Cement, Energy and Environment

by artificial recharge which otherwise is lost to surface runoff. This artificial recharge mechanism which is a synonymous phenomenon of replenishment of groundwater resources is conducive to transforming the surface water into existing aquifer system within prevailing hydrogeological environment (Curtis 1998). Such augmentation will not only control the decline of water levels in parts of Durg but will also reduce the surface runoff which chokes the storm drains. Further, it will reduce the soil erosion and will increase the availability of water. Table 7 and Table 8 indicate the characteristics of water before and after the implementation of the rainwater harvesting system. Table No.7: Ground water quality of the tube wells in study area before implementation of rainwater harvesting I l rw1 I TW2 1 I I TW sl TW sl TW 71 TW sl TW91TW 10 I TW I I TW3 TW4 11 pH 7.92 7.60 7.43 7.90 8.12 8.02 7.96 8.34 8.41 8.51 8.62 TDS(mg/1} 490 690 500 620 420 440 511 430 760 810 860 TH as 260 340 320 380 280 240 300 280 400 460 480 CaCo3 Alkalinity (mg/1 240 220 190 200 220 260 260 260 240 240 300 asCaC03} Cl (mg/1) 116 110 98 96 106 98 110 100 11 6 120 126 F(mg/1} 0.62 0.65 0.60 0.31 0.66 0.68 0.81 0.64 0.62 0.64 0.80 Table No.8: Ground water quality of the tube wells in study area after implementation of rainwater harvesting I I TW1 I TW2 I TW 3 1Tw4 j rws I I pH 7.81 7.70 7.36 7.92 8.02 TDS(mg/1} 310 360 330 480 280 TH as 110 160 140 160 180 CaCo3 Alkalinity (mg/1 260 230 200 220 230 asCaC03) I Cl (mg/1) 80 78 80 84 76 F(mg/1) 0.38 0.39 0.50 0.24 0.42 Conclusion Based on the available hydro geological conditions and data, the roof-top rain water conservation through injection technique is found to be most suitable in the present site of investigation at Ahiwara Village in Durg District where the aquifer was deep. The water level depletion during summer is a very common I TW6 I TW7 I TW8 I TW9 I TW10 I TW 11 7.09 7.66 8.13 8.2 8.46 8.22 300 340 360 780 800 820 160 150 120 390 440 460 270 260 280 250 250 330 78 80 86 106 1110 118 0.44 0.62 0.40 0.59 0.58 0.75 problem throughout the country specially the villages where all the irrigation for the agriculture is dependent on the ground water. With encouraging results from the present experimentation, it is recommended that the scheme be extended for implementation in the surrounding villages as well as in the cities where large rooftop surface area will be available to conserve rain water so that it could be tapped judiciously when needed. 7