Abdelaziz, Shokry, Marwan Kheimi, Mohamed A. H. Eizeldin, and Hassan Safi Ahmed. 2025. “A Comparative Study of PCA and KPCA for Groundwater Quality Index Estimation”. Civil Engineering Journal 11 (11):4453-70. https://doi.org/10.28991/CEJ-2025-011-11-02.