| Citation |
Ricketts, B D; Liebscher, H; 1994; The geological framework of groundwater in the Greater Vancouver area; Natural Resources Canada, Geological Survey of Canada, Bulletin 481, 1994; p. 287-298; 12p. |
| Organization |
Geological Survey of Canada |
| URL |
http://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fulle.web&search1=R=203255 |
| Abstract/Description or Keywords |
Groundwater in the Vancouver, Fraser Valley and adjoining Coast and Cascade mountain area flows through three main types of material: (1) unconsolidated or semiconsolidated sediment of glacial and interglacial origin in the Fraser Valley and delta, which is less than 2 million years and mainly less than 100 000 years old; the sand and gravel aquifers generally have high porosity (up to 40% and high hydraulic conductivity; (2) lithified Cretaceous and Tertiary sedimentary rocks, which have low intergranular porosity (<15%) and some fracture porosity; and (3) fractured granitic and metamorphosed sedimentary and volcanic rocks mostly greater than 90 million years old in the Coast and Cascade mountains. The greatest demand for groundwater, comprising more than 44% of water requirements in the Fraser Valley, is from Quaternary deposits and in particular the Sumas Drift (10 000-14 000 BP), which includes the unconfined Abbotsford and Brookswood aquifers. Water quality in some of these aquifers is already compromised by human activities. |
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Article |
| Regional Watershed |
Lower Fraser |
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