نتایج جستجو برای: de desertification

تعداد نتایج: 1533589  

2013
Fan Hui Chen Zheng

With the development of computer technology and the improvement of people’s living level, the use of computers to deal with the photos is more and more popular. How to combine the computer and image perfectly will directly affect the quality of our image. Research of this article is how to manage the image by computer to desertification, that processing the image into desertification style. The...

2016
Ziqiang Du Xiaoming Xu Hong Zhang Zhitao Wu Yong Liu

Arid and semi-arid areas in North China are facing the challenge of a rising aeolian desertification risk (ADR) due to the intertwined effects of complex natural processes and intensified anthropogenic activities. An accurate quantitative assessment of the relationship between ADR and its determinants is beneficial for understanding the driving mechanisms of aeolian desertification and for cont...

2005
M. Greco

The paper deals some important aspects concerning the study of desertification phenomenon that has significantly interested all European countries of the Mediterranean basin in the last decades. The territorial sensibility, qualitatively and/or quantitatively, of the risk related to the desertification processes has been valued as grade of susceptibility to the phenomenon in the study area, wit...

Journal: Desert 2014

The assessment of de-desertification alternatives can be effective in controlling the reclamation of disturbed landand avoiding destruction of areas at risk. Until now, there has been no method to consider different criteria andalternatives, or to present the optimum alternatives based on systematic structures and experts’ perspectives.Desertification is a complex process resulting from various...

2004
Andreas Rechkemmer

This discussion paper is about the United Nations Convention to Combat Desertification (UNCCD) one of the multilateral agreements that came out of the UN Conference on Environment and Development (UNCED) held in Rio de Janeiro in 1992. UNCCD is based on a conceptualization of international relations that transcends to a large extent the traditional notions of inter-governmental treaties. Such p...

2003
J. Hill

During the 20th century, purely climate climatic factors were rarely responsible for desertification in the Mediterranean region, because droughts are relatively short-lived. Present land degradation in Northern Mediterranean countries is partially due to dramatic land use changes that occurred during the second half of this century and which in many cases lead to an unstable state of ecosystem...

Journal: :Int. J. Applied Earth Observation and Geoinformation 2014
Xia Zhang Kun Shang Yi Cen Tong Shuai Yanli Sun

Coverage rates of vegetation and exposed bedrock are two key indicators of karst rocky desertification. In this study, the abundances of vegetation and exposed rock were retrieved from a hyperspectral Hyperion image using linear spectral unmixing method. The results were verified using the spectral indices of karst rocky desertification (KRDSI) and an integrated LAI spectral index: modified chl...

Journal: :Remote Sensing 2015
Lijuan Miao Peilong Ye Bin He Lizi Chen Xuefeng Cui

Dry Land Asia is the largest arid and semi-arid region in the northern hemisphere that suffers from land desertification. Over the period 1982–2011, there were both overall improvement and regional degeneration in the vegetation NDVI. We analyze future climate changes in these area using two ensemble-average methods from CMIP5 data. Bayesian Model Averaging shows a better capability to represen...

2013
Ning Liu Lihua Zhou J. Scott Hauger

This paper undertakes a direct, comprehensive assessment of the long-term sustainability of desertification rehabilitation in China under a plausible but worst case scenario where governmental interventions, in the form of payments for environmental services (PES), will cease. The analysis is based on household behavior as well as experimental data. Our econometric results highlight the main ob...

2016
Ya Wang Lihua Zhou

Sandy desertification is one of the most severe ecological problems in the world. Essentially, it is land degradation caused by discordance in the Social-Ecological Systems (SES). The ability to coordinate SES is a principal characteristic of regional sustainable development and a key factor in desertification control. This paper directly and comprehensively evaluates the ability to coordinate ...

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