ESTIMATION ON INSTALLATION OF STORM-WATER RESERVOIR AS COUNTERMEASURE OF COMBINED SEWER OVERFLOWS IN CONSIDERATION OF LIFE CYCLE CARBON DIOXIDE EMISSION

Abstract

The amount of reduced CSO loads and the amount of CO₂ emission by the construction and operation of the reservoir were calculated. The authors have proposed the evaluation index in consideration of CO₂ emission. which is considered not only CSO loads reduced but also CO₂ emission. The calculation cases are 6 examples as following: without reservoir (case1), capacity of reservoirs are 10, 000-50, 000m³ (case2-6). According to this evaluation index, the case3 which capacity of reservoir to 20, 000m³ is the best. When projects are selected to improve social infrastructure, the index gives us an important information about efficient of project effect and CO₂ emission.