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Chapter 13 & 20 APES
Terms in this set (40)
suffering the economic and human consequences of water shortages is known as?
Access to water is a _______ _______ ______ because lack of safe water for drinking and sanitation is the world's single largest cause of illness.
global health issue
Water in the spaces between soil, rock, and gravel, called ___________, is one of the most important sources of freshwater and a key component of the earth's natural capital.
Groundwater in an aquifer typically moves only a _______ or so per year.
Precipitation that does not infiltrate the ground, or evaporate, is called?
In 2005, one of every ____ people lacked access to enough clean water to drink, cook, and wash.
Cities and farmers are competing for access to water resources and the _______ are losing.
Currently more than 1/2 billion people are being fed grains produced by _________ water use.
The Ogallala aquifer supples about ___ of all the groundwater used in the US.
Groundwater overdrafts near coastal areas can contaminate aquifers with __________.
Of the world's 177 longest rivers, only ____ of them run freely all the way to the sea.
If irrigation was just ____% more efficient, there would be enough water for domestic and industrial uses in southern California.
Desalination produces large amounts of wastewater that contains lots of _______, which can not be dumped into nearby oceans.
The largest single use of domestic water in the US is _________.
A flood happens when water in a stream overflows its normal channel covers the adjacent area called a ________.
What are 2 options that Egypt has to meet its water needs in the future, since Ethiopia and the Sudan plan to divert more water from the Nile in the future?
cut population growth, work out water sharing agreement
_______ percentage of the earth is covered by water
_______ percentage of the water supply is liquid freshwater that is available for use.
The hydrologic cycle is the movement of water in the seas, air, and on land that is driven by _____ ______ and _______.
solar energy & gravity
At a certain depth, the area where the spaces in soil and rock are completely filled with water is called the ______ __ ________.
zone of saturation
The top of the groundwater zone is called the
_________ are underground caverns and porous layers of sand and gravel through which groundwater flows.
A _______ is the land from which surface water drains into a river, lake, or other body of water.
70% of water use world wide is for _________
20% of water use world wide is for _________
10% of water use world wide is for __________
cities & residences
Most water resources are owned by _________
In the US, ____________ is used 4x faster than it is replenished.
The water table for the Ogallala aquifer has dropped 30 meters as a result of water withdrawn for ___________.
_____________ is the sinking of ground when water has been withdrawn.
The ________ ________ Dam will be the world's largest hydroelectric plant.
______________ is a type of desalination which uses high pressure to force saltwater through a membrane filter.
_________ is a type of desalination, which is the heating of saltwater until it evaporates.
The cheap price of water is the main cause of water ________.
irrigation that uses pumps to spray water on a crop, getting 80% of water where it is needed.
low pressure sprinkler
Low-energy, precision application sprinklers are a type of center-pivot irrigation that puts _______% of water where crops need it.
most efficient method of irrigation
the most important and effective ways to reduce flooding
What are some of the low-tech methods of irrigation used in developing countries?
rainwater harvesting, harvesting fog
What are at least 2 methods used to improve water efficiency?
xeriscaping, recycling water in industries