نتایج جستجو برای: technogenic desertification

تعداد نتایج: 2649  

2010
D. Kaneko N. B. Chang T. Kumakura

This paper aims to present an integrated approach for assessing the desertification processes on one hand and spot possible source locations of dust storm in Eurasian continent across the central Asia and northern China on the other hand. The authors have bu ilt Remote Sensing Environmental Monitor (RSEM) for Desertification Assessment System (DAS). Such an integrated sensing, monitoring and mo...

Journal: :The Iraqi Journal of Agricultural science 2021

Desertification is one of the phenomena that threatening environmental, economic, and social systems. This study aims to evaluate monitor desertification in central parts Iraq between Tigris Euphrates rivers through use remote sensing techniques geographic information The Normalized difference vegetation index NDVI crust CI were used, which applied two Landsat ETM + OLI satellite imagery during...

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: :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: :Atmosphere 2023

Desertification is a major environmental problem facing the world today, and climate change an important factor influencing desertification. This study investigates impact of changes in key factors on desertification based normalized difference vegetation index data, precipitation data evaporation from Inner Mongolia between 1982 2020 using correlation analysis, regression modelling, residual a...

2010
Sujith Ravi David D. Breshears Travis E. Huxman Paolo D'Odorico

a r t i c l e i n f o Land degradation in drylands is one of the major environmental issues of the 21st century particularly due to its impact on world food security and environmental quality. Climate change, shifts in vegetation composition, accelerated soil erosion processes, and disturbances have rendered these landscapes susceptible to rapid degradation that has important feedbacks on regio...

Journal: :desert 2012
m.s. ziaei r. masoudi m. ghodsi h. khosravi

desertification is more related to social and anthropogenic issues than natural causes and it becomes moreimportant over the time. human effects on desertification could be classified as direct and indirect factors. this studyhas focused on the effect of management factor, as a dominant case, on desertification of kashan region based onimdpa (imdpa: iranian model of desertification for potentia...

Journal: :journal of rangeland science 2011
armin mashayekhan farhad honardoust

desertification is one of the major issues threatening human communities. manymethods have been developed for assessment and mapping of desertification hazards. in thisresearch, multi-criteria evaluation method was used to investigate desertification process introuti watershed, golestan province, iran. at the first step, major desertification factors weredetermined by doing field surveys. they ...

Journal: :desert 0
m.s. ziaei associate professor, faculty of management, univ. of tehran, tehran, iran r. masoudi ph.d. student, faculty of natural resources, university of tehran, karaj, iran m. ghodsi ph.d. student, faculty of geography, university of tehran, tehran, iran h. khosravi ph.d. graduate, faculty of natural resources, university of tehran, karaj, iran

desertification is more related to social and anthropogenic issues than natural causes and it becomes moreimportant over the time. human effects on desertification could be classified as direct and indirect factors. this studyhas focused on the effect of management factor, as a dominant case, on desertification of kashan region based onimdpa (imdpa: iranian model of desertification for potentia...

2006
ZENG Xiaodong Robert E. DICKINSON Xubin ZENG Samuel S. P. SHEN

This paper investigates the hydrological interactions in the atmosphere-evegetation-soil system by using the bucket model and several new simplified intermediately complex models. The results of mathematical analysis and numerical simulations show that these models, despite their simplicity, can very clearly reveal the essential features of the rather complex hydrological system of atmosphere-e...

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