TY - JOUR ID - 77492 TI - Modeling of land subsidence due to groundwater overexploitation using elastoplastic Mohr-Coulomb model in Arak plain, Iran JO - Geopersia JA - GEOPE LA - en SN - 2228-7817 AU - Jahangir, Mohammad Hossein AU - Kosravi, Zahra AU - Sarrafha, Hamid AD - Department of environment and renewable energies, Faculty of new sciences & technologies, University of Tehran, Tehran, Iran Y1 - 2021 PY - 2021 VL - 11 IS - 1 SP - 131 EP - 151 KW - subsidence KW - Numerical Modeling KW - Elastoplastic Mohr-Coulomb Model KW - Underground Water Level KW - Iran DO - 10.22059/geope.2020.294079.648519 N2 - Land subsidence due to groundwater overexploitation has been considered among the natural hazardsfor the last decades. Accordingly, a growing global concern has been forwarded towards this issueregarding its measurement, prediction, and prevention. In addition to measurement techniques,mathematical and numerical methods could be used for subsidence modelling and its prediction viaappropriate software tools and modelling frameworks. As a part of the global trend, groundwateroverexploitation and the subsequent land subsidence has lately become a major environmental threat inIran. In this paper, the land subsidence across Arak plain, a relatively vast plain located in central Iran,caused by groundwater level drop is calculated using Mohr-Coulomb elastoplastic model, which is astructural soil modelling framework. Also, a modified finite element method is applied via PLAXIS 2Dcommercial software for acquiring further insight and verifying the results from the Mohr-Coulombmodel. Accordingly, five borehole stations were considered across the Arak plain, namely Gavkhaneh,Ebrahimabad, Safarabad, Amanabad, and MojedabadKohneh and the mentioned model is applied ateach borehole. It was revealed that the axial strain across the plain has reached extreme negative valueof -0.190 in 2014, which shows severe soil compaction. Also, the volumetric strain rate reached aminimum value of -0.083 in 2014. The acquired results from the applied Mohr-Coulomb model showeda subsidence average value of 26.6 cm for 17.85 m of groundwater level drop during 1991-2014. Also,the lowest aggregated subsidence value until 2014 was observed at Safarabad station being 0.2 cm, whileits maximum value was observed at Gavkhaneh station being 88.75 cm. These was a 9.20% of differencebetween the average value acquired by Mohr-Coulomb model and FEM, which, considering theuncertainty in measured input data verifies the reliability of the model. The research findings prove thecapability of the Mohr-Coulomb model in modelling land subsidence.  UR - https://geopersia.ut.ac.ir/article_77492.html L1 - https://geopersia.ut.ac.ir/article_77492_61e50393bd9b126d0a7ddaf6a20852f1.pdf ER -