Water, A Source of Life
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Transcript of Water, A Source of Life
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8/14/2019 Water, A Source of Life
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Comenius MultilateralComenius MultilateralProjectProject
Water,Water,a source of lifea source of life
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How much water do we use every day?How much water do we use every day?
We have calculated thaWe have calculated tha
one of our averagone of our averag
families composed bfamilies composed b
4 people uses about 4 people uses about
mm33 of water per dayof water per day
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How much water do we use every day?How much water do we use every day?
In our school (a littleIn our school (a little
less than 500less than 500
students) we usestudents) we use
about 30,5 mabout 30,5 m33 oof
water per daywater per day
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How much water do we use every day?How much water do we use every day?
In Assemini, a town not far from Cagliari with 30.000In Assemini, a town not far from Cagliari with 30.000inhabitants, they use 1.500 minhabitants, they use 1.500 m33 of water every dayof water every day
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How much water do we use every year?How much water do we use every year?
According to a nationaAccording to a nationa
survey, in Cagliarisurvey, in Cagliari
(about 165.000(about 165.000
people) we use 97.3people) we use 97.3mm33 of water perof water per
person per year (thatperson per year (that
is 1.605.000 mis 1.605.000 m33
forforthe whole town)the whole town)
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Where can we find water?Where can we find water?
Sardinia is characterized by lack of rains and small andSardinia is characterized by lack of rains and small andshort rivers more similar to mountain streams. Thisshort rivers more similar to mountain streams. Thisscarcity can create problems to agriculture , cattlescarcity can create problems to agriculture , cattlebreeding and even to the householdbreeding and even to the household
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Where can we find water?Where can we find water?
The three main
economic fields
(household, industry,
agriculture) employ
water collected in 50
artificial basins
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Composition of water in natureComposition of water in nature
We have collected a sample of water in a pond near our townWe have collected a sample of water in a pond near our townand we have analyzed it. The sample contains: ammonia,and we have analyzed it. The sample contains: ammonia,
nitrous acid and sulphates.nitrous acid and sulphates.
http://www.massimorassu.it/portal/fortificazioni/Cagliari/big/cag10b.jpg -
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Purification of waterPurification of water
In nature, water mayIn nature, water maycontain materials,contain materials,
chemical elements andchemical elements and
micro organismsmicro organisms
dangerous for thedangerous for thepeoples health andpeoples health and
needs to be depuratedneeds to be depurated
using differentusing different
methodologiesmethodologies
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Purification of waterPurification of water
After these processing,After these processing,water can bewater can be
distributed through thedistributed through the
public waterpipepublic waterpipe
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How do we use water?How do we use water?
According to some general surveys the worldAccording to some general surveys the worldaverage use of water is divided as follows:average use of water is divided as follows:
Agriculture 69%Agriculture 69%
Industry 21%Industry 21% Tourism and leisure activities 10%Tourism and leisure activities 10%
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How do we use water?How do we use water?
Italy is the European Country whereItaly is the European Country where
people use the highest quantity ofpeople use the highest quantity ofwater: 213 litres per day per familywater: 213 litres per day per family
(Europe 165 litres per day per(Europe 165 litres per day per
family).family).
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How do we use water?How do we use water?
39% bath - shower39% bath - shower 20% toilet20% toilet
12% washing12% washing 10% dishwashing10% dishwashing
http://images.google.it/imgres?imgurl=http://www.seed.slb.com/en/scictr/watch/bathroom/images/bathtub.gif&imgrefurl=http://www.seed.slb.com/en/scictr/watch/bathroom/index.htm&usg=__jkptS0vWbCF7BpnRN67ICd7CRZk=&h=327&w=500&sz=34&hl=it&start=9&tbnid=KpnZmSZ6cu6mlM:&tbnh=85&tbnw=130&prev=/images%3Fq%3Dbathtub.gif*%26gbv%3D2%26hl%3Dit%26sa%3DGhttp://images.google.it/imgres?imgurl=http://img.tfd.com/wn/05/626D4-dishwashing-machine.gif&imgrefurl=http://www.thefreedictionary.com/dishwashing%2Bmachine&usg=__2TT9JSziaGL0ImQ_QnTdvNovT08=&h=135&w=118&sz=5&hl=it&start=9&tbnid=rUlG0UFj_AdX_M:&tbnh=92&tbnw=80&prev=/images%3Fq%3Ddishwashing.gif*%26gbv%3D2%26hl%3Dit%26sa%3DGhttp://images.google.it/imgres?imgurl=http://img.tfd.com/wn/DB/62D8B-washing.gif&imgrefurl=http://www.thefreedictionary.com/washing&usg=__iUwbK8hTosGZHKGBLDWKLWn_ANs=&h=134&w=135&sz=4&hl=it&start=6&tbnid=Pa-ZIIUvtqiWCM:&tbnh=91&tbnw=92&prev=/images%3Fq%3Dwashing.gif*%26gbv%3D2%26hl%3Dit%26sa%3DGhttp://images.google.it/imgres?imgurl=http://www.city.pg.bc.ca/city_services/utilities/waterconservation/drop-w-toilet.gif&imgrefurl=http://www.city.pg.bc.ca/city_services/utilities/waterconservation/&usg=__2Ct0ss7ELzd_-sLaaZIMGV6ESnQ=&h=1200&w=1200&sz=52&hl=it&start=5&tbnid=0xRqfxK4jTcn5M:&tbnh=150&tbnw=150&prev=/images%3Fq%3Dtoilet.gif*%26gbv%3D2%26hl%3Dit%26sa%3DG -
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How do we use water?How do we use water?
