نتایج جستجو برای: permanent fires were distinguished from random fires. finally

تعداد نتایج: 7398840  

Journal: :محیط شناسی 0
علی سرکارگر اردکانی دانشجوی دکتری سنجش از دور دانشکدة مهندسی نقشه برداری دانشگاه صنعتی خواجه نصیر الدین طوسی محمد جواد ولدان زوج دانشیار گروه سنجش از دور دانشکدة مهندسی نقشه برداری دانشگاه خواجه نصیر الدین طوسی علی منصوریان استادیار گروه سنجش از دور دانشکدة مهندسی نقشه برداری دانشگاه خواجه نصیر الدین طوسی

according to reports of forest range and watershed management organization of iran, hundreds of forest fires take place in our country every year. due to destroying forest and grass land in different parts of iran, especially in zagross and alborz mountain, it is necessary to develop new methods to reduce fire effects in these places. there are many parameters that increase probability of fire ...

Journal: :جنگل و فرآورده های چوب 0
فرخ پورشکوری اله ده دانشجوی دکتری جنگل‏داری، دانشکدۀ منابع طبیعی دانشگاه تهران، کرج، ایران علی اصغر درویش صفت استاد دانشکدۀ منابع طبیعی دانشگاه تهران، کرج، ایران فرهاد صمدزادگان استاد دانشکدۀ فنی دانشگاه تهران، تهران، ایران پدرام عطارد دانشیار دانشکدۀ منابع طبیعی دانشگاه تهران، کرج، ایران

moderate resolution imaging spectroradiometer (modis) have been widely used for active fire detection in the world as the specific channels used for the fire detection have made the modis images applicable. the main objective was to explore the capability of modis images for active fire detection in the zagross forests using the modis contextual algorithm. the study was performed in the marivan...

Journal: :Review of International American Studies 2019

2014
Scott L. Goodrick Gary L. Achtemeier Narasimhan K. Larkin Yongqiang Liu Tara M. Strand

Among the key issues in smokemanagement is predicting themagnitude and location of smoke effects. These vary in severity from hazardous (acute health conditions and drastic visibility impairment to transportation) to nuisance (regional haze), and occur across a range of scales (local to continental). Over the years a variety of tools have been developed to aid in predicting smoke effects. This ...

2005
Yongqiang Liu

Smoke from wildland fires is one of the sources of atmospheric anthropogenic aerosols. it can dramatically affect regional and global radiative balance. Ross et al. (1998) estimated a direct radiative forcing of nearly -20 ~ m ' for the 1995 Amazonian smoke season (August and September). Penner et al. (1992) indicated that the magnitude of the smoke global radiative forcing is comparable to tha...

Journal: :caspian journal of environmental sciences 2012
a mahdavi

wildfire in forests and rangelands, apart from its initiating causes, is considered as an ecological disaster. zoning natural areas according to their susceptibility to fire helps to put off operations and reduces catastrophic losses caused through a wise management plan. in this study, the zoning map of wildfire risk in forest and rangeland areas has been produced using gis, analytical hierarc...

2017
Luis Casanova

The use of remote sensing techniques for the study of forest fires is a subject that started already several years ago and whose possibilities have been increasing as new sensors were incorporated into earth observation international programmes and new goals were reached based on the improved techniques that have been introduced. Three main topics can be distinguished, in which remote sensing p...

2012
Luis Casanova

The use of remote sensing techniques for the study of forest fires is a subject that started already several years ago and whose possibilities have been increasing as new sensors were incorporated into earth observation international programmes and new goals were reached based on the improved techniques that have been introduced. Three main topics can be distinguished, in which remote sensing p...

2015
Paraskevi Karanikola Stilianos Tampakis Anastasia Paschalidou Anastasia Matoli

Forest fires are considered as a major and permanent threat for the forests of Cyprus. Every year, forest fires cause enormous and irreparable damage to forest ecosystems and in some cases threaten residential regions. The present work aims at studying the perceptions and attitudes of the residents of the prefecture of Larnaca with regards to the actions of the Cyprus Fire Department and the ot...

2016
Futao Guo Lianjun Zhang Sen Jin Mulualem Tigabu Zhangwen Su Wenhui Wang

Frequent and intense anthropogenic fires present meaningful challenges to forest management in the boreal forest of China. Understanding the underlying drivers of human-caused fire occurrence is crucial for making effective and scientifically-based forest fire management plans. In this study, we applied logistic regression (LR) and Random Forests (RF) to identify important biophysical and anthr...

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