting model Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-09-04 Yu Duan; Guobin Xu; Yanzhao Wang; Defeng Yang
Based on the monthly flow time series data of main hydrological stations in the middle Huaihe River from 1985 to 2015, the river stability of Zhengyangguan–Bengbu and Bengbu–Fushan reaches is scientifically judged by nonequilibrium thermodynamics. The results show that the river pattern is in a stable state, and there is no transformation possible in a short time; the evolution of riverbed tends to
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A new criterion for defining the failure of a fractured rock mass slope based on the strength reduction method Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-09-04 Yuan Wei; Tan Hanhua; Niu Jiandong; Peng Shu; Xue Yanyu; Wang Wei; Sun Xiaoyun
In this study, a stability analysis approach for fractured rock mass slopes is proposed by combining the strength reduction method (SRM) with the undirected graph theory (UGT). First, the original shear strength parameters of all the fractures are divided by the same reduction coefficient to generate new shear strength parameters, which are used for numerical simulations of the fractured rock mass
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Developing a geomorphological instantaneous unit hydrograph (GIUH) using equivalent Horton-Strahler ratios for flash flood predictions in arid regions Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-09-02 Sameer Bamufleh; Abdullah Al-Wagdany; Amro Elfeki; Anis Chaabani
The Horton-Strahler ratios are important to describe the stream network and to identify the hydrologic response of a basin using the GIUH concept. These ratios are often sensitive to the selected threshold area for the extraction of the stream network form digital elevation models (DEM). Researches are seeking to find out the appropriate threshold with no success. Self-similarity approach of the properties
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Geohazards regionalization along highways in Shandong Province, China Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-09-02 Hongzhi Yang; Yue Zhao; Qianfang Cheng
The disturbance of the highway construction to the terrain and the natural environmental factors are the main causes of the geohazards along the highway. We collected geohazards along the highway in Shandong Province and put forward the comprehensive geohazard index to reflect the risk of geohazards along the highway. The index consists of an intensity index describing the development of geohazards
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Permeability characteristics of fractured rock mass: a case study of the Dongjiahe coal mine Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-08-27 Ke Ma; Longjiang Wang; Yilin Peng; Liji Long; Sujian Wang; Tong Chen
The intricate distribution of fractures in rock mass leads to the anisotropy of permeability characteristics of the rock mass, which affects the overall stability of rock mass. Aiming at the water inrush from floor in the deep mining of the Dongjiahe coal mine, the distribution and development law of fractures in coal mine rock mass are determined by combining the acoustic emission information from
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Reliable stability analysis of surrounding rock for super section tunnel based on digital characteristics of joint information Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-08-26 Peng He; Gang Wang; Shangqu Sun; Weiteng Li; Feng Jiang; Chengcheng Zheng
Since all available surrounding rock classification approaches don't consider the size effect of the tunnel excavation span and unfavourable geologic bodies, it’s impossible to evaluate the systematic stability of the surrounding rock by rock mass classification alone. In addition, the evaluation results usually have poor robustness because of the uncertainty of structural information. In this paper
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A widely felt Tremor (ML 3.5) of 12 April 2020 in and around NCT Delhi in the backdrop of prevailing COVID-19 pandemic lockdown: analysis and observations Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-08-26 Ajeet P. Pandey; G. Suresh; A.P. Singh; Anup K. Sutar; Brijesh K. Bansal
An earthquake of small magnitude (ML3.5) occurred on 12 April 2020 near the east district boundary of NCT, Delhi with maximum PGA for the event observed to be 14.13 gals. A few smaller aftershocks also occurred in the area. The estimated fault plane solution of the mainshock suggests normal faulting with some strike slip component. The focal mechanism corroborates with the NE - SW orienting lineaments
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Gully erosion susceptibility mapping (GESM) using machine learning methods optimized by the multi‑collinearity analysis and K-fold cross-validation Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-08-26 Omid Ghorbanzadeh; Hejar Shahabi; Fahimeh Mirchooli; Khalil Valizadeh Kamran; Samsung Lim; Jagannath Aryal; Ben Jarihani; Thomas Blaschke
Gully erosion is a severe form of soil erosion that results in a wide range of environmental problems such as, dams’ sedimentation, destruction of transportation and energy transmission lines, decreasing and losing farmland productivity, and land degradation. The main objective of this study is to accurately map the areas prone to gully erosion, by developing two machine learning (ML) models, namely
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Using the rotation and random forest models of ensemble learning to predict landslide susceptibility Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-08-24 Lingran Zhao; Xueling Wu; Ruiqing Niu; Ying Wang; Kaixiang Zhang
Ensemble learning methods can be used to evaluate landslide susceptibility when combined with remote sensing (RS) and geographic information systems (GIS). In this study, the rotation forest (ROF) and random forest (RF) ensemble learning models were applied to evaluate landslide susceptibility. The experiments selected the factors by analysing the linear relationship between the factors, explored the
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Climatic characteristics of hourly precipitation (1978–2019) in the Poyang Lake Basin, China Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-08-25 Qiong Wu; Mingjin Zhan
This study analyzed the distribution and variation characteristics of hourly precipitation in the Poyang Lake Basin during 1978–2019. Most precipitation in the study area occurred during March–June. Short-duration precipitation events (1–6 h) accounted for 73.6% of the total. The average annual number of precipitation hours in the study area was 1028, 36 of which were heavy precipitation events, and
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Analysis of the spalling process of rock mass around a deep underground ramp based on numerical modeling and in-situ observation Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-08-21 Xingdong Zhao; Huaibin Li; Shujing Zhang
Abstract A comprehensive analysis method based on numerical simulation, displacement monitoring and digital borehole photography was proposed and employed to analyze the spalling characteristics and damage range. A continuous–discontinuous numerical model was set up, and which was calibrated based on field displacement monitoring data from Hongtoushan copper mine, and a developed continuous-discontinuous
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Electrical resistivity of three-phase cracked rock-soil medium and its anisotropic changes caused by crack changes Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-08-19 Tao Xie; Qing Ye; Jun Lu
Abstract Electrical resistivity of sedimentary rock-soil is highly variable and governed mainly by a wide range of properties including resistivities of both solid matrix and fluid, cracks or pores, fluid saturation, and crack fabric (e.g. crack shape and alignment). An anisotropic, three-phase, effective medium resistivity model is proposed in this article to describe the resistivity of cracked rock-soil
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Experimental investigation of blocking and discharge regulation function of window-frame dam in viscous debris flow control Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-08-14 Wenbing Zhou; Jinfeng Liu; Yong You; Hao Sun; Liang Jiao
Abstract The blocking of a window-frame dam and the discharge regulation are both important basic control features for characterizing the regulatory effect of a window-frame dam on debris flow. To better understand the regulatory effect of a window-frame dam on debris flow, physical model tests were carried out to investigate the flow pattern, trapping, and regulating characteristics when debris flow
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Comprehensive risk evaluation of coal spontaneous combustion in goafs based on systems-theoretic accident model and processes Geomat Nat. Hazards Risk (IF 3.333) Pub Date : 2020-08-14 Liang Zhou; Guanglong Dai; Ruxiang Qin; Mingyun Tang; Jinwei Qiu
Abstract The traditional risk evaluation of coal spontaneous combustion in goafs in China is unilateral and inaccurate, which can be attributed to the fact that only the change in coal properties is considered and the external environment of coal is ignored. According to latest research, the factors affecting coal spontaneous combustion in goafs is determined by the systems-theoretic accident model
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