Use of Strontium Isotopes to Identify Buried Water Main Leakage Into Groundwater in a Highly Urbanized Coastal Area
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- 作者：Chi-man Leung ; Jiu Jimmy Jiao
- 刊名：Environmental Science & Technology
- 出版年：2006
- 出版时间：November 1, 2006
- 年：2006
- 卷：40
- 期：21
- 页码：6575 - 6579
- 全文大小：327K
- 年卷期：v.40,no.21(November 1, 2006)
- ISSN：1520-5851
文摘
Previous studies indicate that the local aquifer systems inthe Mid-Levels, a highly urbanized coastal area inHong Kong, have commonly been affected by leakagefrom water mains. The identification of leakage locationswas done by conventional water quality parameters includingmajor and trace elements. However, these parametersmay lead to ambiguous results and fail to identify leakagelocations especially where the leakage is from drinkingwater mains because the chemical composition of drinkingwater is similar to that of natural groundwater. In thisstudy, natural groundwater, seepage in the developedspaces, leakage from water mains, and parent aquifermaterials were measured for strontium isotope (87Sr/86Sr)compositions to explore the feasibility of using these ratiosto better constrain the seepage sources. The resultsshow that the 87Sr/86Sr ratios of natural groundwater andleakage from water mains are distinctly different and thus,they can provide additional information on the sourcesof seepage in developed spaces. A classification systembased on the aqueous 87Sr/86Sr ratio is proposed for seepagesource identification.