5. Conclusions
The overall findings of the present study were summarized below:
1. SAR values clearly demonstrates that the seasonal effect on the chemical
parameters is significant.
2. Layerwise study of SAR demonstrates that all the wells in the 1 st layer (viz., wells
at about a distance of 500m from River Noyyal) are highly polluted since the SAR
values are very high in this region.
3. The effect of percolation is not significant in the 3 rd to 5 th layer in the study area
since these layers fall away (1500 to 2500m) from River Noyyal.
4. Results of Wilcox diagram clearly indicates that all the wells belonging to the 1 st
layer is not suitable for irrigation but the wells pertaining to 2nd layer illustrates
partly permissible to irrigation
5. Wilcox results demonstrate that wells belonging to 4 th and 5th layers are very
much unsuitable for irrigation.
6. The influence of polluted river water to the groundwater aquifers is highly
significant about 1 km from River Noyyal on both north and south directions.