فنون تحليل چند معياره مكاني، تصميم، تحليل سلسله مراتبي و استانداردسازي فازي در تعيين بحراني ترين چراگاههاي حوزه آبخيز

Multicriteria, decision, analytic hierarchy process and fuzzy standardization techniques to determine the most critical rangelands in watershed

One of vital choices in rangeland planning is finding the most critical pastures set those places in priority. Thus for Hable Roud watershed was located east of Damavand (Ir an), model of range spatial factors composition (slope, rainfall, A UM, range trend, range condition), spatial critical factors which domestic traffic is high near them and subsequently grazing pressure is high around those places (proximity to road , to village, to river, to well and to spring) and spatial constr aints (slope, geomorphology, land use, road, riv er, village) was designed. Fuzzy standardization for factors and con straints in value range 0 to 1 by goal or maximum and linear benefit or cost functions was done. Normal weights of factors with pairwise with prefer values in 1 to 9 and inc onsistency rat io less than 0.1 from analytic hierarchy process (AHP) method was determined. Compositing of these layers was done by multi criteria analysis (MCA). Composite index map (CIM) in value range 0 to 1 wa s made. Considering thi s CIM and its pixel value histogram is determining the most cr itical rangelands in watershed with 150 ha area for priority plans accuracy. Using this model in other districts cau se to optimum data exploitation and can saving time and money.