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The 11,900 square kilometres (4,600 sq mi) basin of the Shinano-Chikuma River system is the third largest in Japan and at 367 kilometres (228 mi), is the longest river in the country. The river system supports a population of around 3 million (as of 2009) and supports significant agriculture and electricity generation. [1] [26]: 182 The river ...
Rivers of Japan are characterized by their relatively short lengths and considerably steep gradients due to the narrow and mountainous topography of the country. An often-cited quote is 'this is not a river, but a waterfall' by the Dutch engineer ( o-yatoi gaikokujin ) Johannis de Rijke who had visited the Jōganji River , Toyama Prefecture .
Chindwin River [citation needed] Myanmar: 1,207 750 57 Chuna (Чуна) [50] Russia: 1,203 748 58 Red River (Sông Hồng) [51] China, Vietnam: 1,200 746 59 Jialing River (嘉陵江) [52] China: 1,190 739 60 Kızılırmak River (Halys River) [53] Turkey: 1,182 734 61 Markha (Марха́) [54] Russia: 1,181 734 62 Nen River (Nenjiang) [55 ...
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Ayase River: Kantō, Japan: The most polluted river in Japan from the 1960s to the 1990s, leading to cleanup efforts. [218] River Churnet: Staffordshire, England: Became possibly the most polluted river in Europe in the 19th century. Improved after the decline of industry in Leek and the Churnet Valley. [219] Charles River: Massachusetts ...
However, the path along the river's deepest point is fractal in the same way that the coastline is. Even when detailed maps are available, the length measurement is not always clear. A river may have multiple channels, or anabranches. The length may depend on whether the center or the edge of the river is measured.
[6] [7] If a river system is designated Class A, all the constituent rivers are also designated as such. Therefore, Class B rivers cannot coexist with Class A rivers in the same river system. [7] This designation is also called First Class. Class A river (一級河川, Ikkyū kasen) is a designation which applies to important individual rivers ...
The Tone River (利根川, Tone-gawa) is a river in the Kantō region of Japan. It is 322 kilometers (200 mi) in length (the second longest in Japan after the Shinano River ) and has a drainage area of 16,840 square kilometers (6,500 sq mi) (the largest in Japan).