نتایج جستجو برای: satellite images of irs_1c

تعداد نتایج: 21186900  

ژورنال: مرتع 2022

Background and objectives: Vegetation is one of the most important elements of an ecosystem, which is directly related to the moisture conditions of the land. Estimation of plant drought indices such as VCI, TCI, VHI is an effective tool to assess the effects of drought by calculating NDVI. In this regard, several studies have been conducted that explain how to calculate and use these indicator...

Journal: :جغرافیا و توسعه ناحیه ای 0
محمد رضا افشاری آزاد هاله پورکی

the volume and surface area of the coast is a function of basin water levels. recognizing the factors of coastal geomorphologic changes could have a pivotal role in planning and managing the coast. effective factors in the formation and evolution of geomorphologic factors such as geological, tectonic, paleoclimatic, paleoclimatic and sea level changes have been considered in this study and the ...

ژورنال: علوم آب و خاک 2016
ابراهیمی, کیومرث, حسینی موغاری, سیدمحمد, دزفولی, دنیا,

Precipitation is an important element of the hydrologic cycle and lack of this data is one of the most serious problems facing research on hydrological and climatic analysis. On the other hand, using satellite images has been proposed by many researchers as one of practical strategies to estimate precipitation. The present paper aims to evaluate the accuracy of satellite precipitation data, pro...

ژورنال: علوم آب و خاک 2022

Humans are always trying to change land to use natural resources to meet their needs. One of the land use changes that take place in order to benefit from sustainable water resources is dam construction. Dam construction has many positive and negative consequences for the environment from the beginning to use. The objective of this study was to investigate the effect of Gotvand Dam on the probl...

Journal: Desert 2006
A. Kelarestaghi, H. Ahmadi M. Jafari

Land use change may influence many natural phenomena and ecological processes, including runoff, soil erosion, sedimentation and soil conditions. Decreasing of forest area in the North of Iran is one of the critical problems in recent years. The aims of this study are to detect land use changes between 1967 to 2002 using satellite images of Land Sat 7 ETM+ (2002), aerial photos and digital topo...

Journal: :محیط زیست طبیعی 0
زینت گومه کارشناس ارشد سنجش از دور و gis، دانشگاه شهید چمران اهواز کاظم رنگزن استادیار گروه سنجش از دور و gis، دانشکده علوم زمین، دانشگاه شهید چمران اهواز علی اکبر نظری سامانی استادیار گروه احیای مناطق خشک و کوهستانی، دانشکدۀ منابع طبیعی، دانشگاه تهران جمال قدوسی مدرس دانشگاه آزاد اسلامی، واحد علوم تحقیقات

urbanization and population growth along with an increase in the environmental pollution resulting from human activities which have dramatically changed the green space and land cover have been key factors in the sustainable development of land and the management of land use. to collect reliable data required for providing land cover maps as well as for investigating the environment, remote sen...

2006
Yun Zhang Pingping Xie

This paper presents an automatic system for generating multi-scale colour 3D satellite images and dynamic visualization of 3D images through the Internet. Medium-resolution satellite images such as Landsat 7 and high-resolution satellite images such as Ikonos or QuickBird are the data sources for the multi-scale 3D images. New image fusion, colour enhancement and stereoscopy algorithms are deve...

Journal: :محیط زیست طبیعی 0
شیرکو جعفری دانشجوی کارشناسی ارشد محیط زیست، دانشکدۀ منابع طبیعی، دانشگاه تهران، ایران، کرج افشین علیزاده شعبانی استادیار دانشکده منابع طبیعی، دانشگاه تهران، ایران، کرج افشین دانه کار دانشیار دانشکده منابع طبیعی، دانشگاه تهران، ایران، کرج علی اکبر نظری سامانی استادیار دانشکده منابع طبیعی، دانشگاه تهران، ایران، کرج

internationally, one of the most important purposes to establish a national park is to protect a unique ecosystem with all its inclusive biota. therefore, this will facilitate the management and protection of the neighboring lands. unfortunately, this trend was reversed in iranian national parks. during recent decades, the land cover changes in protected areas have led to the decrease of the re...

INTRODUCTION Since the land use change affects many natural processes including soil erosion and sediment yield, floods and soil degradation and the chemical and physical properties of soil, so, different aspects of land use changes in the past and future should be considered particularly in the planning and decision-making. One of the most important applications of remote sensing is land ...

حنفی بجد, احمدعلی, سلطانی, ماهیار, ناصح, هما, وطن دوست, حسن, چهاراهی, ذبیح الله,

Background and Aim: Arthropod-borne diseases are one of the major causes of human mortality. Since launch of the first meteorological satellites in 1960s, remote sensing has been increasingly implicated in the field of human health research and the data from satellites and their sensors with different spatial and temporal resolutions opened a new field of research in human health for scientists...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید