GEOSCAN, résultats de la recherche

Menu GEOSCAN


TitreSurface deformation observed by InSAR shows connections with water storage change in southern Ontario
AuteurLi, J; Wang, S; Michel, C; Russell, H A J
SourceJournal of Hydrology: Regional Studies vol. 27, 100661, 2019 p. 1-11, https://doi.org/10.1016/j.ejrh.2019.100661 (Accès ouvert)
Année2019
Séries alt.Ressources naturelles Canada, Contribution externe 20190594
ÉditeurElsevier
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1016/j.ejrh.2019.100661
Mediapapier; en ligne; numérique
Formatspdf; html
ProvinceOntario
SNRC30L/11; 30L/12; 30L/13; 30L/14; 30M/03; 30M/04; 30M/05; 30M/06; 30M/11; 30M/12; 30M/13; 30M/14; 31D/04; 40I/09; 40I/10; 40I/11; 40I/13; 40I/14; 40I/15; 40I/16; 40P; 41A/01; 41A/02
Lat/Long OENS -81.7500 -79.2500 44.2500 42.5333
Sujetsdéformation; affaissement; chargement d'eau; ressources en eau souterraine; régimes des eaux souterraines; télédétection; imagerie par satellite; méthodes radar; géodésie; géodésie par satellite; réseaux géodésiques; eaux de surface; lacs; niveaux d'eau; précipitation; sediments; dépôts glaciaires; tills; boues; sables; dépôts postglaciaires; Bassin de Lake Ontario ; Bassin de Great Lakes ; système de positionnement global; sédiments fluvioglaciaires; sédiments glaciolacustres; dépôts anthropiques; traitement des données; tendances; hydrogéologie; géologie des dépôts meubles/géomorphologie; géophysique; Sciences et technologie; Nature et environnement
Illustrationsgeoscientific sketch maps; tables; satellite images; time series; plots
ProgrammeScience de la télédétection spatiale, Caractérisation de la surface terrestre
Diffusé2019 12 31
Résumé(disponible en anglais seulement)
Study region: A 10,000 km2 area of southwestern Ontario within the Lake Erie and Lake Ontario basins of the Laurentian Great Lakes basin, Ontario, Canada, a humid northern hydrogeological setting with abundant precipitation and recharge, and a stable Paleozoic sedimentary bedrock overlain by glacial sediment forming a relatively uncompressible sedimentary succession.
Study focus: Examining land surface deformation in southern Ontario and its connection with water storage change.
New hydrological insights: The surface deformation, observed from a set of 48 Radarsat-2 InSAR images over five years from Jan. 2013 to Sept. 2017 presents a subsidence trend of 1?10 mm/year and a seasonal variation of up to 20 mm over the region. The InSAR results are confirmed by the GPS measurements at six locations over the region. The surface deformations were compared to the water storage data derived from GRACE satellites, in-situ water levels of the Great Lakes, and precipitation data in the study area. The results indicate that the multi-year trend and seasonal variations in surface deformation are correlated to water storage changes, suggesting that the surface deformation in southern Ontario could be caused by water loading.
Résumé(Résumé en langage clair et simple, non publié et disponible en anglais seulement)
The surface deformation, observed from a set of 40 Radarsat-2 InSAR images over five years (Jan. 2013 - Sept. 2017), presents a subsidence trend from 2013 to 2017 with a mean annual rate of 4 mm and a seasonal variation of up to 20 mm over the region. The subsidence varies with locations ranging from 1 mm/year to 10mm/year. The InSAR results are confirmed by the GPS measurements in both long term declining trend and seasonal variations. The surface deformations were compared to the water storage data derived from GRACE satellites, in-situ water levels of the Great Lakes, and monthly precipitation data in the study area. The results indicate that the multi-year trend and seasonal variations in surface deformation are consistent with water storage changes, suggesting that the surface deformation in southern Ontario could be caused by the water loading.
GEOSCAN ID321919