water that fills the cracks and spaces in underground soil and rock layers, located underground.
water that flows over land until it reaches lakes, rivers, or other areas.
the upper surface of underground water; the upper boundary of the zone of saturation.
Surface runoff of water that generally can be counted on as a stable source of water from year to year.
the land area that supplies water to a river system.
A groundwater storage area trapped between two impermeable layers of rock.
The ability of a rock or sediment to let fluids pass through its open spaces, or pores.
The amount of open space between rock particles.
zone of aeration
Zone immediately below the ground surface within which pore spaces are partially filled with water and partially filled with air.
zone of saturation
lower region of groundwater where all the pore spaces in a rock or sediment are filled with water.
aquifer in which there is no impermeable layer restricting the upper surface of the zone of saturation.
water that is absorbed by the soil and funneled down to groundwater.
Area of the Earth's surface where water percolates down into the aquifer.
countries that have a renewable annual water supply of about 1700 cm/year per person.
a country's condition when its yearly per capita water availability falls below 1,000 cm/year per person.
The drying of soil, due to overgrazing and deforestation.
a method of landscaping that uses plants that are well adapted to the local area and are drought resistant.
fresh water that is above ground in lakes, ponds, rivers and more.
Natural replenishment of an aquifer by precipitation, which percolates downward through soil and rock.
when scientists add special chemicala to a could to cause precipitation.
a system by which water is transported very long distances from its source through aqueducts or pipelines.
a storage area for fresh water supplies that's held for a long time period.
the process of removing salt from ocean water.
A concept of water ownership in which the landowner's right to use available water is based on a government administered permit system.
The downward movement through pores and and spaces in the soil due to gravity of water.
The collection, storage, and reuse of rainwater.
The average time a given molecule of water or other substance will stay in a given water source.
right of a landowner whose land borders a river or stream to use and enjoy that water.
water is pumped to the fields and is allowed to flow along the ground among the crops.
A stream system that resembles a pattern of branching tree.
It seperates watersheds.
Causes water in a stream to overflow its normal channel & flood the area.
The process of fresh water and salt water mixing.
Above or below ground, pipes or tubes deliver water to individual pant roots.
Heating saltwater until it evaporates, leaving behind water in a solid form.
Uses high pressure to force saltwater through a membrane filter. Keeping the salt behind and letting the water go through.
Water thar has been used (Shower water) and can be reused again for something else (Toilet water).
Center pivot irrigation
Sprinklers spraying directly on the crops allowing 80% of water to reach the crops, reducing depletion of the Ogallala aquifer by 30%.