نتایج جستجو برای: landslide hazard zonation
تعداد نتایج: 72146 فیلتر نتایج به سال:
nowadays, occurrence of mass movement in the northern forests ofiran, especially in the golestan province is turning to be a usual phenomenon. because of decay of vegetation cover, prediction of landslide occurrence will prevent its damages. landslide hazard zonation is a suitable way in this case. selection of the best model is a way to decrease costs and time. consequently, land slide hazard ...
it is very important to recognize the areas with high potential risk of landslide in order to resist that. in a case study, thirty three landslides have been observed in safarood watershed. the purpose of this study is to recognize factors and zonation of potential areas for landslide. this paper covers specific factors including lithology, fault, height, slope, direction, rainfall, soil, veget...
Identifying areas with different potential to landslide occurrence is one of the primitive actions in natural resources management. In view of importance of recognizing appropriate metho d to estimate landslide, in this research, the efficiency of two methods of landslide hazard zonation including methods of Mora and Varson and Multivariate regression were compared . In this research, first, ...
Landslide is one of the natural disasters which cause a lot of annual damage directly or indirectly in the world. Land use changes and high rainfall are leading causes of creation this phenomenon in Beheshtabad basin. Therefore the effective factors were analyzed in this process. The main aim of this study is comparison of two methods AHP and FAHP that are used in landslide hazard zonation by c...
حوضه آبخیز سیاهرود در بخش رحمت آباد شهرستان رودبار گیلان قرار دارد. که مساحت این حوضه 110 کیلومتر مربع است. هدف از این تحقیق بررسی پتانسیل زمین لغزش و پهنه بندی آن به روش ahp در سطح حوضه می باشد که با استفاده از عکس هوایی، نقشه های زمین شناسی و توپوگرافی و پیمایش صحرایی پراکنش زمین لغزش ها در گستره ی مورد مطالعه مشخص می گردد. از این رو در این تحقیق نقشه های مربوط با استفاده از سیستم gis تهیه و ...
This paper presents a new approach of landslides zonation hazard studies, based on an integrated study of structural data along with geomorphological and external factors, in a hilly regions of Brazil, covered by a tropical humid rain-forest, called Serra do Mar. The Serra do Mar consists of a hilly region along the east coast of Brazil, with high slopes and many geological structures in a gnei...
The degree of hazard due to landslide in any region is difficult to assess manually. An automated system having capability to correlate causes contributing automated landslide hazard is expected to be an efficient alternative. The objective of this paper is to explain LHAZ (Landslide Hazard Automated Zonation) system, an automated system that has been developed to determine the intensity and ex...
more than 30% of iran's land is formed from mountainous areas. so each year, landslides cause damages to structures, residential areas and forests, creating sedimentation, muddy floods and finally deposit the sediments in reservoir dams. therefore, for preventing of this damages and expressing the sensitivity rate of hillslopes, landslide hazard zonation is considered in prone areas. the p...
During recent years, landslide incidence has been increased in different areas with different reasons like change in land use and road introduction. It is necessary to research and survey that’s creation factors and identity sensitive areas to prohibit of probable damages. For this reason, This study were carried out in Northern of Tehran watershed with about 42.14 km2 area. In order to landsli...
natural hazards are among destructive agents that annually take thousands of lives and impose devastating damages in iran. spotting such a high risk areas can help reducing the amount of their probable risk. a 1:500000 liquefaction and landslide hazard zonation map developed for the southern shoreline of the caspian sea. this geotechnical hazard map divides the study area to 15 hazard classes (...
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