Earth and Environmental science. Earths sustainable futures test studying. Flashcards
what is the maths formula for discharge in rivers?
cross sectional area x velocity
(Cumacs) M3/sec
Velocity =cumac m3/sec
width x depth
m2 x (m/sec)
what is salt water incursion
When an aquifer is over used and sea water naturally fills it
Evaporation definition
H2O + energy = gas
Oasis is?
when the surface and the water table meet
water table definition
An artesian well is a well that brings groundwater to the surface without pumping because it is under pressure within a body of rock and/or sediment known as an aquifer
what makes a good aquifer
porosity ratio pours vs not pours = very permeable
what is a spring?
water table meets ground surface
Bourne spring
seasonal spring
water pressure level
the height to which water will be in a well
water table well
only will fill up to the water table level
Saturated and aireated
saturated in filled with water
Airated can be filled with water but is filled with air
different sorted amounts and how it varies
Different Grain sizes sorted to different extents
very well sorted
well sorted
moderately sorted
poorly sorted
very poorly sorted
Cone of depression
Water table empties and the water bends down around the well.
both sides of the well have no water as it has bended down from the well
Evapotranspiration
water evaporating through forestation
Precipitation
- rain
- snow
- Hail
- sleet
Falling to the ground after it has condensed
