نتایج جستجو برای: desertification intensity

تعداد نتایج: 182836  

Journal: :مرتع و آبخیزداری 0
الهام السادات شکوهی دانش آموخته کارشناس ارشد مدیریت مناطق بیابانی، دانشکده منابع طبیعی، دانشگاه تهران، ایران. غلامرضا زهتابیان استاد دانشکده منابع طبیعی، دانشگاه تهران، ایران. علی طویلی دانشیار دانشکده منابع طبیعی، دانشگاه تهران، ایران.

more than 80% of iran’s area has arid and semi arid climate. therefore, iran is exposed to desertification process. practical activities in controlling desertification must be based on current desertification situation and its severity. based on this theory, evaluating desertification rate indices in khezrabad region was done based on imdpa model. in this research two factors with 10 indices we...

Journal: :Environmental Conservation 1982

Journal: :EPL (Europhysics Letters) 2014

2014
Junhong Zhang

Karst rocky desertification is a geo-ecological problem in Southwest China because of nature and man-made factors, which restricts the development of local economic and social. Soil and water erosion is one of the most harmful form of rocky desertification, but the management methods still keep in the exploratory stage. Biological soil crust is the organic complexes of biotic components includi...

2016
Yunfa Miao Heling Jin Jianxin Cui

Over the past several thousand years, arid and semiarid China has experienced a series of asynchronous desertification events in its semiarid sandy and desert regions, but the precise identification of the driving forces of such events has remained elusive. In this paper we identify two rapid desertification events (RDEs) at ~4.6 ± 0.2 ka BP and ~3.3 ± 0.2 ka BP from the JJ Profile, located in ...

Journal: :international journal of advanced biological and biomedical research 0
zahra bayat m.sc. student of desertification, faculty of natural resources, university of semnan, semnan, iran seyed hassan kaboli assistance professor of desertification, faculty of natural resources, semnan university, iran mohammad rahimi assistance professor of desertification, faculty of natural resources, semnan university, iran shima nikoo ph.d of desertification, faculty of natural resources, university of semnan, semnan, iran mohammadkia kianian instructor of desertification, faculty of natural resources, university of semnan, semnan, iran neda soleiman dehkordi m.sc. student of desertification, faculty of natural resources, university of semnan, semnan, iran

desertification could be traced back to one or many factors. thus, to cope with such a phenomenon, there exists a need for a profound understanding of the processes and the causes. the study area of the current paper is the extent of shahrekord’s marghzar as an important case amongst the important ones of the province. in order to evaluate the roots of desertification in the area, the iranian m...

2008
L. LI A. H. WANG

Land desertification has become a significant issue of economy and ecological environment in global area. In this paper, we have applied the object-oriented method to the research of Zhenglanqi basin and the West of Badain Jaran Desert which present obviously different characters of china. On the basis of the multi-spectral images of Beijing-1 in June and September in 2006, under the standard c...

2015
Shou-Li Li Fei-Hai Yu Marinus J. A. Werger Ming Dong Heinjo J. During Pieter A. Zuidema

Desertification is a global environmental problem, and arid dunes with sparse vegetation are especially vulnerable to desertification. One way to combat desertification is to increase vegetation cover by planting plant species that can realize fast population expansion, even in harsh environments. To evaluate the success of planted species and provide guidance for selecting proper species to st...

Journal: :Remote Sensing 2014
Thomas P. Higginbottom Elias Symeonakis

Land degradation and desertification has been ranked as a major environmental and social issue for the coming decades. Thus, the observation and early detection of degradation is a primary objective for a number of scientific and policy organisations, with remote sensing methods being a candidate choice for the development of monitoring systems. This paper reviews the statistical and ecological...

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...

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