ارزيابي حساسيت و پهنه‌بندي خطر زمين‌لغزش در قطعۀ 5 راه آهن اردبيل – ميانه با استفاده از روش‌هاي تحليل سلسله مراتبي فازي، مثلت سلسله مراتبي فولر و منطق فازي

Evaluation Landslide Hazard Impacts on the 5th Segment of Ardebil-Mianeh Railroad based on Fuzzy-AHP, Fooler Hierarchical Triangle and Fuzzy logic Methods in GIS Environment

هدف اصلي اين تحقيق، توليد نقشه هاي حساسيت زمين لغزش براي محدوده قطعه 5 راه آهن اردبيل ميانه و تاثير آن بر شريان هاي حياتي و ثانيا تجزيه و تحليل مهم‌ترين عوامل تاثيرگذار در افزايش خطر زمين‌لغزش است. در اين پژوهش از سه روش منطق فازي، مثلث سلسله مراتبي فولر و تحليل سلسله مراتبي فازي (F-AHP) استفاده شده است. روش هاي مذكور از روش هاي تحليل تصميم گيري چندمعياره به‌منظور ارزيابي علمي نواحي مستعد زمين لغزش در محدوده قطعه 5 راه آهن اردبيل ميانه است. براي انجام تحقيق معيارهاي اصلي در قالب لايه‌هاي اطلاعاتي شناسايي شده و براي تلفيق استفاده شدند. سپس براي تعيين ميزان استعداد محدوده بررسي شده نسبت به رخداد زمين لغزش براساس روش منطق فازي، مثلث سلسله مراتبي فولر و سلسله مراتبي فازي (F-AHP) اقدام به پهنه بندي شده است. نهايتا، عملكرد روش هاي مختلف در توليد نقشه هاي حساسيت زمين لغزش با استفاده از شاخص هاي صحت‌سنجي "جمع مطلوبيت "، "درصد منطقه بحراني" و منحني مشخصه عملكرد سيستم با يك‌ديگر مقايسه شد تا روش مطلوب و كاربردي براي محدوده قطعه 5 راه آهن اردبيل ميانه به‌منظور مديريت خطر زمين لغزش تعيين شود. در نهايت با تلفيق داده‌اي متناسب با وزن‌هاي استخراج شده، نسبت به تهيه نقشه پهنه‌بندي زمين‌لغزش اقدام شد. نتايج تحقيق حاضر در شناسايي نسبت محاطرات محيطي و آسيب‌پذيري اين محور تبادلاتي نقش مهمي داشته و مي‌تواند راهگشاي برنامه ريزان و تصميم‌گيران براي كاهش نسبت خسارات و مديريت بحران استفاده شود.

Landslide is known as one of major natural hazards. Landslide susceptibility mapping is known as efficient approach to mitigate the future hazard and reduce the impact of landslide hazards. The main objective of this research is to apply GIS spatial decision making systems for landslide hazard mapping in the 5th segment of Ardebil-Mianeh railroad. Evaluation of the landslide criteria mapping and their relevancy for landslide hazard can be also considered. To achieve the research objectives, an integrated approach of Fuzzy-Analytic Hierarchy Process (AHP), Fooler Hierarchical Triangle and Fuzzy logic methods were employed in GIS Environment. Material and methods Within this research, we also aimed to apply GIS spatial decision making systems and in particular GIS multi criteria decision analysis which are available in Arc GIS and Idrisi softwares. We have identified 8 casual factors (including: density of vegetation, land use, faults desistance, distance from rivers, distance from roads, slope, aspect, geology) based on literature review. Accordingly, these layers were prepared in GIS dataset by means of applying all GIS ready, editing and topology steps. The criterion weighting was established based F-AHP approach. The criteria weights was derived and rank of each criterion was obtained. Accordingly, the landslide susceptible zones were identified using GIS-MCDA approaches. Results and discussion Finally the functionality of each method was validated against known landslide locations. This step was applied to identify most efficient method for landslide mapping. According to the results and based on the values derived from Qs, P, and AUC, the accuracy of fuzzy method was accordingly about 0.33, 0.74 and 0.76, respectively. In context of Fuzz-AHP the accuracy of 1.08, 0.88 and 0.94 were obtained. While, the accuracy of Fooler Hierarchical Triangle were obtained 0.78, 0.84 and 0.91, accordingly. Conclusion As results indicated integration of Fuzzy-AHP represented more accurate results. Results of this research are great of important for future research in context of methodological issues for GIScience by means of identifying most efficient methods and techniques for variety of applications such landslide mapping, suitability assessment, site selection and in all for any GIS-MCDA application.