نتایج جستجو برای: desertification map

تعداد نتایج: 196664  

Introduction Nowdays desertification is a disaster in many countries , especially in developing countries. This problem includes natural factors and improper human activities. According to the expansion of desertification, providing the appropriate management methods will be reduced desertification intensity and its expansions. In this way, knowledge of processes of desertification and facto...

2003
Alfredo Huete Tomoaki Miura Xiang Gao Carlos Borghi Ricardo Ojeda

Land degradation impacts on several critical environmental issues such as food security, diminishing quality and quantity of fresh water resources, preservation of natural resources, loss of biodiversity, and global climate change. Land degradation is responsible for soil erosion and can eventually lead to desertification. The International Convention to Combat Desertification (CCD) defines des...

2012
Tao Zhao Zhao Liu Changxin Zhao Cui Mao

At present, the severe oil crisis and greenhouse effect are booming, which is a growing worry for China. Over a long period of study, choosing the development of biological diesel is a feasible way in the desertification region in China. With considering the adaptability of Micro-algae in desertification region and analyzing energy consumption and carbon calculations of Micro-algae biodiesel pr...

حلبیان , امیرحسین , سلطانیان , محمود ,

One of the most important calamities that affect the arid and semi- arid regions and is taken into account as threatening factors for human- life and destroying the natural resources is desertification, so recognizing and forecasting this phenomenon is very important. Desertification is a complex phenomenon, which as environmental, socio-economical, and cultural impacts on natural resources. In...

Journal: :Remote Sensing 2016
Xiaobin Ren Zhibao Dong Guangyin Hu Donghai Zhang Qing Li

Aeolian desertification is a kind of land degradation that is characterized by aeolian activity, resulting from the responses of land ecosystems to climate change and anthropogenic disturbances. The source areas of the Yangtze and Yellow Rivers are typical regions of China’s Tibetan Plateau affected by aeolian desertification. We assessed the vulnerability of these areas to aeolian desertificat...

2010
Lihua Yang Jianguo Wu

Desertification has been widely recognized as a major environmental and ecological problem facing humanity today. Combating desertification is a global challenge for sustainable development and requires collective action involving government, local communities, businesses, NGOs, and international organizations. Scholars’ role in this important endeavor and their mechanisms of participation, how...

2006
Mark Winslow Barry I. Shapiro Richard Thomas S. V. R. Shetty

ICARDA and ICRISAT are nonproft international agricultural research centers supported by the Consultative Group on International Agricultural Research (CGIAR). They focus on sustainable agricultural development for the dryland poor. They also convene a global, multi-institutional partnership known as the Desertification, Drought, Poverty and Agriculture Consortium (DDPA) to provide research con...

Journal: :Environmental management 2010
Lihua Yang Zhiyong Lan Jianguo Wu

This study investigated the perceived importance of scholars' participation in combating-desertification programs in northwest China and analyzed the underlying factors and mechanisms. Our results show that, while various experts, professors, and researchers have participated in combating-desertification programs, their actions were often not effective. Only those scholars who understood the lo...

2008
Li CUI

Desertification is caused by the influence of the climatic, environmental changes and human activities. Its enlargement and reverse leads to not only the changes of spatial structure, scope and environment but also the development of society and economy. Chose TM remote sensing images which had two different temporal phases as data sources. Through data preprocessing and the choice of suitable ...

2013
Haim Weissmann Nadav M. Shnerb

The process of desertification is usually modeled as a first order transition, where a change of an external parameter (e.g. precipitation) leads to a catastrophic bifurcation followed by an ecological regime shift. However, vegetation elements like shrubs and trees undergo a stochastic birth-death process with an absorbing state; such a process supports a second order continuous transition wit...

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