Padma Multipurpose Bridge Project

3. Environmental and SocialAspects2.4 RiverTraining WorkComparative ItemsGuide bund worksAdditional RTWFlood plain works(ComparativeAdvantage)3.1 Natural environmentalimpactsSite-1: Paturia-GoalundoNo significantdifferenceLess works anticipatedLess works anticipatedSite-2: Dohar –CharbhadrasanNo significantdifferenceMore worksanticipatedMore worksanticipatedSite-3: Mawa-Janjira Site-4: Chandpur -BhedarganjNo significant differenceLess works anticipatedLess works anticipatedNo significant differenceMore works anticipatedMore works anticipatedAdvantage (***) Disadvantage (*) Advantage (***) Disadvantage (*)Less risk of erosionand siltation, impacton water bodies andfisheries. (**)3.2 Social impacts More loss ofhomestead andincome(**)(ComparativeAdvantage)Greater risk of erosionand siltation, moreimpact on waterbodies and fisheries.(*)Highest landacquisition andagricultural losses(*)Less risk of erosion andsiltation, impact on waterbodies and fisheries.(**)More loss of homestead,income, and split ofcommunities(**)Greater risk of erosionand siltation, moreimpact on waterbodies and fisheries.(*)Economic activities arehigher, morebusiness loss(*)Advantage Disadvantage Advantage DisadvantageOVERALL EVALUATION Advantage Disadvantage Advantage DisadvantageProject Cost (reference Less costly Much costly Less costly Much costlyonly)Source: Feasibility Study Report, JICA 2005Notes:a) Evaluation: Evaluation was made first with marks “*** (very good)”, “** (good)”, and “* (fair)” for respective items under each aspect. Then, the evaluation with terms of“Advantage” or “Disadvantage” for respective aspects was given based on the marks given to each item. Finally two alternative sites for further study were selected as aresult of overall evaluation based on the evaluation results by aspects. The site marked as “Disadvantage” is judged relatively disadvantageous among the four sites, but thisdoes not mean the site is not appropriate for bridge crossing.b) Definitions and explanations of terms:1. Max. River extent: Width between extra limit of left and right banks during past 30 years.2. Trip length (TL) is the total length of road that vehicles must travel to reach their final destination when routed through a particular bridge location. The product of thetotal distance and the number of vehicles using the routes provides the weighted vehicle kilometer (vkm) value. The higher values of vkm are disadvantageous as theymean comparatively longer traveling distances are necessary.3. Travel time (TT) is the time to reach final destinations when routed through a particular bridge location, and the higher values represent longer times to reachdestinations.6-6