نتایج جستجو برای: green cover

تعداد نتایج: 247392  

Journal: :international journal of environmental research 2012
j.o. odindi p. mhangara

given the critical role played by urban green spaces and the emergence of remote sensing as avaluable natural resource management tool, this study sought to identify trends in green spaces within thecontext of south africa’s transition period (1990 - 2000). using the city of port elizabeth as a case study, threesets of landsat - 5 thematic mapper images (1990, 1995 and 2000) were geo-processed,...

Journal: Desert 2016

Green space is one of the important infrastructures for keeping natural life and sustainability in modern urbanism and it provides excellent recreational opportunities for the people in the society. However, there are limiting factors in green space development, especially in arid regions, including extreme weather and soil temperatures, low average rainfall, drought, and high potential for eva...

Journal: :international journal of environmental research 0
j.o. odindi university of kwazulu-natal, school of environmental sciences, pietermaritzburg campus, private bag x01, scottsville 3209, south africa p. mhangara south african national space agency, space operations, p.o. box 484, silverton, 0127, pretoria, south africa

given the critical role played by urban green spaces and the emergence of remote sensing as avaluable natural resource management tool, this study sought to identify trends in green spaces within thecontext of south africa’s transition period (1990 - 2000). using the city of port elizabeth as a case study, threesets of landsat - 5 thematic mapper images (1990, 1995 and 2000) were geo-processed,...

Journal: :یافته های تحقیقاتی در گیاهان زراعی و باغی 0
سمانه راهب موسسه تحقیقات مرکبات ایران، رامسر مرتضی مبلغی بهروز گلعین

in order to investigate the effect of different cover crops on density and diversity of weeds, the researcher carried out an experiment in randomized complete block design with seven treatments and three replications for two years (2009-2010) in iran citrus research institute. treatments included planting four cover crops of legumes such as clover (trifolium alexandrinum l.), green bean (phaseo...

Urbanization through rapid constructions, is the main cause of high heat absorption in urban centers. In addition, the accumulation of heat energy resulted by removal of vegetation cover, has contributed to formation of urban heat islands (UHIs). The spatial distribution of heat intensity in Tehran Metropolitan Area was studied, and the influence of land use and green cover were analyzed in the...

Urbanization through rapid constructions, is the main cause of high heat absorption in urban centers. In addition, the accumulation of heat energy resulted by removal of vegetation cover, has contributed to formation of urban heat islands (UHIs). The spatial distribution of heat intensity in Tehran Metropolitan Area was studied, and the influence of land use and green cover were analyzed in the...

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...

Journal: :IEEE Trans. Geoscience and Remote Sensing 2003
Andrew James Elmore John F. Mustard

Landsat Thematic Mapper (TM) data and spectral mixture analysis have been used to estimate vegetation green cover in the Great Basin, western United States, to 4.0% green cover (%GC). In this paper, we compare estimates of percent green cover derived from EO-1 Advanced Land Imager (ALI) data to estimates derived from field-based analyses and to results derived from Landsat Enhanced Thematic Map...

Land cover changes as a basic factor in environmental change act and has become a global threat. In this research, changes in land cover in rural tourism areas by neural networks, Markov chains in software ArcGIS, ENVI, Terrset using the TM and OLI satellite imagery, Landsat Satellite was surveyed for a period of 30 years for three periods of 1985, 2000, and 2015. The findings of the first stag...

ژورنال: علوم آب و خاک 2009
خواجه الدین, سید جمال الدین, سفیانیان, علیرضا, ضیائی, حمیدرضا, فلاحتکار, سامره,

Remote sensing is the main technology for assessing expansion and rate of land cover changes. Knowing the different kinds of land cover changes and human activities in different parts of lands, as the base information for different planning is especially important. In this study, the land cover changes of Isfahan city that is consist of Isfahan and its` surrounded area was studied for the past ...

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