Padma Multipurpose Bridge Project

16. Study possible impacts on river morphology, various environmental parameters,local river transport, irrigation and flooding due to the river training works. Soil erosion and bank stability17. Analysis of soil characteristics, moisture contents, vegetation cover etc., inconjunction with the above activity, to predict possible soil and bank erosion to projectactivities. Terrestrial flora and fauna18. Investigation of the composition of plant species, migratory and local birds, aquatichabitats (Hilsa, dolphins, etc.), terrestrial fauna including wildlife in the Project area.Attention should be paid to the distribution of protected plant and animal/birds species inorder to ensure favorable conservation status for these species. Provision of a WildlifeMuseum should be studied at Janjira Site similar to the one of Bangabandhu Bridge site. Charland in upstream and downstream19. Investigation on Charland in upstream and downstream in terms of flooding,fisheries, agriculture production etc. Wetland habitats and aquatic flora and fauna20. Investigations of occurrence of species (flora and fauna) in the identified wetlandsof the project area and assessing the potential influence of the project activities on them.Attention should be paid to the distribution of protected species in order to ensurefavorable conservation status for these species. Sensitive Areas21. Locate sensitive areas, showing the boundaries and buffer zones in the projectinfluence area. This is to ensure that the locations of sensitive areas and project area aresufficiently distant enough to maintain harmonization and avoid any potential socialdisturbances. Traffic flow22. Traffic counts and historical traffic flow to predict the future traffic growth and theload on the project Bridge and its Approach roads. Air quality and noise level23. Collection and analysis of air (SPM, Pb, CO, NOx, SO2, dust) and noise qualitythroughout the project area. Water Quality24. Collection and analysis of water quality (DO, BOD, COD, turbidity, pH, TOC, TDS,TSS, EC, As, Coliform, Hardness, oil and grease) of the major water sources within andalong the project area. Riverbed Dredged Material25. Collection and analysis of the chemical properties of dredged materials. Assessthe presence of toxic and heavy metals like As, Pb, Cd, Cr, Hg, etc. Evaluate theenvironmental impact of such contaminants on the end-use and environmental impacts ofspoiled dredged materials. Sand mine, Quarry and Borrow Sites26. Estimation of effects on the ecological resources in the area connected to sandmining, quarry and barrow pit operations needed for construction.27. Carryout a study on the potential impacts due to various construction methods (ifany).5.3 Analysis of Alternatives and Economic Assessment5.3.1 Analysis of Alternative Options28. Comparative environmental analysis of all available project alignments and variousbridge design and river training options including “No Project” scenario.5.3.2 Economic Assessment29. Economic analysis of all alternatives in accordance with ADB’s Handbook onEconomic Evaluation of Environmental Impacts for: (i) costs and benefits of environmentalimpacts; (ii) costs, benefits, and cost-effectiveness of mitigation measures; and (iii)A1-22