نتایج جستجو برای: desertification intensity

تعداد نتایج: 182836  

Journal: :desert 2013
m.h. sadeghi ravesh h. ahmadi gh.r. zehtabian m. tahmoures

due to increasing importance of desertification challenges and its consequences the necessity of sustainabledevelopment achievement in arid and semi-arid regions is essential in order to avoid limited sources asting, increase the efficiency of controlling, reclamation and restoration projects of natural areas. based on the iterature review, it has been recognized that combating desertification ...

Ali Akbar Fakhireh Ali Reza Shahryari Gholam Reza Rahdari, Hassan Khosravi Mohammad Reza Rahdari

Today one of the ecological crisis is the phenomenon of desertification that affecting the world. Desertification is more related to social and anthropogenic issues than natural causes and it becomes more important over the time. Monitoringis the systematic collection and analysis of information as a project progresses. In this study, using AHP method and GIS techniques has been to assess deser...

Journal: :desert 0
gh. chamanpira senior expert, agriculture and natural resources research center of lorestan province, khoram abad, iran gh.r. zehtabian professor, faculty of natural resources, university of tehran, karaj, iran ahmadi h. professor, science and research branch, islamic azad university, tehran, iran m. ekhtesasi ekhtesasi

in recent years, the topic of desertification has been discussed in different ways in scientific areas. this event occurred globally, regionally and nationally and many steps were taken to stop it. desertification is challenged universally and its destructive effects are unavoidable and its consequences do endanger the life of inhabitants. the identification of sensitive regions and prevention ...

Journal: :آب و خاک 0
مرتضی اکبری احسان رعنایی سید حمزه بدیعی نامقی

abstract desertification could cause reduction of the ecological and biological potential of land which may occur both naturally and artificially. identifying and evaluating the effective factors in development of desertification is very important for better management of land. the aim of this research is to evaluate the sensitive input parameters in the desertification condition by using of ar...

Journal: :desert 2013
m. tahmoures m. jafari h. ahmadi m. naghiloo

desertification is recognized as a serious environmental threat in iran because of its climatic-geomorphologicconditions. desertification and land degradation in arid, semi-arid, and dry sub-humid regions, is a globalenvironmental problem. accurate assessment of the status and trend of desertification is instrumental in developingglobal strategies to prevent and reverse this problem. the goal o...

Introduction: More than 168 countries face the phenomenon of land degradation and desertification. Land use changing and more exploitation of nature's potential in arid and semiarid ecosystems over the past three decades have increased the trend of desertification phenomena in these ecosystems. Deserts are dynamic ecosystems that are constantly evolving. Deserts are dynamic ecosystems that are ...

Journal: Desert 2012
Gh.R. Zehtabian H. Ahmadi M. Tahmoures M.H. Sadeghi Ravesh

Due to increasing importance of desertification challenges and its consequences the necessity of sustainabledevelopment achievement in arid and semi-arid regions is essential in order to avoid limited sources asting, increase the efficiency of controlling, reclamation and restoration projects of natural areas. Based on the iterature review, it has been recognized that combating desertification ...

Journal: :desert 2013
gh. chamanpira gh.r. zehtabian ahmadi h. m. ekhtesasi

in recent years, the topic of desertification has been discussed in different ways in scientific areas. this event occurred globally, regionally and nationally and many steps were taken to stop it. desertification is challenged universally and its destructive effects are unavoidable and its consequences do endanger the life of inhabitants. the identification of sensitive regions and prevention ...

خسروی, حسن, راهداری, غلام رضا, راهداری, محمدرضا, شهریاری, علی رضا, فخیره, اکبر,

Land degradation are known in dry lands as a physical - environmental and economic - social phenomenon that eventually lead to declining of soil fertility. Several processes are caused this as well as one of them is desertification. In this research attempt to modeling the process of desertification with use IMDPA model in a ten years period in southeast coastal of Iran desert, the first. Final...

Journal: :international journal of advanced biological and biomedical research 2013
gholam reza rahdari mohammad reza rahdari ali akbar fakhireh ali reza shahryari hassan khosravi

today one of the ecological crisis is the phenomenon of desertification that affecting the world. desertification is more related to social and anthropogenic issues than natural causes and it becomes more important over the time. monitoringis the systematic collection and analysis of information as a project progresses. in this study, using ahp method and gis techniques has been to assess deser...

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