@article{Hamed Koohpayehzadeh Esfahani_Bithin Datta_2021, title={SIMULATION OF REACTIVE GEOCHEMICAL TRANSPORT PROCESSES IN CONTAMINATED AQUIFERS USING SURROGATE MODELS}, volume={8}, url={https://geomatejournal.com/geomate/article/view/1906}, abstractNote={<p>Transport of contaminant species undergoing chemical reactions in groundwater aquifers is a <br>complex physical and biochemical process. Simulating this transport process involves solving complex nonlinear <br>equations and requires huge computational time for a given aquifer study area. Development of optimal <br>remediation strategies in aquifers may require repeated solution of such complex numerical simulation models. <br>To overcome this computational limitation and improve the computational feasibility of large number of <br>repeated simulations, Genetic Programming based trained surrogate models are developed to approximately <br>simulate such complex transport processes. Transport process of acid mine drainage, a hazardous pollutant is <br>first simulated using a numerical simulated model: HYDROGEOCHEM 5.0 for a study area resembling a mine <br>site. Simulation model solution results for an illustrative contaminated aquifer site is then approximated by <br>training and testing a Genetic Programming (GP) based surrogate model. To decrease the total number of GP <br>formulations, the coordinates of observation locations are implemented as input data in the surrogate models. <br>Comparison of the surrogate models and numerical simulation results show that the surrogate models can <br>provide acceptable approximations of this complex transport process in contaminated groundwater aquifers.</p>}, number={15}, journal={GEOMATE Journal}, author={Hamed Koohpayehzadeh Esfahani and Bithin Datta}, year={2021}, month={Nov.}, pages={1190–1196} }