Estimating environmental load of slope revegetation projects

Abstract

Slope revegetation projects (SRP_s) consume considerable energy. Therefore, in order to estimate the net global warming potential of such projects, we estimated their energy consumption and CO₂ emission. We set up SRP_s having 9 different patterns by combining a lath netting work (LNW), two slope-crib works (SCW_s), and a material spraying work (MSW). These SRP_s are broadly divided into two categories. One involves a combination of LNW and MSW and the other involves a combination of LNW, SCW, and MSW. The results indicate that the energy consumption and CO₂ emission of these SRP_s are 109.5-176.1 MJ m^-2 and 8.6-14.1kg CO₂ m^-2, and 404.0.532.3 MJ m^-2 and 49.8.66.8 kg CO₂ m^-2, respectively. In addition, the energy consumption and CO₂ emission of the manufacturing materials required for SRP_s are 1.5-2.4 times and 2.8-6.3 times, respectively, as large as these of driving constructive machines.