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Dünya Tatlı Su Rezervlerinin Dağılımı
1996
Journal:  
Marmara Coğrafya Dergisi
Author:  
Abstract:

ÖZET 510 Milyon km2 yüzölçüme sahip dünyanın 2/3'sini sular, 1/3'ini karalar kaplar. 361 milyon km2alan kaplayan suların % 2.5' i tatlı sulardan oluşmaktadır. Geri kalan % 97.5'i tattı olmayan sulardır. Tatlı suların da tamamı her an kullanıma hazır bulunmuyor. Bunun da 2/3'si kutuplarda ve yüksek dağlık alanlarda buz halinde kilitlidir. Düny anüfusunun hızla artmasına parelel olarak tatlı su ihtiyacı da her yıl 12.500 km3 artmaktadır. Oysa tatlı su alanları çevre kirlenmesi vb. nedenlerle sürekli daralmaktadır. O halde bugün için tatlı su kaynaklarının coğrafi dağılımı nasıldır? ABSTRAC T The earth covers an are of 510 million square kilometer. The continents accupy 71 % (149 million sauare kilometer), and oceans accupy 29 % (361 million square kilometer). Liquid vvater on Earth 's surface evaporates to become water vapor in the atmosphere . Tha t vapor then condensed and preciptates back on to the several parts ofthe earth's surface. This precipitated water then runs öff İnto storage areas. 97.5 % of the vvater isin storage in oceans, seas and lakes. The only 2.5 % is freshvvater. Tvvo-thirds of this freshvvater is iocked up as glacial ice on mountains and in poles. Increasing the world population causes to increase the need of fresh vvater by about 12.500 kn# in a year. Hovvever, the freshvvater sourcesdecreasingasaresultofenvîronmentelpollution.

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