water, a source of life

8/14/2019 Water, A Source of Life

1/19

Comenius MultilateralComenius MultilateralProjectProject

Water,Water,a source of lifea source of life


2/19

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


3/19


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


4/19


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


5/19

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)


6/19

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


7/19

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


8/19

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


9/19

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


10/19

Purification of waterPurification of water

After these processing,After these processing,water can bewater can be

distributed through thedistributed through the

public waterpipepublic waterpipe


11/19

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%


12/19


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).


13/19


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


14/19


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


15/19

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


16/19

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


17/19

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


18/19

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.


19/19

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.

water, a source of life

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