6% kitchen6% kitchen 6% gardening and car6% gardening and carwashwash
1% drinking1% drinking 6% other6% other
http://images.google.it/imgres?imgurl=http://www.daaa.org/swimmer.gif&imgrefurl=http://www.daaa.org/swimmenu.htm&usg=__eGtQQiJhNyQTloqgVlauUwp0qo0=&h=180&w=490&sz=4&hl=it&start=3&tbnid=5iBqvBVjouQ6GM:&tbnh=48&tbnw=130&prev=/images%3Fq%3Dswimmer.gif*%26gbv%3D2%26hl%3Dit%26sa%3DGhttp://images.google.it/imgres?imgurl=http://www.montgomerycountymd.gov/content/dep/greenman/graphics/gardening.GIF&imgrefurl=http://www.montgomerycountymd.gov/content/dep/mosquito/soggy.asp&usg=__UW6vPNsIzK4lqpZZP1sbq1jrk1o=&h=198&w=310&sz=32&hl=it&start=1&tbnid=ZY-O-zl3Op_pnM:&tbnh=75&tbnw=117&prev=/images%3Fq%3Dgardening.gif*%26gbv%3D2%26hl%3Dit%26sa%3DGhttp://images.google.it/imgres?imgurl=http://www.eastlongmeadow.org/mtview/pictures/recipe%2520cooking.gif&imgrefurl=http://www.eastlongmeadow.org/mtview/wellness_policy_approved_recipes.htm&usg=__9VnxHOJxCxJi8ISbrYlK6ss4a88=&h=291&w=232&sz=8&hl=it&start=16&tbnid=8lLdaqBsx01JGM:&tbnh=115&tbnw=92&prev=/images%3Fq%3Dcooking.gif*%26gbv%3D2%26hl%3Dit%26sa%3DG -
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How do we waste water?How do we waste water?
ABBANOA, the localABBANOA, the localauthority that managesauthority that managesthe distribution of waterthe distribution of waterin Sardinia, hasin Sardinia, has
calculated that 40 tocalculated that 40 to60% of the water is60% of the water iswasted because thewasted because thewater pipes are old orwater pipes are old ordoes not work properlydoes not work properly
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Lack or surplus of water?Lack or surplus of water?
Sardinia is characterizedSardinia is characterizedby long periods ofby long periods of
drought: it does not raindrought: it does not rain
for many months andfor many months and
the countrysidethe countrysidebecomes a sort ofbecomes a sort of
desert, with greatdesert, with great
problems for theproblems for the
cultivationscultivations
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Is it possible to save water?Is it possible to save water?
In our everyday life we can do little things to saveIn our everyday life we can do little things to save
water.water.
We can collect rain water to irrigate our gardens.We can collect rain water to irrigate our gardens.We can prefer having a shower rather than a bathWe can prefer having a shower rather than a bath
We can avoid using washing machines andWe can avoid using washing machines and
dishwashers when they are not completely fulldishwashers when they are not completely full
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Protection of the natural habitatProtection of the natural habitat
In Sardinia we have some ponds and lagoonsIn Sardinia we have some ponds and lagoonswhere water fowls of many kinds livewhere water fowls of many kinds live
permanently: pink flamingos, sultans, stilt permanently: pink flamingos, sultans, stilt
bird, wild ducks, kingfishers.bird, wild ducks, kingfishers.Biodiversity in these areas is assured by theBiodiversity in these areas is assured by the
presence of reptiles (tortoises, water andpresence of reptiles (tortoises, water and
grass snakes), amphibians (toads, tree frogs,grass snakes), amphibians (toads, tree frogs,
newt), mammals and fish.newt), mammals and fish.
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Protection of the natural habitatProtection of the natural habitat
Projects have been presented to protect the so calledProjects have been presented to protect the so calledzone umide and are waiting for a final ratification.zone umide and are waiting for a final ratification.
These project are meant to:These project are meant to:
control the quality of water ;control the quality of water ;
create the conditions for a sustainable fruition;create the conditions for a sustainable fruition;
support activities of bird watching;support activities of bird watching;
survey of all the typical species;survey of all the typical species;
control the fishing activities.control the fishing activities.