نتایج جستجو برای: geological hazards

تعداد نتایج: 63585  

Journal: :New Zealand Journal of Geology and Geophysics 2021

Mt. Taranaki is an andesitic stratovolcano in the western North Island of New Zealand. Its magmas show slab-dehydration signatures and over last 200 kyr they gradually increasing incompatible element concentrations. Source basaltic melts from upper mantle lithosphere pond at base crust (?25 km), interacting with other stalled rich amphibole. Evolved hydrous rise pause mid (14–6 before taking se...

Journal: :ISPRS international journal of geo-information 2021

Collapses, landslides, and debris flows are the main geological hazards faced by mankind, which bring heavy losses of life property to people every year. The purpose this paper is establish a method for determining optimal weighting scheme multiple hazard susceptibility mapping. information gain ratio (IGR) was used analyze predictive ability conditioning factors. support vector machine (SVM) a...

Journal: : 2023

Extensive field and site investigations were conducted to assess evaluate the situation in presently exploited quarries of cement raw materials Yemen. These have several geological complications represented mainly by high elevations, steep slopes, rugged topography, heterogeneity bed thickness, lithologic composition quality, presence igneous sills dykes, intensive fracturing jointing abundance...

Journal: :International journal of occupational medicine and environmental health 2013
Ashis Bhattacherjee Bijay Mihir Kunar Michele Baumann Nearkasen Chau

OBJECTIVE The role of occupational hazards in occupational injury may be mediated by individual factors across various age groups. This study assessed the role of occupational hazards as well as contribution of individual factors to injuries among Indian and French coalminers. MATERIAL AND METHODS We conducted a case-control study on 245 injured workers and on 330 controls without any injurie...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2010
Felicity Liggins Richard A Betts Bill McGuire

On palaeoclimate time scales, enhanced levels of geological and geomorphological activity have been linked to climatic factors, including examples of processes that are expected to be important in current and future anthropogenic climate change. Planetary warming leading to increased rainfall, ice-mass loss and rising sea levels is potentially relevant to geospheric responses in many geological...

Journal: :international journal of environmental research 0
b. feizizadeh 1department of physical geography centre for remote sensing and gis, university of tabriz, iran, department of geography & geology centre for geoinformatics , university of salzburg, 5020, austria t. blaschke department of geography & geology centre for geoinformatics , university of salzburg, 5020, austria h. nazmfar department of geography and urban planning, university of mohaghegh ardabili, ardabil, iran m.h. rezaei moghaddam department of physical geography centre for remote sensing and gis, university of tabriz, iran

although typically small in terms of their spatial footprint, landslide hazards are relativelyfrequent in northern iran. we assess landslide susceptibility for the nearly 20.000 km2 large study area of the urmia lake basin which is dominated by agricultural land use but includes the major settlements areas of the east azerbaijan province, iran. landslide factors are established in form of gis d...

Journal: Geopersia 2016

Assessing seismic hazards involves specifying the likelihood, magnitude and location of earthquakes in a region. Predicting the seismic hazards is the first step in reducing the impact of the damage caused by an earthquake.  In this study, to fully utilize all the known parameters which may possibly affect the occurrence of earthquakes (mb ≥ 4.5); a data-driven rule-extraction method called the...

2005
W. D. Zhao J. Q. Wang Y. X. Li

According to the field investigation data, a meteorological forecast and alarm model of geologic disasters in Hefei Area has been established. This model was based on GIS raster data model in order to be integrated with GIS Digital Terrain Model (DTM) Component Object Model (COM). Some important factors that put premium on geological hazards, such as intraday and five-day forecasting and limina...

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