Effects of national highway expansion activities on physicochemical characteristics of surface water along NH-22, India
Shelly Banyal, RK Aggarwal, SK Bhardwaj
The development of highway infrastructure contributes to environmental contamination, specifically surface water bodies in close proximity to the roads. A study was conducted to assess the effects of road expansion on physicochemical parameters of surface water by collecting 72 samples during Pre-monsoon, monsoon and post-monsoon seasons from 4 study sites. The water quality parameters such as pH, EC, TDS, Turbidity, BOD, COD, Cl- and NO-3 were analysed. The water was found to be slightly alkaline in nature. The mean values of analytes were: pH (7.40,7.20,7.24), EC (0.28 ds m-1,0.23ds m-1,0.25 ds m-1), Turbidity (3.15NTU, 3.53NTU, 2.96NTU), TDS ( 144.67 mgl-1, 110.9367 mgl-1, 129.69 mgl-1), BOD (2.57 mgl-1, 2.3767 mgl-1, 2.12 mgl-1), COD (48.20 mgl-1,42.27 mgl-1,35.05 mgl-1), Cl- ( 27.12 mgl-1, 21.25 mgl-1, 19.46 mgl-1) and No-3 ( 3.62 mgl-1, 4.26 mgl-1, 4.22 mgl-1) recorded during pre-monsoon, monsoon and post-monsoon seasons respectively. The turbidity has highly significant positive correlation with BOD (r = 0.844, p < 0.01), COD (r= 0.730, p < 0.010) and Cl- (r = 0.813, p < 0.01). The concentration of pH, EC, TDS, BOD, COD and Cl- was higher during pre-monsoon whereas turbidity and No-3 were higher in monsoon. The highway expansion activities have started affecting the surface water quality henceforth, highway construction impacted parameters can be considered as potential indicator for biological relevance of surface water bodies.
Shelly Banyal, RK Aggarwal, SK Bhardwaj. Effects of national highway expansion activities on physicochemical characteristics of surface water along NH-22, India. International Journal of Ecology and Environmental Sciences. 2020; 2(4): 347-354.