water resources and usages (use freshwater sustainably (use drip…
water resources and usages
use freshwater sustainably
use drip irrigation: improving efficiency, commonly used in less developed countries since its expensive.
irrigate at night
grow less thirsty crops
organic and polyculture farming to retain soil moisture
problems caused by unsustainable water use
national and global security increasing tensions within nations over the access of limited water
equality and poverty just 52% of the world has water piped, the rest have to find it from dwells or sources
global health has estimated that each day an average of 4,100 people die from infectious diseases.
fresh water being used unsustainably
overload of water pollutants
Earths most important natural capital is freshwater but is the most poorly damaged
withdraw fresh water from underground and surface water supplies faster than natural process replenish it
increasing fresh water availability
heavy populated areas of the world have tried to solve shortage of water by transferring water-rich areas to water-poor areas.
is the process of removing dissolved salts from ocean water or from brackish waters in aquifers or rivers.It is another way to increase supplies of fresh water.
the purpose of a dam is to capture and store the surface runoff from a rivers watershed, helps control floods, and generates electricity.
Dams bring problems such as:
downriver gets dramatic decrease in water
reservoirs aren't useful for long
upriver gets flooded
freshwater use and availability
ecosystems begin to fail when overloaded with water pollutants and the withdraw of fresh water from underground
only 0.024% of the water supply is readily available to us as liquid freshwater stored in lakes, rivers, streams,and caves.
ground water, precipitation soaks into ground and sinks in soil, gravel and rock
fresh water in these underground spaces is called ground water
top layer of this is called water table
earths hydrologic cycle recycles, purifies and distributed freshwater around the world.
ground water and aquifers
Over Pumping Aquifers
increasing poverty and civil unrest, limits on food production and rising food prices
saltwater seeping into costal area aquifiers
inequality, as water tables drop it cost more to drill deeper and pump water up
is an underground layer of water-bearing permeable rock, rock fractures or unconsolidated material
impermeable dirt/rock layers exists that prevents water form steeping into aquifer from the ground surface located above.
are those into which water seeps from the ground surface directly