RESURSELE HIDROSFEREI
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Transcript of RESURSELE HIDROSFEREI
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Apa= 71% din supr. GlobOceane si mari= 97,3% din volum
Ape continentale= 2,7%din volum
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OCEANUL PLANETAR
a.este un urias rezervor de resurse minerale:
• petrol si gaze naturale
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Platforma petroliera
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“Maree neagra” –deversari accidentale de petrol
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• noduli polimetalici
• saruri minerale dizolvate in apa
-clorura de sodiu, de magneziu, sarurile de potasiu
Uzina de desalinizare- China
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Sare obtinuta prin desalinizare
Uzina de desalinizare , pe malul Marii Caspice
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• substante minerale cantonate in depozite detritice
-aluviuni bogate in diamante( SV Africii)
Instrument de slefuire a diamantelor
Diamant neslefuit
Forme de diamant slefuit, intrate in istorie
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-aluviuni bogate in fier( Japonia)
- aluviuni bogate in aur si platina ( Alaska)
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•Este o sursa de energie
-energia mareelor Flux in G.Fundy
Reflux in G.Fundy
Centrala mareemotrica La Rance, Franta
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-energia curentilor oceanici-diferenta de temperatura dintre apele de suprafata si cele de adancime-hidrogenul ( combustibilul viitorului
Generatoare de tip “ Anaconda”
Tehnologia Power Buoy
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•Este o sursa de hrana
Pescuit
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Crescatorie de somoni
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Crescatorie de pesti in ocean
Lostrita( somon)
CrabCalmar
Krill
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Acvacultura
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Alge
Alge verzi si rosii
Desert de alge
Obtinerea spirulinei
Hrana pentru pisici si caini
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Ferma de perle in Indonezia
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Alte functii importante ale oceanului:-este principala sursa a umiditatii, asigurand circuitul apei in natura-este principala sursa de O 2 a atmosferei-este cea mai ieftina cale de transport-favorizeaza dezvoltarea oraselor porturi si a statiunilor balneoclimaterice-este mediu de viata pentru numeroase specii vegetale si animale.De altfel, in apa a aparut viata.
APELE CONTINENTALE( DULCI)
Apa dulce
2,7% din volhidrosferei
ghetariApa
subterana
Lacuri si
mlastini
In atmosfera
In rauri
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a. apa- resursa pentru viata
OMS= 150 l apa/zi/loc
SUA= 600 l/zi
Sahara- sub 5 l/zi
Peste 1 miliard de loc. nu au o sursa de apa potabila sigura si aproape 2,5 mld nu dispun de surse sanatoase de apa.
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b. apa- resursa pentru agricultura( 70% din consumul mondial)
4000 m3 apa pt obtinerea 1 t orez
1000 m3 apa pt 1 t grau
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c.apa- resursa pentru industrie( 25% din consumul mondial)
-obtinerea cauciucului -lichid de racire in termocentrale si hidrocentrale
-spalarea carbunilor - obtinerea energiei electrice
d.alte utilizari: transport, pescuit, turism
Guri- Venezuela
12.000 MW 10.300 MW
SUA- fl. Columbia 9.500 MW
Churchill Falls- Canada- fl.Sf.Laurentiu 5000 MW
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