نتایج جستجو برای: four dimensions of land cover

تعداد نتایج: 21216114  

Nowadays, one of the most important factor for better land management are the land administration systems. Therefore, it is necessary accurate and up-to-date data on these systems. Common data collection methods, such as photogrammetry and remote sensing, are usually cost-effective and somewhat time-consuming. So, it is necessary to find new methods for data collection in order to keep land adm...

Land Use and Land Cover Change (LULCC) is the most prominent cause of Soil Organic Carbon (SOC) variability in any landscape. Kenyan Arid and Semi-Arid Lands (ASALs) have been facing extensive land use/ cover changes in the last three decades prompting a review on the impacts it has on soil quality and consequently on land degradation. This study was carried out in 2016 in Olesharo Catchment, N...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده ادبیات و علوم انسانی 1391

the present study aimed to investigate representation of discourse markers and metadiscourse markers in conversations and readings of general elt coursebook series used in the language centers of iran. to this aim, four elt coursebooks popularly taught in language centers of this country were analyzed based on fung and carter’s (2007) framework regarding discourse markers and hyland’s (2005) fr...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده منابع طبیعی و علوم دریایی 1388

this research was conducted in two protect and destroy region in the middle zagros, in illam province. in order to identification of ecological species group and evaluate density of regeneration, effect of many factors such as protection, vegetation, physiographic factors, physical and chemical properties of soil in study locations were studied. to achieve these purpose number of 54 plots using...

2017
Jian Duan Jie Yang Chongjun Tang Lihua Chen Yaojun Liu Lingyun Wang

Rainfall patterns and land cover are two important factors that affect the runoff generation process. To determine the surface and subsurface flows associated with different rainfall patterns on sloping Ferralsols under different land cover types, observational data related to surface and subsurface flows from 5 m × 15 m plots were collected from 2010 to 2012. The experiment was conducted to as...

Land use/cover change is one of the main factors in environmental changes. The changes directly affect the value of ecosystem services. The purpose of this research is to evaluate the effect of land use/land cover change in the Kashkan area on its ecosystem services. This research was carried out in three stages, including the analysis of land cover changes, prediction of changes, and carbon st...

Journal: :محیط زیست طبیعی 0
بیت الله محمودی دانشجوی دکتری، گروه جنگلداری و اقتصاد جنگل، دانشکدۀ منابع طبیعی دانشگاه تهران، ایران جهانگیر فقهی دانشیار گروه جنگلداری و اقتصاد جنگل، دانشکدۀ منابع طبیعی دانشگاه تهران، ایران مجید مخدوم استاد گروه جنگلداری و اقتصاد جنگل، دانشکدۀ منابع طبیعی دانشگاه تهران، ایران محمد عواطفی همت استادیار گروه جنگلداری و اقتصاد جنگل، دانشکدۀ منابع طبیعی دانشگاه تهران، ایران

local areas are fundamental constituent parts of planning at national and international levels. these areas are the first foundation of centraliozation and non-centralization of sustainable development.in the present study, the consistency condition of customary areas in mondje region, located in lordegan city- chahar mahal bakhteyari province, was assessed using of the iucn model. in this appr...

ژورنال: علوم آب و خاک 2009
براتی قهفرخی, سوسن, خواجه الدین, سید جمال الدین, رایگانی, بهزاد, سلطانی کوپایی, سعید,

To investigate land use changes, Qale Shahrokh basin (15098.1 ha area) was selected. Satellite images of Landsat sensors (MSS, TM and ETM+) were used. After improvement and different enhancement analysis of images such as FCC, PCA, the study area was checked using GPS and topographic maps (1:50000) and other information. Land use units were determined using classified random sampling method. Ma...

Surface waters are the most important economic resource for humans which provide water for agricultural, industrial and anthropogenic activities. Surface water quality plays vital role in protecting aquatic ecosystems. Unplanned urbanization, intense agricultural activities and deforestation are positively associated with carbon, nitrogen and phosphorous related water quality parameters. Multip...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم انسانی و اجتماعی 1389

today the image of a permanent skeletal space of cities affected by some forces or mechanisms is put in time with social-economic development and while imposes a new face and perspective to physical anatomy of cities, and prepares field to changes in content and social- economic structures of cities too. simultaneously with quitting villages in order to settle in cities by villagers, the phen...

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