Use DRASTIC model to assess groundwater vulnerability of Ardabil plain aquifer.
Improve DRASTIC vulnerability index by artificial intelligence (AI): SVM, NF, GEP.
Use Supervised Intelligent Committee Machine (SICM) to improve on AI-techniques.
Use nitrate-N data to condition vulnerability indices (CVI) by SICM, SVM, NF, GEP.
Produce CVI maps of the study area by each model and SICM performs consistently.