نوع مقاله : مقاله کامل علمی پژوهشی
نویسندگان
دانشگاه علوم کشاورزی و منابع طبیعی گرگان
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Desertification is one of the greatest environmental challenges at the present time. The aim of this research, the presentation of desertification management plan is based on desertification risk map.Once produced, the work-unit map (geomorphological facies)of Sabzevar,a scoring process in each unit according to the MICD model and the desertification hazard map was done. The risk number was defined for each work-unit by multiplying desertification hazard classes to elements at risk and vulnerability of the elements at risk which obtained risk classes by classification of risk number. Then, management strategies and schedules were defined on the basis of the risk classes, field’s characteristics and important desertification indices in each work unit. These strategies introduced in the frame of 4 strategy and 10 desertification management plans and prepared the map of desertification management plan for Sabzevar.The results showed that: The largest share of the area(i.e. 37.44%)and the smallest(i.e. 0.08%)were devoted to the classes of IIb and IIIc respectively.The IIb class covered mostly clay pans, alluvial fans and also enclosed a large proportion of the Erg-e-Khartouran sand dunes. The effective indices in desertification of the IIb class were effective vegetation cover in soil and soil’s pressure resistance in arid conditions in the rangeland category and were soil surface traces of wind abrasion and sand accumulation in the areas of lack of land-use. According to the effective desertification indices in the area for the IIb class, it was proposed a managerial plan such as planting shrubs, revitalizing the vegetation stand and establishing wind breaks.
کلیدواژهها [English]
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