A comparison of fuzzy logic and TOPSIS methods for landfill site selection according to field visits, engineering geology approach and geotechnical experiments (case study: Rudbar County, Iran)

Abstract

The present study evaluated and selected the best location among susceptible landfill sites in Rudbar County using 27 criteria, as the maximum effective criteria, in the decision-making process. The emergence and comparison between the two methods of fuzzy and Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) with an engineering–geological approach have been conducted to obtain the best results. In this regard, inappropriate regions for landfill construction have been restricted after the conflation of two maps based on the restriction criteria. Then, the direction of prevailing winds and proper area for landfill construction was investigated for a 20-year perspective, and the regions that had more than 35-hectare area and were not located in the direction of the prevailing winds have been identified as responsive sites for landfill construction. Ultimately, selected susceptible regions were prioritized separately based on the TOPSIS and fuzzy methods. To ascertain the accuracy of the results and the reality of the resulted models, complementary field studies, geotechnical digging, and engineering–geological experiments have been used as verification parameters. According to the results of the verification, the fuzzy model having maximum matches with the verified data has been suggested for prioritizing susceptible regions.

Fuzzy or Non-Fuzzy? A Comparison between Fuzzy Logic-Based Vulnerability Mapping and DRASTIC Approach Using a Numerical Model. A Case Study from Qatar

“…The higher value of the membership function (i.e., 1) the more likelihood the class contribution will be. Several membership functions exist [39]. The most common ones are: The available functions are fuzzy Gaussian, fuzzy Large, fuzzy Linear, fuzzy MSLarge, fuzzy MSSmall, fuzzy Near, and fuzzy Small.…”

Investigation and zoning of geo-environmental risk around the western edge of Khareshk village's oil transmission line, Iran

“…To aggregate maps of weighted criteria, various methods are applied. In this study, the "GAMMA 0.9" fuzzy overlay operation was used because some researchers such as Lewis et al (2014), Mohebbi Tafreshi et al (2018), Baharvand et al (2020, Klai et al (2020), Mortazavi Ghazifard (2020), andNakhaei et al (2021) believe that it has a high level of accuracy than other "GAMMA" fuzzy overlay operations.…”

Optimal Landfill Site Selection for Solid Waste of Three Municipalities Based on Boolean and Fuzzy Methods: A Case Study in Kermanshah Province, Iran

“…According to the literature review, the most common methods for landfill site selection, approaching multi-criteria decision (MCDM) are weighted linear combination (WLC), ordered weighted average (OWA), analytic hierarchy process (AHP) [39][40][41][42], fuzzy analytic hierarchy process (F-AHP) [6,29,43,44], TODIM, fuzzy TODIM [45], analytic network process (ANP) [26], fuzzy analytical network process (F-ANP) [16], and best-worst method (BWM) [1,10]. They all use GIS to combine spatial data, such as maps, aerial photographs, and satellite imagery with quantitative and qualitative databases, to select an optimal landfill that has the least negative impact on the environment.…”