نتایج جستجو برای: barren land and forest to detect changes

تعداد نتایج: 18388419  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده شیمی 1389

in this thesis, a new optically active poly(amide-imide) (pai) was synthesized by the indirect polycondensation reaction of the l-phenylalanine based diacid chloride and 4,4?-diaminodiphenylether in the presence of triethylamine in n-methyl-2-pyrrolidone. the formation of pai was confirmed by ftir, 1h nmr and elemental analysis. in next step, the surface of titanium dioxide (tio2) nanoparticles...

Journal: :Journal of environmental management 2006
Shu-Kuang Ning Ni-Bin Chang Kai-Yu Jeng Yi-Hsing Tseng

Soil erosion associated with non-point source pollution is viewed as a process of land degradation in many terrestrial environments. Careful monitoring and assessment of land use variations with different temporal and spatial scales would reveal a fluctuating interface, punctuated by changes in rainfall and runoff, movement of people, perturbation from environmental disasters, and shifts in agr...

Land-use change is one of the most important challenges of land-use planning that lies with planners, decision-makers and policymakers and has a direct impact on many issues, such as economic growth and the quality of the environment. The present study examines the land use change trends in Behbahan city for 2014 and 2028 using LCM in the GIS environment. Analysis and visibility of user variati...

2017
Qiong Gao Mei Yu

Impact of changes in land cover and land use on hydrological service of tropical watersheds is one of the focal research tropics in both hydrology and Land Cover Land Use Changes (LCLUC). Land fragmentation is an important feature of LCLUC, however, its impact on hydrological service of tropical watershed is unclear despite a few theoretical frameworks. In this paper, we described a simulation ...

2013
Zhi Li WenZhao Liu FenLi Zheng

A series of soil conservation measures have been carried out to reduce soil loss on the Loess Plateau of China since 1950s, and the biologic measures were implemented according to topographic factors such as slope and elevation; therefore, the changes in topographic factors of land use can indicate the effects of the biologic measures. The objectives of this study were to (i) analyze the land u...

2017
Zhuo Wu Quansheng Ge Erfu Dai Audrey L. Mayer

Forests are under pressure from land use change due to anthropogenic activities. Land use change and harvest are the main disturbances of forest landscape changes. Few studies have focused on the relative contributions of different disturbances. In this study, we used the CA-Markov model, a land-use change model, coupled with a forest landscape model, LANDIS-II, to simulate dynamic change in Ta...

2002
Brian Hall Glenn Motzkin David R. Foster Mindy Syfert

Aim The aim of this study was to document changes in forest composition, structure and distribution across Massachusetts, USA, from the time of European settlement (seventeenth century) to the present, and to investigate environmental and historical influences on regional patterns of variation. Location The study area encompasses the State of Massachusetts (69.9–73.5 E, 41.3– 42.9 N), a 21,000-...

Land use change is certainly the most important factor that affects the conservation of natural ecosystems, resulting the conversion of natural lands such as forests and pastures into agricultural, industrial and urban areas. Despite numerous studies investigating landscape patterns due to land use change, the driving forces of landscape change has been less studied in Iran. In this study, Arti...

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 ...

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Background: Public participation in decisions regarding natural resources is the easiest way to ‎preserve these resources. It seems that having human of conservation ethics of natural resources, ‎has affect on their participation in the preservation of natural resources. This survey research was ‎done to investigate the relationship between conservation ethics of natural resources and ‎particip...

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