EAE1011 Lecture Notes - Lecture 18: Artesian Aquifer, Calcite, Calcium Bicarbonate
10 Aug 2018
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Document Summary
Input paths: recharge, porosity & permeability, aquifers & aquitards, timescales, geochemistry, geologic activity. Groundwater distribution: belt of soil moisture - water held by molecular attraction on soil particles in the near surface zone. Water table: upper limit of zone of saturation, variations in the water table, depth => highly variable seasonally & annually, shape ~ subdued replica of surface topography. Interaction between groundwater & streams: basic link in hydrologic cycle, 3 types of interactions, 1. gaining streams gain water from inflow of water through streambed, 2. losing streams lose water to groundwater system via outflow through streambed, 3. combination of 1. Stream gains in some sections, loses in others. Geothermal energy: tapping natural underground reservoirs of steam and hot water. Favourable geologic factors: potent heat source large/porous reservoirs with channels connected to heat source, cap of low permeability rocks, not an inexhaustible energy source.
