Shared Flashcard Set

Details

Lab: Chap 12, Hydrogeology
Terms
16
Geology
Undergraduate 1
04/19/2010

Additional Geology Flashcards

 


 

Cards

Term
Water Table
Definition
the upper surface of the zone of saturation, or the place in the bedrock where all spaces in the rock are saturated with water.
Term
Ground water
Definition
water in the saturated zone
Term
Well
Definition
Hole dug into the the zone of saturation, meant to draw out ground water
Term
aquifer
Definition
(permeable bedrock) (Body of rock or sediment) that water is moving freely through
Term
Confining Beds
Definition
Impermeable bed or rock (ex. silt and clay) that make a confined aquifer (which creates pressure, related to artesian wells)
Term
Hydraulic Gradient
Definition
{image:|}
Term
Water table contour lines
Definition
(dashed blue lines in lab book) Represent the water pressure surface (potentionmetric surface)
Term
Flow lines
Definition
Indicates the flow of shallow ground water (flow goes from high elevation to low elevation)
Term
Cone of depression
Definition
When a pumped well is drawing water faster than it can be replenished, it creates a "cone of depression" in the water table and a change in the ground water flow lines.
Term
Karst
Definition
a distinctive topography that indicates dissolution of underlying soluble rock, generally limestone.
Term
sinkholes
Definition
surface depressions formed by the collapse or caves or other large underground void spaces
Term
Solution valleys
Definition
valley-like depressions formed by a linear series of sinkholes or collapse of the roof of a linear cave.
Term
springs
Definition
places where water flows naturally from the ground (from spaces in the bedrock)
Term
Dissapearing streams
Definition
streams that terminates abruptly by dissapearing into the ground.
Term
Chemical Equation of what happens in karst topography
Definition
(Carbonic acid rainwater dissolves the calcite and other carbonic minerals)

CaCO3 + H2CO3 = Ca + 2HCO3 -1

(Calcite)+(Carbonic Acid)= (calcium ions dissolved in water) + (Bicarbonate ions dissolved in ground water)
Term
Artesian Well
Definition
Pressure created makes water flow to top of well.
Supporting users have an ad free experience!