Padma Multipurpose Bridge Project

2009 12 42 48 392 462014 60 169 230 1,227 1932020 105 289 419 2,392 3562025 139 388 581 3,691 5242030 190 550 840 6,011 8142035 232 681 1,050 7,820 1,043Table 7-23: GHG emission from the Project interventionYearEstimated Annual Greenhouse Gas Emission (ton)CO 2 CH 4 N 2 O NMVOC Total(CO 2 eq)2009 7,021 2.42 0.18 138.57 7,6902014 50,586 15.23 1.38 800.40 54,5782020 113,033 34.77 3.05 1,868.40 122,2832025 158,661 52.20 4.14 2,994.97 173,1782030 230,920 81.89 5.77 5,012.53 254,7362036 301,647 110.16 7.40 6,898.82 334,203Note: Total CO 2 eq is estimated based on the Global Warming Potential for 100 years data of IPCC2007Source: The Consultant’s Estimate, 2009.108. Noise quality: Noise quality along the Project road will be increased due to the increase in thetraffic volumes. Predicted noise levels along the road RoW during O/M stage with and without treesare presented in Table 7-24.Table 7-24: Predicted noise levels (dBA) near the sensitive areas along the ProjectDistance from Edge of ROW (m)JanjiraMawaYear 0 25 50 75 100 0 25 50 75 1002009 52.1 49.3 47.2 45.5 43.9 51.9 49.3 47.3 45.7 44.0No TreesWithTrees2014 60.9 58.0 55.9 54.2 52.6 60.6 58.0 56.0 54.4 52.72025 64.5 61.9 59.9 58.3 56.8 64.7 61.9 59.8 58.1 56.42036 68.1 65.3 63.2 61.5 60.0 67.9 65.3 63.4 61.8 60.12025 56.6 56.5 55.1 54.2 53.5 58.1 57.2 56.3 54.7 53.82036 59.2 59.0 57.7 56.8 56.1 60.7 59.7 58.8 57.3 56.3109. It can be seen from the Table above that the roadside receptors will be exposed to high noiselevel; however the noise levels in most cases are within the acceptable limit with tree barriers exceptthe year 2036 at the edge of the ROW for noise standard for the night time (60dB). The noise forecastis for the day time traffic with the higher AADT, the night time traffic will be lower than the day-timetraffic and hence the lower noise level. However, the impact will be of transition in nature untilroadside green areas are fully developed which will require couple of years. The impact will reducesubstantially after the roadside plantation that will interfere with the noise and also will work as noisebarrier to the surroundings (Figure 7-7).7-30