{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Geog 1113 test 3

Geog 1113 test 3 - KARST PROCESSES LANDSCAPES Groundwater...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
KARST PROCESSES & LANDSCAPES ** Groundwater * 2nd largest potential source of freshwater (22%) * accumulates by percolation through the soil and rock * how well it percolates is controlled by: * porosity: the percentage of the total volume of a rock or soil that consists of pore space (spaces within a rock). Types of pore spaces: spaces between mineral grains, fractures, solution cavities, & vesicles * permeability: capacity of a material to transmit fluids or how well fuilds will move through it Controlled by: fluid’s viscosity, hydrostatic pressure, the size of the openings, & the degree to which the openings are interconnected ** water passes through the zone of aeration , a permeable layer ; has a permeability rate > .01m/day ** collects in the zone of saturation , which is above an impermeable layer (rate < .01m/ day) * impermeable layer may be of 3 types: 1) aquitard 2) aquiclude 3) aquifuge easiest to go through hardest to go through * the water table is the upper limit of the zone of saturation * this zone of saturation is an unconfined aquifer : with a permeable layer above and an impermeable layer below * a confined aquifer: has an impermeable layer above and below it, and is recharged in select places * may develop other features: * artesian well : a flow of water onto the surface under pressure from a confined aquifer * spring : a surface flow of water that emerges from underground, not under pressure from an unconfined aquifer. * stream : water flowing on the surface, in a watercourse, where the water table is above the surface; permanent or temporary
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
* thermal springs & geysers : water heated to high T°'s; usually associated with recent volcanic activity * ground subsidence : if groundwater is removed in large quantities, surface may react by sinking to fill the new space KARST
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 5

Geog 1113 test 3 - KARST PROCESSES LANDSCAPES Groundwater...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon bookmark
Ask a homework question - tutors are online