报告主题：城市地下水与管网

主讲人：罗新研究员（香港大学）

主持人：李猛教授

时间：2025年5月15日周四16：30

地点：深圳大学致知楼706

嘉宾简介：

罗新，香港大学地球科学系博导/研究员，香港大学深圳研究院研究员，国家优秀青年科学基金获得者（2023）。主要研究方向为海岸带水文地质，海岸带地下水生态环境影响、陆海统筹生物地球化学、地下水与管网污水交互作用、地下水与地表水交互作用、溶质运移、地表关键带及同位素水文地质等。此外，主持了香港优配基金、香港协作研究基金子课题、基金委重点项目子课题、基金委面上项目、香港大学新职员基金等研究项目27项。在Science, Nature Communication, Science Advances, Geology, Water Research, Journal of Hazardous Materials等期刊发表论文~80余篇。受邀撰写香港水文志专著（2022），海岸带地下水与生态环境专著（2025）。

报告摘要：

Radon-222: An effective tracer for groundwater intrusion (GWI) and sewer failure/crack in urban sewer systems

As the "blood vessels" and lifelines of cities, Sewer networks play a critical role in managing sewage and stormwater, expanding alongside urban development. According to data from the Ministry of Housing and Urban-Rural Development, by the end of 2022, the total length of urban drainage pipelines reached 913,500 kilometers, a year-on-year increase of 4.73%, while the daily treatment capacity of sewage treatment plants reached 216 million cubic meters, up 4.04% year-on-year. Typically, Sewer pipeplines have a design lifespan of 30 to 50 years. Pipelines and underground facilities constructed in 1980s have long exceeded their intended lifespan, while many built post-reform and opening-up are now aging, with various issues increasingly emerging. Given the vast scale of these pipelines, the demand for inspection, repair, and maintenance is expected to grow significantly over time. The industry’s value and market potential will become even more prominent as cities prioritize green and sustainable development. Current methods for detecting leaks and external water infiltration face challenges such as high costs and limited accuracy. This study employs advanced groundwater tracers to detect pipeline leaks, damages, and groundwater intrusion. Through a half-year case study of an area with high susceptibility to pipeline crack in Shenzhen, the research successfully developed a technique utilizing radon-222 for detecting pipeline damage and external water infiltrations.