Landslide hazard and risk zonation in central Alborz

• Main Authors: Shari`at Ja`fari, Mohsen, Ghayuriyan, Ja`far, Jalali, Nader, Ghaffari, A`li Reza
• Format: Publication
• Language: Persian
• Published: Karaj ( Iran ) Soil Conservation and Watershed Management Reseach Institute 2006
• Subjects: ANALISIS DE RIESGOS; ANALYSE DU RISQUE; Central Alborz; CONTROL DE LA EROSION; DESLIZAMIENTO DE TIERRAS; EROSION; EROSION CONTROL; GEOGRAPHICAL INFORMATION SYSTEMS; GEOLOGIA; GEOLOGIE; GEOLOGY; GLISSEMENT DE TERRAIN; LANDSLIDES; LOSSES; LUTTE ANTIEROSION; PERDIDAS; PERTE; RISK ANALYSIS; SISTEMAS DE INFORMACION GEOGRAFICA; SYSTEME D'INFORMATION GEOGRAPHIQUE

One noticeable part of hazards and losses of natural disasters in world has been attributed to landslides. Landslide comprehensive management and the other natural disasters is one of the effective elements in reduction of hazards and losses in catchments. Landslide hazard and risk analysis is efficiency scheme in comprehensive management of catchments. In this research plane, that achieved for first one in central Alborz in Iran, risk analysis that is algebraic product of hazard and vulnerability, carry out using a set of fuzzy operators in tow generally different condition. In the framework of risk assessment project, the results of landslide hazard analysis evaluated by tow index term, mentioned the density ratio (Dr) and quality sum (Qs). Whit reference to results, the above-mentioned methods have more suitable efficiency in distinguish of upper classes of hazard. In comparison, Quality sum of fuzzy algebraic production operator is 1.9 more than fuzzy algebraic sum. Outcomes of a notable range of operators (such as gamma operators) tack place between of tow mentioned models. The judgment about the better operator depending on obviously to aims of projects in any catchment.