The objective of the present study to assess the performance of a suggested sewer line by using pipe jacking system (PJS) in order to enhance the sewage capacity and mitigate sewer flooding of historic pilgrimage city of Karbala, Iraq. The storm water management model (SWMM5) was used for this purpose. The simulation of exiting sewer system reveals that sewer discharge during peak pilgrimage period is more than 200% of the capacity of existing sewer line. Installation of SLL having a diameter of 2.5 m at a depth ranging between 12 and 22 m by PJS can reduce water depth in sewer pipe by 78%. The reduction of water depth at sewer pipe can reduce sewer overflow up to 70%, if the system is installed and managed properly. The methodology proposed in the paper can be applied in any location having similar problem with necessary modifications.

本研究的目的是通过使用顶管系统（PJS）来评估建议的下水道管线的性能，以提高排污能力并减轻伊拉克历史悠久的朝圣城市卡尔巴拉的下水道洪水。为此使用了雨水管理模型（SWMM5）。对现有下水道系统的模拟表明，朝圣高峰期的下水道排放量是现有下水道容量的200％以上。通过PJS安装直径为2.5 m的SLL，深度在12至22 m之间，可以将下水道中的水深减少78％。如果系统安装和管理正确，减少下水道水深可将下水道溢流减少多达70％。本文中提出的方法可以在有类似问题并经过必要修改的任何地方使用。