Suchergebnisse

AbstractThe observed global sea level rise owing to climate change, coupled with the potential increase in extreme storms, requires a reexamination of existing infrastructural planning, construction, and management practices. Storm surge shows the effects of rising sea levels. The recent super storms that hit the United States (e.g., Hurricane Katrina in 2005, Sandy in 2012, Harvey and Maria in 2017) and China (e.g., Typhoon Haiyan in 2010) inflicted serious loss of life and property. Water level rise (WLR) of local coastal areas is a combination of sea level rise, storm surge, precipitation, and local land subsidence. Quantitative assessments of the impact of WLR include scenario identification, consequence assessment, vulnerability and flooding assessment, and risk management using inventory of assets from coastal areas, particularly population centers, to manage flooding risk and to enhance infrastructure resilience of coastal cities. This article discusses the impact of WLR on urban infrastructures with case studies of Washington, DC, and Shanghai. Based on the flooding risk analysis under possible scenarios, the property loss for Washington, DC, was evaluated, and the impact on the metro system of Shanghai was examined.

AbstractTwo kinds of FeC micro‐electrolysis materials (FeC MEMs) named Fe0/FeC MEMs and Fe3O4/FeC MEMs were prepared using low‐cost biochar, chemical grade Fe0 powder and industrial iron powder. The FeC MEMs were characterized by XRD, SEM and FT‐IR. Meanwhile, the effects of sintering temperatures and mass ratios of Fe to C on the treatment high chemical oxygen demand (COD) pesticide wastewater were studied. The results display that the relative removal rate of COD reached 64% for Fe0/FeC MEMs when the sintering temperature was 400°C and the mass ratio of Fe to C was 1 : 1. For Fe3O4/FeC MEMs, and the mass ratio of Fe3O4 to C was 1 : 3, the relative removal rate of COD reached 63.71%. Hence, the chemical grade Fe0 powder could be replaced with industrial iron powder to achieve the goal of low‐cost treatment of the high COD pesticide wastewater.