2 factures in rock like granite in Canadian shield 3 void created by

2 factures in rock like granite in canadian shield 3

This preview shows page 145 - 148 out of 152 pages.

2) factures in rock, like granite in Canadian shield  3) void created by dissolution of soluble rocks like limestone caves in  Niagara escapement  just because sediments are rock, maybe porous these open spaces may not be connected  which could pose a problem for a viable source of water Permeability is second important parameter to transmit  water – transmit water through  interconnected open spaces in the sediment or rock to continuously draw water from a well for 1 family or an entire city you need to ensure  water flows back into the aquifer  o remember that most productive subsurface units are unconsolidated sands and  gravels that are well sorted and poorly cemented,  which allow water to replenish readily 
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high jointed or fractured rock could be advantage, assuming fractured are  connected  interconnectedness also of concern because this may provide potential  pathway for contaminants, so you start looking for any neighbours but you  realize drilling records for water wells will help you identify a similar depth  to water and potential common aquafer can looked at  Ontario Groundwater website  Waterloo: The importance of Water will examine how water has  been a constant and active player in creating Waterloo’s  landscape and subsurface geology. Remnants of Tropical Seas, Rivers, and Glaciers  Idealized conceptual hydrogeological model for the Waterloo Moraine area in Waterloo, Ontario,  Canada.   Bedrock layers   at the base of this model dipping towards the west are the oldest layers,  followed by valleys cut by mighty rivers into the   bedrock surface , and then   sediment layers   that  infilled valleys and covered the bedrock surface. Stratigraphic layers of sediment are grouped  according to whether they allow groundwater movement, called   aquifers (dark grey)   or impede water,  called   aquitards (white) . Notice that aquifers predominantly consist of  glacial fluvial  and outwash  deposits, which essentially is stratified sediment deposited by glacial meltwater, whereas aquitards 
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consist of  till , which is compact, and poorly sorted sediment directly deposited by glacial ice. The  Waterloo Moraine is an important landform for groundwater replenishment and storage, especially to  provide for the growing populations in the Waterloo area. Why is there so much interest in groundwater and need for geoscientists? Walkerton tragedy in May 2000 brought up importance of ground water o Walkerton water supply became  contaminated with e.coli by farm run off into town  well that cause many people to become ill and few deaths geoscientist became more involved because of expertise in Earth surface processes, 
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