Florida International University, Civil and Environmental Engineering Department, 10555 West Flagler Street, Engineering Center, Miami, FL, 33174, USA.
Florida International University, Civil and Environmental Engineering Department, 10555 West Flagler Street, Engineering Center, Miami, FL, 33174, USA.
J Environ Manage. 2022 Aug 1;315:115153. doi: 10.1016/j.jenvman.2022.115153. Epub 2022 Apr 30.
Failure of water distribution and wastewater collection pipes can impact human health and environment due to potential contamination of water and soil in the surrounding areas, as well as service interruptions and road closures. This paper provides a quantitative assessment of projected shifts in failure rates of iron pipes due to saltwater intrusion and sea level rise in coastal areas. Probability of pipe failure depends on pipe characteristics, environmental parameters, and systems conditions. Analyses showed that saltwater intrusion and sea level rise can significantly affect the integrity of water and wastewater collection pipes due to potential changes in soil and groundwater characteristics that increase corrosion rates. Corrosion rate is intensified by increased conductivity of groundwater due to salinity. Coastal areas with subtropical climate have higher corrosion rates. The estimated lifetimes of ductile iron pipes are between 80 and 100 years. However, the actual service lifetimes can be significantly shorter. Pipes in subtropical areas corrode significantly faster than those in temperate climates. Presence of dissolved oxygen and chloride ion can significantly intensify the corrosion rates, shortening service times of iron pipes. Projections for pipe corrosion can help development of effective asset management strategies and for infrastructure maintenance planning in coastal areas that are vulnerable to sea level rise.
供水管和污水收集管的故障会对周围地区的水和土壤造成潜在污染，还会导致服务中断和道路封闭，从而影响人类健康和环境。本文针对沿海地区因海水入侵和海平面上升导致的铁管故障率预计变化进行了定量评估。管道故障的概率取决于管道特性、环境参数和系统条件。分析表明，由于土壤和地下水特性的潜在变化会增加腐蚀速率，海水入侵和海平面上升会严重影响供水和污水收集管道的完整性。由于盐分导致地下水电导率增加，从而加剧了腐蚀速率。亚热带气候的沿海地区腐蚀速率较高。球墨铸铁管的估计使用寿命在 80 到 100 年之间。然而，实际的使用寿命可能会显著缩短。亚热带地区的管道腐蚀速度明显快于温带气候地区的管道。溶解氧和氯离子的存在会显著加剧腐蚀速率，从而缩短铁管的使用寿命。对管道腐蚀的预测有助于制定有效的资产管理策略，并为易受海平面上升影响的沿海地区的基础设施维护规划提供依据。
