Highly productive wetlands, that provide natural flood and erosion control, maintain high water quality and recharge groundwater.
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Zone of saturation
Spaces in soil are filled with water.
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Water footprint
Volume of water we directly and indirectly.
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Hydrologic cycle
Movement of water in the seas, land, and air
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Zone of saturation
Spaces in soil are filled with water
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Water table
Top of the zone of saturation
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Aquifers
Naturally recharge, lateral recharge
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Water footprint
Volume of water we directly and indirectly
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India, China, and the United States
Three largest grain producers
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India and China
Small farmers drilling tubewells
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Saudi Arabia
Aquifer depletion and irrigation
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California Water Project
Inefficient water use
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Desalination
Removing dissolved salts
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Distillation
evaporate water, leaving salts behind
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Reverse osmosis, microfiltration
use high pressure to remove salts
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Flood plains
Highly productive wetlands, that provide natural flood and erosion control, maintain high water quality and recharge groundwater
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Water Table
Upper surface of the zone of saturation, in which all available pores in the soil and rock in the earth's crust are filled with water.
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Surface Water
Precipitation that does not infiltrate the ground or return to the atmosphere by evaporation or transpiration.
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Surface Runoff
Water flowing off the land into bodies of surface water.
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Watershed or Drainage Basin
Land area that delivers water, sediment, and dissolved substances via small streams to a major stream.
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Reliable Runoff
Surface runoff of water that generally can be counted on as a stable source of water from year to year.
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Drought
Condition in which an area does not get enough water because of lower-than-normal temperatures that increase evaporation.
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Floodplain
Flat valley floor next to a stream channel. For legal purposes, the term often applies to any low area that has the potential for flooding, including certain coastal areas.
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Water Footprint
A rough measure of the volume of water that we use directly and indirectly to keep a person or group alive and to support their lifestyles.
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Virtual Water
Water that is not directly consumed but is used to produce food and other products
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Dam
A structure built across a river to control the river's flow or to create a reservoir.
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Reservoir
Artificial lake created when a stream is dammed.
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Drip or trickle irrigation/micro irrigation
Above- or below-ground pipes or tubes deliver water to individual plant roots.
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Rainwater harvesting
the accumulation and deposition of rainwater for reuse on-site, rather than allowing it to run off.
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Xeriscaping
landscape (an area) in a style that requires little or no irrigation.
Studied by 4 people
