Estimation of Subsidence Potential Index Using the PCSM Method and Fuzzy Model in Ardabil Plain Aquifer

Recently, land subsidence due to natural and human factors changed to catastrophic destruction for the residential, agricultural and industrial areas. In this study, the high potential subsidence areas of Ardabil plain were identified to control and manage this phenomenon. Thus, the seven effective parameters on the subsidence were rated and weighted and the subsidence potential index (SPI) was calculated for study area. The SPI value for the Ardabil Plain was obtained between 80 and 154. Then the results of this method were verified by occurred subsidence which is obtained through INSAR image analysis for the study area. Although the results are acceptable but to increase the framework efficiency and accuracy of results, the fuzzy model adopted to optimize this framework. In this way, seven effective parameters on the SPI were used as the input of the FL model and the value of the corrected SPI by obtained observed subsidence from INSAR images was defined as the output of the model. The results of this method showed that the southern and southeastern parts of the plain have the high subsidence potential.