نتایج جستجو برای: landslides

تعداد نتایج: 4980  

Journal: :مرتع و آبخیزداری 0
ابراهیم امیدوار استادیار گروه آبخیزداری، دانشکدة منابع طبیعی و علوم زمین، دانشگاه کاشان عطااله کاویان دانشیار دانشکدة منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری

landslides are the major natural hazard, causing significant damage to properties, lives and engineering projects in all mountainous areas in the world. in order to estimate the role of the landslides in erosion processes and evaluation of their risks, it is necessary to quantify landslides. this quantifying can be performed by applying the probability distributions that show the landslide size ...

2001
G. B. Crosta P. Frattini

Hazard assessment of shallow landslides represents an important aspect of land management in mountainous areas. Among all the methods proposed in the literature, physically based methods are the only ones that explicitly includes the dynamic factors that control landslide triggering (rainfall pattern, land-use). For this reason, they allow forecasting both the temporal and the spatial distribut...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2006
D G Masson C B Harbitz R B Wynn G Pedersen F Løvholt

Huge landslides, mobilizing hundreds to thousands of km(3) of sediment and rock are ubiquitous in submarine settings ranging from the steepest volcanic island slopes to the gentlest muddy slopes of submarine deltas. Here, we summarize current knowledge of such landslides and the problems of assessing their hazard potential. The major hazards related to submarine landslides include destruction o...

Journal: :Remote Sensing 2015
Panpan Tang Fulong Chen Huadong Guo Bangsen Tian Xinyuan Wang Natarajan Ishwaran

The region near Dujiangyan City and Wenchuan County, Sichuan China, including significant giant panda habitats, was severely impacted by the Wenchuan earthquake. Largearea landslides occurred and seriously threatened the lives of people and giant pandas. In this paper, we report the development of an enhanced multi-temporal interferometric synthetic aperture radar (MTInSAR) methodology to monit...

Journal: :Remote Sensing 2013
Pascal Lacroix Bilberto Zavala Etienne Berthier Laurence Audin

Earthquake is one of the dominant triggering factors of landslides. Given the wide areas covered by mega earthquake-triggered landslides, their inventory requires development of automatic or semi-automatic methods applied to satellite imagery. A detection method is here proposed for this purpose, to fit with simple datasets; SPOT5 panchromatic images of 5 m resolution coupled with a freely and ...

2013
B. M. Pradhan

landslide also referred to as mass movement, slope failures, slope instability, and terrain instability is the mass movement, usually sudden, of soil and debris down a steep slope (Cruden, 1991). They are caused by a variety of factors such as heavy rains, earthquake ground shaking or geological forces. Different types of landslides move down slope at a wide range of speeds (Varnes, 1978). Most...

2017
Qigen Lin Ying Wang Tianxue Liu Yingqi Zhu Qi Sui

The lack of a detailed landslide inventory makes research on the vulnerability of people to landslides highly limited. In this paper, the authors collect information on the landslides that have caused casualties in China, and established the Landslides Casualties Inventory of China. 100 landslide cases from 2003 to 2012 were utilized to develop an empirical relationship between the volume of a ...

2009
M. T. Brunetti G. Tonelli S. Luciani

We are designing a system to forecast rainfall-induced landslides in Italy. The system is based on a set of rainfall thresholds for the possible initiation of landslides, and an ensemble of small scale landslide hazard and risk zonations. Rainfall thresholds include existing and new, national, regional and local empirical thresholds of the intensity-duration (ID) and normalized-ID types. The ne...

2007
A. Lucas A. Mangeney D. Mège

A new landslide mobility parameter that takes the friction angle into account can shed new light into the dynamics of large Martian landslides. Introduction: Landslide morphologies have been identified on Mars [1-2]. Some similarities between experiments on dry granular spreading and Large Martian Landslides (LML) convey to conlude on dry conditions [3]. However, normalized runout on Mars is tw...

Journal: :ecopersia 2012
ali reza nafarzadegan ali talebi hossein malekinezhad naeim emami

rainfall is recognized as one of the main triggering factors of landslides. researchers have long attempted to determine the amount of precipitation required to trigger slope failures. one of the landslide zones in iran is chaharmahal & bakhtiari province where many landslides cause high casualties in recent decades. it is significant that most of these landslides occur after a rainy period...

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