Landslide hazard zonation studies of Asaluyeh region using AHP and Fuzzy Logic Methods

سال انتشار: 1398
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 360

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شناسه ملی سند علمی:

ICRARE06_011

تاریخ نمایه سازی: 6 بهمن 1398

چکیده مقاله:

In this paper, a map zonation of landslide hazard and mass movements risks at the Asaluyeh area (South of Iran), using Analysis Hierarchical Process (AHP) and FuzzyLogic approaches was performed based on the parameters of slope, slope direction, elevation, rivers, precipitation, faults, roads, geological unit and land usages. Foroptimization of the various parameters effect that would lead to landslide occurrence, the effect dimensions of each of these layers were applied and the zonation of landslide risk in the region was mapped. The AHP operations were attributed with effect numbers between 1 and 9 in accordance with their weight. Then by pairwise comparison of the parameters, the slope of effect of these functions was determined. According to the fault and lithology parameters the most effective layer and human functions including road and land usage are of second priority, topography functions including slope direction, and height are of third level of significance whilst the hydrology function is ranked fourth and thus being in consistency with the land reality. The results illustrated that the Analysis Hierarchical Process (AHP) was appropriate for landslide zonation in this dense vegetation and with the natural geography of the area is consistent. In map zonation of landslide risk using fuzzy membership variants and fuzzy logic all the data were stored in ILWIS software and when the values and fuzzy membership variants were determined, the fuzzy analysis was performed by IDRISI software. In this research different fuzzy operators (And, Or, Sum, Product and Gamma) were used. According to the results, the gamma operator produced the best map of sensitivity to landslide risk in the region. The average depth of the investigated landslides is about 6 m which illustrates the shallow depth of the slide layers and the significant effect of lithology at depth and thickness of the sliding domain.

کلیدواژه ها:

Fuzzy logic ، Analysis Hierarchy Process (AHP) ، Asaluyeh ، Landslide zonation ، Pair wise comparison

نویسندگان