Tram is one of the eco-friendly new urban transportation, nevertheless, tram construction project is being delayed due to low economic in preliminary feasibility assessment. Therefore, in this study, the introduction of LID (Low Impact Development) technique was evaluated as an alternative to ensure...
Tram is one of the eco-friendly new urban transportation, nevertheless, tram construction project is being delayed due to low economic in preliminary feasibility assessment. Therefore, in this study, the introduction of LID (Low Impact Development) technique was evaluated as an alternative to ensure the project feasibility. The reduced greenhouse gas effect by LID technique application in tramway construction was quantified to increase environmental benefit as part of an overall economic assessment. In addition, the effect of urban water cycle by application of penetration typed permeable block was examined as a special assessment item in policy analysis. The carbon emission ratios of permeable turf block according to the turf coverage rate(100%, 50% granite, and 50% HDPE) against to the concrete track construction were ?184.7%, -127.3%, and ?116.3%, respectively. The carbon emission ratios of permeable block with granite and HDPE were each 30.1% and 52.5%. In the case of penetration typed permeable block, the rainfall could be stored in the block until 90 mm/hr of rainfall intensity (94.3% of water reserve rate), thereby there was effective as urban water cycle system. As a result, increased environmental benefit by LID technique application is expected in tramway construction and this part needs to be considered as a policy factor of AHP analysis. As well as the reduced greenhouse gas effect and urban water cycle, if assessment items are extended to city scenery, landscaping effect, and aesthetic improvement effect an so on, the environmental benefit would be enlarged. Consequently, the eco-friendly tram construction applied with LID technique is expected that sufficient economic efficiency will be secured.
Tram is one of the eco-friendly new urban transportation, nevertheless, tram construction project is being delayed due to low economic in preliminary feasibility assessment. Therefore, in this study, the introduction of LID (Low Impact Development) technique was evaluated as an alternative to ensure the project feasibility. The reduced greenhouse gas effect by LID technique application in tramway construction was quantified to increase environmental benefit as part of an overall economic assessment. In addition, the effect of urban water cycle by application of penetration typed permeable block was examined as a special assessment item in policy analysis. The carbon emission ratios of permeable turf block according to the turf coverage rate(100%, 50% granite, and 50% HDPE) against to the concrete track construction were ?184.7%, -127.3%, and ?116.3%, respectively. The carbon emission ratios of permeable block with granite and HDPE were each 30.1% and 52.5%. In the case of penetration typed permeable block, the rainfall could be stored in the block until 90 mm/hr of rainfall intensity (94.3% of water reserve rate), thereby there was effective as urban water cycle system. As a result, increased environmental benefit by LID technique application is expected in tramway construction and this part needs to be considered as a policy factor of AHP analysis. As well as the reduced greenhouse gas effect and urban water cycle, if assessment items are extended to city scenery, landscaping effect, and aesthetic improvement effect an so on, the environmental benefit would be enlarged. Consequently, the eco-friendly tram construction applied with LID technique is expected that sufficient economic efficiency will be secured.
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