نتایج جستجو برای: landuse changes especially in rangelands

تعداد نتایج: 17023080  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم کشاورزی و منابع طبیعی گرگان - دانشکده مرتع و آبخیزداری و شیلات و محیط زیست 1391

مراتع حدود نیمی از خشکی های جهان را در بر دارند و پوشش گیاهی آن در نتیجه تأثیر متقابل محیط و موجودات زنده به وجود آمده است و به عنوان یک اکوسیستم طبیعی مدیریت می شوند. علاوه بر مراتع، راه ها در عصر حاضر نیز از اجزا مهم و زیرساخت های اصلی زندگی نوین و توسعه کشورها به شمار می روند. جاده ها ساخته دست بشر هستند و جوامع گیاهی کنار جاده تحت تأثیر ساخت و ساز قرار دارند. پوشش "رودرال" به مجموعه ای از پ...

Journal: :مرتع و آبخیزداری 0
مهدی قربانی دانشجوی دکتری مرتعداری، دانشکده منابع طبیعی، دانشگاه تهران، ایران علی اکبر مهرابی استاد دانشکده منابع طبیعی، دانشگاه تهران، ایران محمدرضا ثروتی دانشیار دانشگاه شهید بهشتی، ایران علی اکبر نظری سامانی استادیار دانشکده منابع طبیعی، دانشگاه تهران، ایران

nowadays, population growth and on the other hand resources limitations astonish authorities. population changes cause variation in economic activities and land use changes. as a whole, overusing, improper land use and human disturbances over natural resources make environmental imbalances worse. in recent decades, we have seen land use changes in taleghan basin. land use changes were produced ...

Journal: :Water Resources Management 2021

Landuse change and climate are the main drivers of hydrological processes. The purpose this study was to analyse separate combined future effects landuse changes on water balance components different spatial temporal scales using integrated Soil Water Assessment Tool model. focused relationship between yield (WYLD) sediment (SYLD) in heterogeneous Taleghan Catchment Iran. For scenarios, RCP 4.5...

Journal: Desert 2020
A. Abolhasani Gh.R. Zehtabian, H. Khosravi, M. Jafary Sh. Javadi

Compared to surface water, groundwater resources are the primary source of water supply in arid and semi-arid regions of Iran, hence the importance of the management of these resources .  In this regard, we assessed the effects of landuse changes on the qualitative and quantitative status of groundwater resources in Eshtehard region, Iran. Through processing and analyzing the satellite images, ...

2000
John McPeak

Economists have argued that commonly held African rangelands are suffering widespread degradation due to overstocking. However, in many areas, degradation is localized rather than widespread. Current common property models are insufficient for analysis of such degradation. A model is developed identifying conditions leading to spatial differences in rangeland condition. Analysis of longitudinal...

2004
Li Yingcheng

Following rapid development of economy in China, great changes also take place in landuse status, especially in the urban area. In order to quickly and truly acquire the information of landuse changes and status in quo, aid the government to scientifically manage the land resource, National Land and Resource Department executes a Landuse RS Monitoring project that began from 1999 and will keep ...

Assessing habitat changes is an important step in the spatial prioritization of management efforts, aimed at reducing conflicts. We assessed landuse/cover change in areas with high risk of human-bear conflict in Fars province. In the first step, we predicted the conflict hotspots, using bear damage incidents, a suit of predictors, and the Ensembles of Small Models (ESMs) approach. In the second...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران 1388

target tracking is the tracking of an object in an image sequence. target tracking in image sequence consists of two different parts: 1- moving target detection 2- tracking of moving target. in some of the tracking algorithms these two parts are combined as a single algorithm. the main goal in this thesis is to provide a new framework for effective tracking of different kinds of moving target...

2012
M. Usha K. Anitha

This study examines the use of image processing and remote sensing in landuse changes mapping for Palladam Taluk between 1972(Topographic sheets) and 2011(satellite images). The layers of landuse map (1972) were digitized by heads-up digitization method in Quantum GIS (QGIS) software environment. Similarly the layers of landuse map (2011) were developed by supervised classification of satellite...

Adverse changes in rangeland vegetation can be considered as one of the criteria for land degradation. Some of these changes can be evaluated through monitoring the spatial changes of landscape parameters. This study aimed to investigate the landscape changes in Kezab rangelands of Yazd province, central Iran. Landsat satellite images of 1990, 2002, and 2013, and landscape metrics including Tot...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید