论文部分内容阅读
滚滚黄河,从青海省巴颜喀喇山的噶达素齐老峰,拔海约四千公尺的星宿海发源,经八千八百华里的路程。流向东方的大海。但是四千余公尺的拔海差度,几乎全部在郑州以上的中上游:星宿海到兰州,每公里平均高下相差二公尺半:从兰州到潼关每公里平均高下相差一公尺;从潼关到郑州,平均每公里高下相差半公尺;郑州以下一直到海,约一千六百余华里,只有一百公尺的拔海差度,平均每公里高下相差不到二公寸。因此,郑州以下的黄河下游,几乎是在玻璃板上流。中上游水流急速,河岸陡峻
Billowing the Yellow River, from the Bayan Kara Mountain in Qinghai Province Karu Su Qi Lao Feng, pull the sea about four thousand meters of Xinghai sea source, by eight hundred and eighty Huari distance. Flow to the sea in the east. However, more than 4,000 meters pull the difference between the sea level, almost all in the upper reaches of Zhengzhou: Xinghai to Lanzhou, the average height of each kilometer difference between two meters and a half: from Lanzhou to Tongguan average height difference of one meter ; From Tongguan to Zhengzhou, the average height of each kilometer difference of half a meter; Zhengzhou following the sea has been to about 1,600 Huari, only 100 meters of pull the sea level difference, the average difference between each km less than Two inches. Therefore, the lower reaches of the Yellow River in Zhengzhou, almost in the glass flow. The rapid flow of water in the upper reaches of the river steep