| Title | Seasonal variations and long-term trends of groundwater over the Canadian landmass |
| |
| Author | Li, J; Wang, S |
| Source | Hydrogeology vol. 30, 2022 p. 401-415, https://doi.org/10.1007/s10040-022-02460-1  Open Access |
| Image |  |
| Year | 2022 |
| Alt Series | Natural Resources Canada, Contribution Series 20210558 |
| Publisher | Springer |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Canada; Canada; British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon;
Nunavut |
| NTS | 1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65;
66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560 |
| Lat/Long WENS | -141.0000 -50.0000 90.0000 41.7500 |
| Subjects | hydrogeology; Nature and Environment; Science and Technology; groundwater; remote sensing; satellites; climate; cold regions research; Climate change |
| Illustrations | tables; location maps; sketch maps; plots; time series |
| Program | Canada
Centre for Remote Sensing Remote Sensing Science Program |
| Released | 2022 02 15 |
| Abstract | A detailed knowledge of groundwater storage and its dynamic changes is crucial for better understanding the hydrological cycles and managing water resources. Observations from Gravity Recovery and
Climate Experiment (GRACE) satellite mission offer a means for quantifying terrestrial water storage (TWS) change at global scale since 2002. Combining GRACE-observed TWS and land surface model estimates of soil water and surface water storage
provides a way for quantifying groundwater storage changes (WGW). This study examines seasonal variations and trends of the WGW for Canada's landmass over the period of 2003-2016. The results show that the study region has the maximum seasonal
variation (DWGW) of 86.5 mm (or 514.4 km3), with the maximum/minimum WGW appeared in June/March. East Canada has relatively large DWGW values mostly in 150-200 mm with the largest DWGW of up to 350 mm in Newfoundland. The west regions have relatively
small DWGW of ~100 mm with the smallest DWGW of lower than 25 mm in Prairie area. The western and central regions show the maximum/minimum WGW mainly in spring/fall. In contrast, east Canada has the maximum/minimum WGW mostly in fall/spring. For
south Ontario and the Prairie area, the maximum/minimum WGW appeared in summer/winter. The study also reveals that the trends of WGW over the 14 years present large spatial variability, with increasing trends of up to 10 mm/year in east Canada and
decreasing trend of similar magnitudes in the western regions. The study region overall presents a slight increasing trend of 0.31 mm/year or 1.85 km3/year over the study period. |
| Summary | (Plain Language Summary, not published)
A detailed knowledge of groundwater storage and its dynamic changes is crucial for better understanding the hydrological cycles and managing water
resources. Observations from Gravity Recovery and Climate Experiment (GRACE) satellite mission offer a means for quantifying terrestrial water storage (TWS) change at global scale since 2002. Combining GRACE-observed TWS and land surface model
estimates of soil water and surface water storage provides a way for quantifying groundwater storage changes. This study examines seasonal variations and trends of the groundwater storage for Canada's landmass over the period of 2003-2016. The
results show that the study region has the maximum seasonal variation of 514.4 km3, with the maximum/minimum groundwater storage appeared in June/March. The western and central regions show the maximum/minimum groundwater storage mainly in
spring/fall. In contrast, east Canada has the maximum/minimum groundwater storage mostly in fall/spring. For south Ontario and the Prairie area, the maximum/minimum groundwater storage appeared in summer/winter. The study also reveals that the trends
of groundwater storage over the 14 years present large spatial variability, with increasing trends of up to 10 mm/year in east Canada and decreasing trend of similar magnitudes in the western regions. The study region overall presents a slight
increasing trend of 0.31 mm/year or 1.85 km3/year over the study period. |
| GEOSCAN ID | 329462 |
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