How many rivers are the Yellow River and the Yangtze River in China?

The Yangtze River is the largest river in China and the third largest river in the world. Two thousand years ago, the Yangtze River entered the sea near Zhenjiang and Yangzhou, and it was a funnel-shaped estuary bay, with a distance of about 180km between the north and south of the two mouths. By the Jin Dynasty (265 AD), the Yangtze River estuary extended to the vicinity of Jiangyin, the tidal area boundary was near the Jiujiang River, and Chongming Island was out of the water in the early Tang Dynasty (618 AD), and the current situation of the Yangtze River estuary was formed after the Tang and Song dynasties.

Since 1842, there have been nautical charts at the mouth of the Yangtze River. In the past 100 years, the width of the north and south of the Yangtze River Estuary (Subeizui and Nanhuizui) has narrowed from 118km to 90km, and the underwater delta has gradually extended to the sea, and the -5m line has generally extended 5-10km seaward (the maximum extension distance outside the South Port is 14km), and the tidal boundary has moved down to Datong, Anhui. As the estuary extended, the river gradually narrowed.

In the historical period, the width of the Zhenyang River and the Jiangyin River was more than 10km, and now they have been reduced to and; In 1915, the width of the Nantong River was still 18km, and in 1920, the river narrowed to about the south bank of the Liuhai Shahe River. The narrowing of the width of the Xuliujing River is a matter of recent decades, and the original 13 km wide river surface has been narrowed after the Tonghaisha and Jiangxinsha were successively reclaimed into land. The narrowing of the Yangtze River estuary is characterized by the parallel bank of sandbanks or dark sand, and the riverbed tends to be stable by dividing the waterway into a single channel. Historically, the Yangtze River estuary has been crossed by sandbanks seven times.

Except for the last two when evolution was accelerated by human factors, the remaining five were the result of natural evolution.

The length of the Yellow River: 5464 km, the length of the Yellow River ranks 5th in the world, and the area of the Yellow River Basin:

At 750,000 square kilometers, China is the second largest river and the largest in the world in terms of sediment content. It is the birthplace of Chinese culture, and it is also the sorrow of China. It is named because of the turbidity of the river.

In ancient times, it was called the river, and it was called the Yellow River in the Han book. The Yellow River originates in the northern foothills of Bayankala Mountain in the eastern part of Kunlun Mountain, at an altitude of 4,500 meters above sea level, and flows through nine provinces and regions, including Qinghai, Sichuan, Gansu, Ningxia, Inner Mongolia, Shanxi (Shanxi), Shaanxi, Henan (Henan), and Shandong (Shandong), and flows into the sea near Lijin in Shandong Province, and flows into the Bohai Sea in Kenli County. The Yellow River Basin is located between 32° and 42° north latitude and 96° and 119° east longitude, starting from Bayan Kala Mountain in the west, bordering the Bohai Sea in the east, Yinshan Mountain in the north, and reaching the Qinling Mountains in the south, with a length of about 1,900 kilometers from east to west and 1,100 kilometers from north to south, with a basin area of 10,000 square kilometers, which is about equivalent to the land area of three Britain.

The Yangtze River is the first, and the Yellow River is the second.

The Yellow River is the second largest river in China.

The Yellow River is one of the longest rivers in the world and the second longest river in China (also known as the second largest river). The total length of the Yellow River is about 5,464 kilometers, and its basin area is about 752443 square kilometers in the "People's Daily Online", and the Ministry of Water Resources's "Yellow River Network" is recorded as:

The total area of the basin is 10,000 square kilometers (including the area of the inflow area is 10,000 square kilometers). The basin has long winters and short summers, and the temperature difference between winter and summer is huge, and the seasonal temperature changes are distinct.

The Yellow River originates in the ancient Zonglie Basin at the northern foot of Bayankala Mountain on the Qinghai-Tibet Plateau, flows from west to east through nine provinces (autonomous regions) of Qinghai, Sichuan, Gansu, Ningxia, Inner Mongolia, Shanxi, Shaanxi, Henan and Shandong, and finally flows into the Bohai Sea. The precipitation in the basin is small, mainly dryland agriculture, dry in winter and dry in spring, and the precipitation is concentrated in summer, autumn, July and August.

