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Water Vocab
Water Vocab - APES
26
Environmental Studies
12th Grade
03/11/2010

Additional Environmental Studies Flashcards

 


 

Cards

Term
groundwater
Definition
Some precipitation infiltrates the ground and percolates downward through spaces in soil, gravel, and rock until an impenetrable layer of rock stops it. The water in these spaces is called groundwater—one of our most important sources of freshwater and a key component of the earth’s natural capital.
Term
zone of saturation
Definition
The spaces in soil and rock close to the earth’s surface hold little moisture. Below a certain depth, in the zone of saturation, these spaces are completely filled with water.
Term
water table
Definition
The top of this groundwater zone
Term
surface water
Definition
the freshwater from precipitation and snowmelt that flows across the earth’s land surface and into rivers, streams, lakes, wetlands, estuaries, and ultimately to the oceans.
Term
reliable surface runoff
Definition
the amount of surface runoff that we can generally count on as a source of freshwater from year to year.
Term
reservoir
Definition
After a river is dammed, the river’s flow creates an artificial lake, or reservoir, behind the dam.
Term
desalination
Definition
involves removing dissolved salts from ocean water or from brackish (slightly salty) water in aquifers or lakes for domestic use.
Term
floodplain
Definition
A flood happens when water in a stream overflows its normal channel and spills into the adjacent area, called a floodplain.
Term
saltwater intrusion
Definition
Movement of salt water into freshwater aquifers in coastal and inland areas as groundwater is withdrawn faster than it is recharged by precipitation.
Term
unconfined aquifer
Definition
An unconfined aquifer is an aquifer with a permeable water table.
Term
confined aquifer
Definition
A confined aquifer is bounded above and below by less permeable beds of rock where the water is confined under pressure
Term
sinkhole
Definition
Sinkholes form when the roof of an underground cavern collapses after being drained of groundwater.
Term
natural recharge
Definition
Natural replenishment of an aquifer by precipitation, which percolates downward through soil and rock. See recharge area.
Term
watershed
Definition
Land area that delivers water, sediment, and dissolved substances via small streams to a major stream (river).
Term
surface runoff
Definition
Water flowing off the land into bodies of surface water. See reliable runoff.
Term
recharge area
Definition
Any area of land allowing water to pass through it and into an aquifer. See aquifer, natural recharge.
Term
center pivot sprinkler
Definition
Water usually pumped from underground and sprayed from mobile boom with sprinklers.
Term
drip irrigation
Definition
Above- or below-ground pipes or tubes deliver water to individual plant roots.
Term
seeding clouds
Definition
Seeding clouds with tiny particles of chemicals to increase rainfall towing icebergs or huge bags filled with freshwater to dry coastal areas have all been proposed but are unlikely to provide significant amounts of freshwater.
Term
land subsidence
Definition
Sinking of land (subsidence) from overpumping
Term
LEPA sprinklers
Definition
Low Energy Precision Application sprinklers. A type of center pivot sprinkler.
Term
artesian well
Definition
An artesian aquifer is a confined aquifer containing groundwater that will flow upward through a well, called an artesian well, without the need for pumping.
Term
consumptive use of water
Definition
Water abstracted which is no longer available for use because it has evaporated, transpired, been incorporated into products and crops, or consumed by man or livestock.
Term
nonconsumptive use of water
Definition
Water that can be treated and returned as surface water, such as sewage
Term
zone of depression
Definition
In the tropics or subtropics, an organized, but non-frontal, system of convective clouds around a low-pressure centre, with closed isobars and circulation.
Term
overdraft
Definition
The process of extracting groundwater beyond the safe yield or equilibrium yield of the aquifer
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