GEOL 104 Lecture Notes - Lecture 32: Silicic Acid, Non-Renewable Resource, Travertine

• School: Queen's University
• Department: Geological Sciences and Geological Engineering
• Course: GEOL 104
• Professor: Daniel Layton- Matthews

Document Summary

Geol104 lecture 32 groundwater: permeability, aquitards, and aquifers. Factors influencing the storage and movement of groundwater: porosity. The percentage of pore (open) spaces in a rock or sediment. Depends on the size and shape of the grains, how well they are sorted, and how tightly they are packed: poorly sorted sediments have low porosity, the more fine grained = more porosity. Determines how much groundwater can be stored. Ability of a material to transmit a fluid: depends on the connectivity between pores. As we get finer in grain size, lose permeability: doesn"t allow water to flow through it because shape and size of minerals. An impermeable layer that hinders or prevents water movement: ex clay or mud. Permeable rock strata or sediment that transmits groundwater freely: ex sands and gravels. Can"t have aquifer without aquitard on either side (usually) How groundwater moves: moves very slowly. Average rate is 5cm/day: a simple groundwater flow system.