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TitleDetecting groundwater storage change using micro-gravity survey in Waterloo Moraine
AuthorLiard, J; Huang, J; Silliker, J; Jobin, D; Wang, SORCID logo; Doherty, A
SourceGeohydro 2011, proceedings of the joint meeting of the Canadian Quaternary Association and the Canadian Chapter of the International Association of Hydrogeologists; 2011 p. 1-6
LinksOnline - En ligne (Full program/Programme complet, PDF 150 MB)
Alt SeriesEarth Sciences Sector, Contribution Series 20120451
PublisherCanadian Quaternary Association
MeetingGeohydro 2011, Joint meeting of the CANQUA and International Association of Hydrogeologists; Quebec City; CA; August 28-31, 2011
RelatedThis publication is related to Detecting groundwater storage change using micro-gravity survey in Waterloo Moraine
NTS40P/01; 40P/02; 40P/07; 40P/10
AreaKitchener; Waterloo
Lat/Long WENS -81.0000 -80.2500 43.7500 43.0000
Subjectssurficial geology/geomorphology; hydrogeology; geophysics; aquifers; groundwater; groundwater resources; groundwater regimes; gravity surveys; gravity interpretations; glacial landforms; moraines; Waterloo Moraine; global positioning system
Illustrationslocation maps; photographs; plots
ProgramGroundwater Geoscience, Aquifer Assessment & support to mapping
AbstractMicro-gravity surveying based on recent absolute and relative gravimetry technology has been used to detect groundwater storage change through measuring in-situ spatiotemporal gravity change worldwide for decades. The 1 to 5 parts per billion of the Earth's gravity attraction is detectable, which is equivalent to the attraction of a water mass slab of 2.4 - 12 cm in thickness. With all the standard geophysical effects accurately corrected for, the resulting gravity changes can primarily reflect local and regional total water mass storage changes. To derive groundwater storage change, surface water and soil moisture storage changes are also required by hydrological methods to separate the groundwater change from the total water mass change at the final step.
In the development of micro-gravity technology for aquifer mapping activity in Canada, two epochs of a pilot gravity survey were conducted in the Waterloo Moraine during the periods of May 10 - 18 and August 23 - September 2 2010, respectively. The same 85 field stations were occupied each time. A reference station was established in the University of Waterloo using an absolute gravimeter. Two relative gravity meters and two GPS receivers were used for the surveys. Soil moisture data were also collected by Agriculture Canada in coordination with the gravity surveys.
In this paper, we will report the field plan, gravity and GPS survey, data processing and analysis of the two Waterloo gravity campaigns. We will also present preliminary results, conclusions and a future activity plan.

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