نتایج جستجو برای: desertification hazard
تعداد نتایج: 66510 فیلتر نتایج به سال:
There is potential for synergy between the global environmental conventions on climate change, biodiversity and desertification: changes in land management and land use undertaken to reduce net greenhouse gas emissions can simultaneously deliver positive outcomes for conservation of biodiversity, and mitigation of desertification and land degradation. However, while there can be complementariti...
Land degradation in arid, semi-arid and sub-humid areas, leads to desertification and land degradation is a concept that refers to any reduction of soil potentials. In Iran, that 85 percent of its area is classified in arid and semi-arid climates, and one percent per annum growth rate of desertification and its increasing trends, finding ways to evaluate this phenomenon and its caus...
One of the most important calamities that affect the arid and semi- arid regions and is taken into account as threatening factors for human- life and destroying the natural resources is desertification, so recognizing and forecasting this phenomenon is very important. Desertification is a complex phenomenon, which as environmental, socio-economical, and cultural impacts on natural resources. In...
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...
Desertification is a major environmental hazard that the world facing today and threat in arid semi-arid regions. This research was carried out Dukku Local Government Area, Gombe State to assess rate of desert encroachment study area. The based on satellite imagery using GIS analysis. multi-temporal acquired from Land Sat images 2000TM, Landsat image ETM 2010 2020 OLI vegetation cover. NDVI (No...
climate is the most important factor which control desertification .in order to detect climate changes in desert zones, time trend analysis is applied to extreme indices in kashan station using extreme climate index software (ecis). results show significant trends in extreme indices during the past decade 1995-2004 and the pronounced warming is associated with a negative trend in cold extremes....
undoubtly, land degradation causes apparent decrease of natural resources potential which are highly linked to desertification. different countries and also international organization have realized a great number of projects to combat desertification. unfortunately these projects have not reach to their goals. the experiences shows that the reason of these unsuccessful works is lack of consider...
knowledge of behavior climatic indexes can be help to planning future programs bahabad study area in the eastern part of the province of yazd with a hot and dry climate, high potential evapotranspiration and low rainfall has a high potential for desertification. the aim of this research is evaluation of classification intensity by imdpa model with emphasis to climate criteria. the indices inclu...
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