Coupled radon, methane and nitrate sensors for large-scale assessment of groundwater discharge and non-point source pollution to coastal waters
Henderson, Paul B.
Charette, Matthew A.
MetadataShow full item record
KeywordNon-point source pollution; Submarine groundwater discharge; Methane; Radon; Nitrate; Waquoit Bay; Boston Harbor
We constructed a survey system of radon/methane/nitrate/salinity to find sites of submarine groundwater discharge (SGD) and groundwater nitrate input. We deployed the system in Waquoit Bay and Boston Harbor, MA where we derived SGD rates using a mass balance of radon with methane serving as a fine resolution qualitative indicator of groundwater. In Waquoit Bay we identified several locations of enhanced groundwater discharge, out of which two (Childs and Quashnet Rivers) were studied in more detail. The Childs River was characterized by high nitrate input via groundwater discharge, while the Quashnet River SGD was notable but not a significant source of nitrate. Our radon survey of Boston Harbor revealed several sites with significant SGD, out of these Inner Harbor and parts of Dorchester Bay and Quincy Bay had groundwater fluxes accompanied by significant water column nitrogen concentrations. The survey system has proven effective in revealing areas of SGD and non-point source pollution.
Author Posting. © The Author(s), 2009. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Journal of Environmental Radioactivity 101 (2010): 553-563, doi:10.1016/j.jenvrad.2009.12.004.
Suggested CitationPreprint: Dulaiova, Henrieta, Camilli, Richard, Henderson, Paul B., Charette, Matthew A., "Coupled radon, methane and nitrate sensors for large-scale assessment of groundwater discharge and non-point source pollution to coastal waters", 2009-12-09, https://doi.org/10.1016/j.jenvrad.2009.12.004, https://hdl.handle.net/1912/3163
Showing items related by title, author, creator and subject.
Geochemical and physical sources of radon variation in a subterranean estuary — implications for groundwater radon activities in submarine groundwater discharge studies Dulaiova, Henrieta; Gonneea, Meagan E.; Henderson, Paul B.; Charette, Matthew A. (2007-12-13)Submarine groundwater discharge (SGD), in form of springs and diffuse seepage, has long been recognized as a source of chemical constituents to the coastal ocean. Because groundwater is two to four orders of magnitude ...
Dulaiova, Henrieta; Burnett, William C.; Chanton, Jeffrey P.; Moore, Willard S.; Bokuniewicz, H. J.; Charette, Matthew A.; Sholkovitz, Edward R. (2006-05-21)A field experiment to compare methods of assessing submarine groundwater discharge (SGD) was held on Shelter Island, NY, in May 2002. We evaluated the use of radon, radium isotopes, and methane to assess SGD rates and ...
Isotopic, geophysical and biogeochemical investigation of submarine groundwater discharge : IAEA-UNESCO intercomparison exercise at Mauritius Island Povinec, Pavel P.; Burnett, William C.; Beck, A.; Bokuniewicz, H. J.; Charette, Matthew A.; Gonneea, Meagan E.; Groening, M.; Ishitobi, T.; Kontar, E.; Kwong, L. Liong Wee; Marie, D. E. P.; Moore, Willard S.; Oberdorfer, J. A.; Peterson, R.; Ramessur, R.; Rapaglia, J.; Stieglitz, T.; Top, Zafer (2011-09)Submarine groundwater discharge (SGD) into a shallow lagoon on the west coast of Mauritius Island (Flic-en-Flac) was investigated using radioactive (3H, 222Rn, 223Ra, 224Ra, 226Ra, 228Ra) and stable (2H, 18O) isotopes and ...