Fig. 1. (a) Location of the study area; (b) Elevation; (c) Strata, hydrogeology of shallow pore water and groundwater samples; (d) Land-use types; (e) A-B hydrogeological profile. Fig. 2. Calculation process of EWQI. Fig. 3. Calculation process of PCA-APCS-MLR. Fig. 4. Piper diagram of the major ion chemistry of water samples. Fig. 5. Spatial distribution of groundwater quality evaluation in the study area. Fig. 6. Assessment results of groundwater suitability for irrigation quality assessment: (a) USSL diagrams; (b) Wilcox diagrams. Fig. 7. Spatial distribution of non-carcinogenic health risks: (a) Non-carcinogenic health risks for adults; (b) Non-carcinogenic health risks for children. Fig. 8.
Cumulative probability of predicted non-carcinogenic risk: (a) HQ(F-); (b) HQ(Mn); (c) HQ (NO2 -); (d) HQ (NO3 -); (e) HI. Fig. 9. Sensitivity analysis of non-carcinogenic risk for adults and children: (a) HQ; (F-) (b) HQ(Mn); (c) HQ (NO2 -); (d) HQ (NO3 -); (e) HI. Fig. 10. SOM-K-means clustering results: (a) Cluster network map; (b) SOM map; (c) Spatial cluster distribution map. Fig. 11. Analysis diagram of pollution source based on PCA-APCS-MLR: (a) Lithotripsy diagram and contribution rate of cumulative total variance; (b) Correlation analysis diagram; (c) Rotation factor loading matrix; (d) Contribution of pollution sources to groundwater components; (e) Average percentile contribution of different pollution sources in the study area. Fig. 12. (a, b) Gibbs diagram; (c, b) Ion ratio diagram. Fig. 13. Scatter plot of the major ion ratios in groundwater: (a) Cl- versus Na+; (b) SO4 2- versus Ca2+; (c) SO4 2-+ HCO3 - versus Ca2++ Mg2+; (d) F- versus SI (Fluorite); (e) Relationship plot of Na+ +Mg2+ -SO4 2--HCO3 -and Na+ +K+ -Cl-; (f)Chlor-alkali index (CAI) graph. |