Q: Leave Chongqing on Friday night or Saturday morning, go to Wushan Little Three Gorges, Baidicheng and Fengdu, and return to Chongqing. I will come back on Sunday.

The Yangtze River is the longest river in China, with a total length of 6,397 kilometers (the source of detachment), and is usually called the main stream of 6,300 kilometers. ? 1.8 million square kilometers, with a total drainage area of about1960 billion cubic meters/year. The length of the main stream of the Yangtze River and the sea ranks third in the world.

The Yangtze River breaks away from its source, and the Gladden Snow Mountain in Tanggula Mountain, the southwest border of Qinghai Province, flows into Tongtian River after being blocked by Yuan in the south of the Yangtze River for a long time, and flows south into Jinsha River between Batang River Estuary and Yibin City in Yushu County, Sichuan Province. Before the Yangtze River below Yibin, Yangzhou was formerly known as the Yangtze River. The Yangtze River flows through Tibet, Sichuan, Chongqing, Yunnan, Hubei, Hunan, Jiangxi, Anhui, Jiangsu and other provinces and cities and joins the East China Sea in Shanghai. Tributaries such as Yalong River, Minjiang River, Tuojiang River, Jialing River, Wujiang River, Xiangjiang River, Hanjiang River, Ganjiang River, Qingyijiang River and Huangpu River. The Beijing-Hangzhou Grand Canal is located in Zhenjiang City, Jiangsu Province.

In Yichang City, Hubei Province, there are many rapids in the upper reaches of the Yangtze River. The middle reaches from Yichang to Hukou, Jiangxi, winding and numerous lakes (Poyang Lake and Dongting Lake are the largest); Downstream of Hukou, the river is wide, and Chongming Island is alluvial at the estuary. The Yangtze River is rich in water and water resources, with a container period of 10,000 tons, which can pass through Wuhan and the ferry can be traced back to Yichang.

The Yangtze River Basin is the economic prosperity of densely populated areas in China, and it is also an important city along the Yangtze River, such as Chongqing, Wuhan, Nanjing and Shanghai.

The hydropower development of the Yangtze River provides a total of 200 million kilowatts of electricity, making it the richest river in China. More than 2,800 kilometers, known as the "golden waterway", is the navigable mileage of the Yangtze River.

The Yangtze River is a magnificent and steep section of the Three Gorges (Qutang Gorge, Wuxia Gorge and Xiling Gorge) from Fengjie, Chongqing to Yichang, Hubei. It is the largest water conservancy control project in the world, and the Three Gorges Project is located in Sandouping in the middle of Xiling Gorge.

The Yangtze River is the longest river in China and the largest river in the world. It is the mainstream with a total length of more than 6,300 kilometers in the southwest of the main peak of Tanggula on the Qinghai-Tibet Plateau, and originated from (33 28' north latitude and 965 438+0 08' east longitude). It passes through blue, Tibet, Sichuan, Yunnan, Hubei, Hunan, Jiangxi, Anhui, Jiangsu and Shanghai 10 provinces, municipalities and autonomous regions, and enters the mainstream of the East China Sea. The total length of the source is about 6,300 kilometers (in terms of songs, the total length of the Yangtze River is 6,403 kilometers), ranking third in the world and first in the country. Is the basin between 24 30' north latitude? East longitude is 35 45 ′, 90 33 ′ to112 25 ′, covering an area of over 1.8 million square kilometers (excluding Huaihe River Basin), accounting for about 1.5 of the total land area. The annual discharge into the sea reaches 1 trillion cubic meters, ranking first in China and third in the world. In ancient times, Jiang and Liu Zhi said that the Yangtze River Delta and the Yangtze River Basin.

Files with different names of the tributaries of the mainstream Yangtze River: at the source, the bend mouth (the song of Tibetan River) said Tuotuo was the positive source of the Yangtze River, with a length of 358 kilometers; When the Batang estuary in Yushu County, Qinghai Province is called Tongtianhe River, the Batang estuary with a length of 8 13km reaches Yibin, the Minjiang estuary in Sichuan Province is called Jinsha River, which is 2308km long, and the Minjiang estuary in Yibin reaches the Yangtze River estuary, which is about 2800km long. From Yibin to Yichang to Hubei Province, it is commonly known as the Yangtze River. "Chuanjiang (Fengjie to Yichang Three Gorges to Xiajiang) and Hubei Province radiate to Chenglingji, Hunan Province."