The Yangtze River is the world's third largest river, the Yellow River is the world's fifth largest river, but the Yangtze River originates in the Tanggula Mountains of the Qinghai-Tibet Plateau, the Yellow River is the second longest river in China, and is the most important birthplace of Chinese civilization.

The Yellow River originates from the Zaqu of the Chahassila Mountain of the Bayankala Mountains of the Qinghai-Tibet Plateau of Qinghai Province, the Kariqu of the northern foot and the ancient Zonglie Qu of the Xingsu Haixi, which is in the shape of "several", flows through 9 provinces and regions such as Qinghai and Sichuan from west to east, and finally flows into the Bohai Sea, with a total length of about 5,464 kilometers and a basin area of about 10,000 square kilometers. The upper reaches of the excavation are mainly mountainous, and the middle and lower reaches are mainly plains and hills. Because the middle section of the river flows through the Loess Plateau region of China, it carries a large amount of sediment, so it is also known as the river with the most sediment content in the world.

The Yellow River, a major river in northern China, has a total length of about 5,464 kilometers and a basin area of about 752443 square kilometers. It is the fifth longest river in the world and the second longest river in China.

The Yellow River is the main birthplace of Chinese civilization, and the Chinese call it the "Mother River". Every year, 1.6 billion tons of sediment are produced, of which 1.2 billion tons flow into the sea, and the remaining 400 million tons remain in the lower reaches of the Yellow River for many years, forming an alluvial plain that is conducive to cultivation.

The Yellow River is the mother river of the Chinese nation, and the Hukou Waterfall is a bright pearl embedded in the Yellow River, and it is also the only golden waterfall in the world, known as "the wonder of the world and the soul of China".

In recent years, the quality of cultural tourism services in Hukou Scenic Area has been continuously improved, and a series of cultural and tourist attractions such as Hukou Ancient Ferry Town and Yellow River Chorus Live Performance have been restored and created, accelerating the transformation and development of Hukou Scenic Area in a global, panoramic and all-weather manner.

The Hukou Waterfall of the Yellow River rushes and roars, highlighting the magnificent and ghostly natural wonders of the Yellow River, and is a self-sourced and cultural heritage shared by the people of Yan'an, Shaanxi, China and even the world.

The gestation, birth and development of the Yellow River are subject to geological processes in the geohistorical period, with the tectonic movement of Bilun generated by crustal changes as the external force, and the erosion, transport and accumulation under hydrological conditions as the internal force.

In the course of the history of Chenghe, the movement has been continuous and advancing with the times. Soil erosion on the Loess Plateau and sediment accumulation in the lower reaches of the Yellow River have been going on since prehistoric geological times, and the impact of human activities has been increasing since then.

According to various studies, the PaleoYellow River has three stages of development: the Early Pleistocene from the Tertiary to the Quaternary is the gestation period of the PaleoYellow River. In the Middle Pleistocene of the Quaternary Period (1.15 million years ago and 100,000 years ago), the ancient Yellow River was born and grew in the period.

In the Late Pleistocene (100,000 years ago, 10,000 years ago), the Yellow River formed an ocean system.

During the historical period, the river course of the Yellow River in the upper and middle reaches of the plain has also evolved, and some of the changes are still great. For example, the Hetao section of Inner Mongolia, before 1850, it is mainly divided into two branches, the north branch is the main stream, the foot of the Yin Mountain is called the Wujia River, and the south branch is the Yellow River today.

In 1850, the lower reaches of the Wujia River north of Xishanzui were silted up and cut off for about 15 kilometers, and the south branch became the mainstream, and the north branch became the retreat canal in the Houtao irrigation area. The swing of the Longmen Tongguan river is also larger.

However, the evolution of these sections has little impact on the development of the Yellow River as a whole. The course change of the Yellow River mainly occurs in the lower reaches.

Historically, the range of river changes in the lower reaches of the Yellow River has roughly reached the Haihe River in the north and the Jianghuai River in the south. According to historical records, the lower reaches of the Yellow River have flooded more than 1,500 times, and there have been more than 20 major diversions.