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Use of Fluorescein as a Ground Water Tracer in Brackish Water Aquifers
Author(s) -
Chua Lloyd H.C.,
Robertson Alexander P.,
Yee W.K.,
Shuy E.B.,
Lo Edmond Y.M.,
Lim T.T.,
Tan S.K.
Publication year - 2006
Publication title -
groundwater
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.84
H-Index - 94
eISSN - 1745-6584
pISSN - 0017-467X
DOI - 10.1111/j.1745-6584.2006.00265.x
Subject(s) - brackish water , tracer , aquifer , groundwater , silt , fluorescein , seawater , salinity , environmental science , hydrology (agriculture) , geology , bromide , chemistry , fluorescence , geomorphology , geotechnical engineering , oceanography , physics , organic chemistry , quantum mechanics , nuclear physics
A drift and pumpback experiment was conducted in a brackish water sandfill. The sandfill was reclaimed from the sea in the eastern part of Singapore and contains sands with low organic and clay/silt contents. The high salinity in the ground water precludes the use of chloride and bromide as tracers in such an environment, and a field experiment was conducted to assess the viability of using fluorescein as a tracer in brackish water aquifers. Nitrate was used as a second tracer to serve as a check. Initial laboratory studies showed that fluorescence was unaffected over the range of electrical conductivity and pH of the ground water. Results from the field experiment show that fluorescein appears to behave conservatively.
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