نتایج جستجو برای: deforestation and desertification

تعداد نتایج: 16827997  

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...

ژورنال: علوم آب و خاک 2017

This paper aimed to assess the severity of desertification in Segzi plain located in the eastern part of Isfahan city, focusing on groundwater quality criteria used in MEDALUS model. Bayesian Belief networks (BBNs) were also used to convert MEDALUS model into a predictive, cause and effects model. Different techniques such as Kriging and IDW were applied to water quality data of 12 groundwater ...

Journal: :desert 2013
t. mesbahzadeh h. ahmadi gh.r. zehtabian f. sarmadian

land degradation, or desertification, is specific to arid, semi-arid, and dry sub-humid regions. the rate of thisphenomenon is high in developing countries such as iran. this research investigated desertification and mapping ofdesertification in abuzaydabad, near kashan, iran, with an emphasis on land criteria using an imdpa model.different studies have assessed land degradation or desertificat...

Journal: :desert 0
m. karimpour reihan associate professor, international desert research center, university of tehran, tehran, iran s. feiznia professor, faculty of natural resources, university of tehran, karaj, iran a. salehpour jam ph.d. student, faculty of natural resources, university of tehran, karaj, iran m.k. kianian academic staff, university of semnan, semnan, iran

investigation of desertification trend needs understanding of phenomena creating changes singly or action and reaction together in the manner that these changes were ended up in land degradation. in investigation of pedological criterion onland degradation in quaternary rock units, first, a part of the rude-shoor watershed area was selected. after distinguishing target area, maps of slope class...

ژورنال: علوم آب و خاک 2018

In this study, to study the status of water resources degradation in Kashan region, Isfahan Province, eight indices including: drop in groundwater, water salinity, irrigation efficiency, Well-to-Qanat development ratio, the pumping time, shortage of water supplies for animals and humans and the water negative balance were selected according to previous studies conducted on desertification in Ir...

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...

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: :desert 2014
hassan khosravi gholamreza zehtabian hassan ahmadi hossein azarnivand

desertification in arid, semi-arid and dry sub-humid regions is a global environmental problem. considering theincreasing importance of desertification and its complexity, the necessity of giving attention to desertification criteria andindices is essential. models and methods such as medalus, unep-fao, and others have been proposed on local andnational scales. in this research, imdpa was selec...

Journal: :ecopersia 2011
seyed hedayat parvari ahmad pahlavanravi ali reza moghaddam nia abdolhamid dehvari davood parvari

several models have been developed to estimate land degradation rate and evaluate desertification severity. this study attempts to apply the medalus (mediterranean desertification and land use) model by considering existing conditions in the hamoun wetland, located in south-eastern iran. at first identification of the main factors affecting the desertification phenomenon was attempted, based on...

Journal: :Frontiers in Marine Science 2022

In the last decades, climate change and rapid urbanization due to development of coastal economy have led biodiversity loss fragmentation habitat in many zones. The presence protected areas cannot prevent progress land degradation. However, these are very important because they provide significant ecosystem services affect local tourism. With regard increasing adaptation strategies human pressu...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید