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TitreDetecting groundwater storage change using micro-gravity survey in Waterloo Moraine
AuteurLiard, J; Huang, J; Silliker, J; Jobin, D; Wang, S; Doherty, A
SourceGeohydro 2011, Joint meeting of the Canadian Quaternary Association and the Canadian Chapter of the International Association of Hydrogeologists, abstracts; 2011 p. 1
Année2011
Séries alt.Secteur des sciences de la Terre, Contribution externe 20120452
ÉditeurAssociation canadienne pour l'étude du Quaternaire
RéunionGeohydro 2011, Joint meeting of the CANQUA and International Association of Hydrogeologists; Quebec City; CA; août 28-31, 2011
Documentlivre
Lang.anglais
Mediaen ligne; numérique
Référence reliéeCette publication est reliée à Liard, J; Huang, J; Silliker, J; Jobin, D; Wang, S; Doherty, A; (2011). Detecting groundwater storage change using micro-gravity survey in Waterloo Moraine, Geohydro 2011, proceedings of the joint meeting of the Canadian Quaternary Association and the Canadian Chapter of the International Association of Hydrogeologists
Formatspdf
ProvinceOntario
SNRC40P/01; 40P/02; 40P/07; 40P/10
Lat/Long OENS-81.0000 -80.2500 43.7500 43.0000
Sujetsaquifères; eau souterraine; ressources en eau souterraine; régimes des eaux souterraines; levés gravimétriques; interprétations de la pesanteur; topographie glaciaire; moraines; Moraine de Waterloo ; géologie des dépôts meubles/géomorphologie; hydrogéologie; géophysique
Illustrationslocation maps; photographs; plots
ProgrammeAquifer Assessment & support to mapping, Géoscience des eaux souterraines
LiensOnline - En ligne
LiensOnline - En ligne (Full program/Programme complet, PDF 150 MB)
Résumé(disponible en anglais seulement)
Micro-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.
GEOSCAN ID292381