Pourghasemi, H., Mohseni Saravi, M. (2017). Land-Subsidence Spatial Modeling Using Generalized Additive Model Data Mining Technique. , 30(4), 20-34. doi: 10.22092/wmej.2018.117083
Hamid Reza Pourghasemi; Mohsen Mohseni Saravi. "Land-Subsidence Spatial Modeling Using Generalized Additive Model Data Mining Technique". , 30, 4, 2017, 20-34. doi: 10.22092/wmej.2018.117083
Pourghasemi, H., Mohseni Saravi, M. (2017). 'Land-Subsidence Spatial Modeling Using Generalized Additive Model Data Mining Technique', , 30(4), pp. 20-34. doi: 10.22092/wmej.2018.117083
Pourghasemi, H., Mohseni Saravi, M. Land-Subsidence Spatial Modeling Using Generalized Additive Model Data Mining Technique. , 2017; 30(4): 20-34. doi: 10.22092/wmej.2018.117083

Land-Subsidence Spatial Modeling Using Generalized Additive Model Data Mining Technique

پژوهش های آبخیزداری
Article 3, Volume 30, Issue 4 - Serial Number 117, January 2018, Pages 20-34    PDF (1.07 M)
Document Type: Research
DOI: 10.22092/wmej.2018.117083
Authors
Hamid Reza Pourghasemi* 1; Mohsen Mohseni Saravi2
1Department of Natural Resources and Environmental Engineering, College of Agriculture, Shiraz University, Shiraz, Iran
2Retired Professor, College of Natural Resources, Tehran University
Abstract
Land-subsidence phenomenon is one of the geomorphologic hazards known in arid and semi-arid areas in recent years. The main objective of the present study is to provide a land-subsidence spatial modeling and its assessment using the generalized additive model data mining technique in Jiroft Plain, Kerman Province. Land-subsidence inventory map was prepared for the study area using extensive field surveys. Evidential Belief Function was used to investigate relationships between land-subsidence and 10 effective factors including slope percentage, aspect, elevation, lithological units, distance from river, piezometric wells data, land use, plan curvature, topographic wetness index, and distance from fault, and the weight of each factor class was determined.  Results of the relationships between land-subsidence and effective factors indicated that most of the subsidences of the region are occurred in low slopes (0-2%), flat and smooth aspects, small distance from a river (>50m), large  distance from a fault (>4000 m), also in the third group lithological units (rhythetic dyke and rhyodity and dark green tuff), shrubbery land use type, convex slopes with high topographic wetness index (>12), and receding in groundwater level. A land-subsidence susceptibility zonation map was created using the GAM in statistical R statistical software for the study area. Results of validation of generalized additive model evaluation using 30% of unused points in the modeling process, and the receiver operating characteristic (ROC) showed that the land-subsidence susceptibility map prepared by Generalized Additive Model had a high accuracy (81.20%). Therefore, the map might be helpful for optimizing management of water resources and preventing the re-occurrence of this phenomenon in the area. Results of ranking effective factors from the generalized additive model showed that elevation, land use, and aspect were in the highest orders in land-subsidence occurrences.
Keywords
Evidential Belief Function; Generalized Additive Model; Jiroft Plain; Land-subsidence; Spatial modeling
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