中国含沙量最大的河流

编者:物理学者 来源:最有料 时间:2014-12-15 18:34 最签:最大 浏览:

含沙量最大的河流 黄河是世界上含沙量最大的河流,同时是中国第二长河,世界第五长河,被誉为中国的母亲河。黄河长达5 464千米,流域面积达到752 442.76平方千米,流经9个省区,在

  含沙量最大的河流The biggest river sediment concentration

  黄河是世界上含沙量最大的河流,同时是中国第二长河,世界第五长河,被誉为中国的“母亲河”。黄河长达5 464千米,流域面积达到752 442.76平方千米,流经9个省区,在中国北方蜿蜒流动。从高空俯瞰,它恰似一个巨大的“几”字,又隐隐像我们民族那独一无二的图腾——龙。 黄河中游河段流经黄土高原地区,因水土流失,支流带入大量泥沙,使黄河成为世界上含沙量最多的河流。最大年输沙量达39 亿吨(1933年),最高含沙量920千克/立方 米(1977年)。三门峡站多年平均输沙量约 16亿吨,平均含沙量35千克/立方米,而长江每立方米水含沙量还不到1千克。而泥沙经过黄河入口进人渤海、黄海以至东海的有11.5亿吨,其余4. 2亿吨均在沿河沉积下来。 黄河年平均16亿吨的泥沙如果筑成宽一米、高一米的城墙,长度相当于地球与月球之间的距离(38. 44万千米)的3倍,相当于赤道长度的27倍。 黄土高原的大量黄土由黄河向平原、向海洋运输,日积月累,使陆地不断扩大,海盆不断淤浅。这样,不仅在黄土高原的东面形成了巨大的华北平原,而且在我国东部边缘海中,填造出了一条世界无与伦比的浅海大陆架。现在,渤海、黄海以及东海的大部分都已 属浅海大陆架的范围。The Yellow River is the world's biggest river sediment concentration, also is the second longest river in Chinese, the fifth longest river in the world, known as the"mother river China". The Yellow River 5464 km long, the valley area reached 752442.76 square kilometers, flows through 9 provinces in northern Chinese,meandering flow. Looking down from the sky, it is like a huge "several" word,vaguely like our nation that the one and only -- the Dragon totem. In the middle reaches of the Yellow River river flows through the area of Loess Plateau, due tosoil erosion, tributaries into the large amount of sediment and make the Yellow River become the world's largest river sediment. The maximum annual sediment yield of 39 tonnes (1933), the maximum sediment concentration of 920 kg / m3(1977). Sanmenxia Railway Station years average sediment discharge about 16 tons, the average sediment concentration of 35 kg / m3, and the Yangtze Riverper cubic meter of water sediment concentration is less than 1 kg. But the sediment after the Yellow River entrance into Bohai, the Yellow Sea and the East China Sea of people is 11.5 tons, the remaining 4.2 tonnes were deposited in the river. The Yellow River average annual 16 tons of sediment if built into a one metre wide, one meter high walls, equal in length to the distance between the earth and the moon (384400 km) of 3 times, 27 times the equivalent of the equator. A large number of loess in Loess Plateau from the Yellow River to theplains, to the marine transportation, over time, the land is expanding constantly,constantly filling basin. In this way, not only the formation of the North China Plain is huge in the Loess Plateau on the east side, and in the east of China marginal sea, fill created a world unparalleled shallow continental shelf. Now, Bohai, the Yellow Sea and the East China Sea is mostly belongs to the shallow continental shelf range.

 

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