GPHY 103 Lecture Notes - Lecture 8: Vadose Zone, Hydrogeology, Silt
18 Dec 2016
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Recap on lake turnover influences: temperature (sun heats the water surface differences turnover, density (primarily from temperature). Hot water = low density, floats on top of cold: wind (can be quite important, especially in spring; lake stable and stratified) Densest water = 4 c ; stable temperature throughout subsurface lake (ice) Constant temperature throughout lake = isothermal: salinity = important in saline lakes, suspended sediment concentration; will settle out of the water column in the lake thus doesn"t affect turnover really. Canada groundwater contamination 2002 walkerton crisis (e. coli); stimulates greater attention to groundwater supply and contamination. Where surface water is absent, groundwater can be routinely supplied for many uses. Maritimes and saskatchewan and prince edward island; high reliance on groundwater; climate dependent. Groundwater interacts with surface water in many important ways. Groundwater comes from precipitation and its infiltration (movement into soil) and percolation (movement within soil down to water table under gravity)
