explain the importance of lakes
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The Earth is called "the water planet" because it has approximately 14,108 cubic kilometers of water. However, 97.5% of this water exists in the seas, and nearly all of the remaining fresh water islocked up in the Antarctic or Arctic ice caps or as groundwater. Therefore, we can freely access onlythe water in lakes (0.007%) in rivers (0.002%). Of these, lakes are the best "available freshwater source on the Earth's surface." Lakes are valued as water sources and for fishing, water transport, recreation, and tourism.
Lakes as a Water SourcesWater use in Japan is distributed for household use (18.4%), industrial use (17.4%), and agricultural use (64.1%). Lakes are a vital source of water for all of these uses. Kasumigaura Lake can provide 61.45 tons of water per second. This water is divided among agricultural use (82.7%), industrial use (13.3%), and public water supply (3.8%); domestic water is supplied to Ibaraki, Chiba, and Tokyo Prefectures. Water from Biwa Lake meets the drinking water needs of 14 million people in Shiga, Kyoto, Osaka, and Hyogo prefectures. The history of Manno-ike Reservoir (Kagawa Pref.), as an agricultural reservoir, dates back to the Taiho period (701 AD to 704 AD). Lakewater is also invaluable as a source for hydroelectric power generation. Hydroelectric power accounts for about ten percent of generated power in Japan, nearly all the water for which comes from artificial and natural lakes.
Lakes as a Water SourcesWater use in Japan is distributed for household use (18.4%), industrial use (17.4%), and agricultural use (64.1%). Lakes are a vital source of water for all of these uses. Kasumigaura Lake can provide 61.45 tons of water per second. This water is divided among agricultural use (82.7%), industrial use (13.3%), and public water supply (3.8%); domestic water is supplied to Ibaraki, Chiba, and Tokyo Prefectures. Water from Biwa Lake meets the drinking water needs of 14 million people in Shiga, Kyoto, Osaka, and Hyogo prefectures. The history of Manno-ike Reservoir (Kagawa Pref.), as an agricultural reservoir, dates back to the Taiho period (701 AD to 704 AD). Lakewater is also invaluable as a source for hydroelectric power generation. Hydroelectric power accounts for about ten percent of generated power in Japan, nearly all the water for which comes from artificial and natural lakes.
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Rivers are the major source of water for irrigation.
Many rivers serve as important channels for transporting people and goods.
Rivers are a rich source of freshwater fish.
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