? The tributary and basin area of the Yangtze River 1 10,000 square kilometers; Yalong River, Minjiang River, Dadu River, Jialing River, Wujiang River, Yuanjiang River, Xiangjiang River, Hanjiang River, Ganjiang River and its tributaries, Yalong River, Minjiang River, Jialing River and Hanjiang River, have been revised to 50,000 square kilometers, exceeding 65,438+10,000 square kilometers, and the largest Jialing River basin area is about160,000 square kilometers.

Most of the freshwater lakes in China are located in the middle and lower reaches of the Yangtze River. Poyang Lake, Dongting Lake, Taihu Lake and Chaohu Lake.

The Yangtze River originates in the southwest of Gladin, the main peak of Tanggula between the Bayan Kara Tanggula Mountains on the Qinghai-Tibet Plateau, where glaciers are a wide source of melted water. People at the source of the Yangtze River in Haikou can be divided into three parts. Yibin in Sichuan to Yibin in the upper reaches of Yichang in Hubei, and Yichang in the lower reaches. The upper reaches are about 3,500 kilometers long, and the Chuma River is the source north of the Yangtze River. It takes a long time for the wooden halogen tungsten lamp to reach the source of the Yangtze River in southern Jiangsu, and appropriate water should be added. According to the principle of "CD walks at the source of the Yangtze River", Tuotuo River, the longest tributary, is the source of the Yangtze River, because from the mouth of Dangqu River to Tongtian River in Yushu, Qinghai, the river is wide, reaching 8 13 km, nourishing the skin. Because Yushu to Yibin is called Jinsha River, which is called Lishui in ancient times. It is near Shigu in Yunnan, a north-south Hengduan mountain range. Yibin to Chongqing is called the middle reaches of the Yangtze River, with a total length of about 1 10,000 kilometers. Because it flows through the Sichuan Basin, it is commonly known as Chuanjiang, and it is a rather tortuous river from Yibin to Chongqing. Fengjie county Bai Di starts from Nanjinguan in Yichang in the north, and some mountains and rivers at the junction of Sichuan and Hubei flow through the Grand Canyon. From west to east, Qutang Gorge, Wuxia Gorge and Xiling Gorge are collectively called the Three Gorges of the Yangtze River, with a total length of 204 kilometers. The faster water flow on the beach and the great decline of the river. Since ancient times, they have been called the natural barriers of the Yangtze River. The gap of the long river about 1850 km in the downstream reaches is very small, and the slow-flowing river is very wide, generally more than two kilometers, with the narrowest point of 650 meters. The river twists and turns, especially from Zhijiang in Hubei to Chenglingji in Hunan. For some people, Jingjiang City has an ancient name, which is called "Jiuqu Ileum Theory". Slow water flow and sediment deposition are likely to lead to flood disasters caused by levee breaches in flood season. Since ancient times, there has been a saying of "Jingjiang Yangtze River Protection". From Yichang to Wuhu, there are many lakes on both sides of Dongting Lake and Poyang Lake. Dongting Lake is the natural reservoir of the Yangtze River. This river belongs to Jiangsu, which hinders the mountains that bypass Ningzhen Mountain in the northeast. From Youliang to the south, Zhenjiang enters the delta region, with flat terrain, dotted lakes, intertwined waterways and criss-crossing water networks. The estuary is actually 80 kilometers, which is a spectacular scenery connected by rivers and seas. The Yangtze River is more beautiful than Alexandria, with many tourist attractions. In the long-term process, the basin is wide, the land is fertile, the irrigation facilities are perfect, and the "land of abundance" in the middle reaches and the "land of plenty" in the lower reaches are rich in resources. China is the cradle of nationalities in the Yellow River Basin. According to historical records, the Yangtze River valley has become the focus of China's historical and cultural development after passing through the Yellow River in Zhiyang, Zhou Wuwang. There are many cities along the river, such as Chongqing, Yichang, Wuchang, Nanjing and Shanghai. Shanghai is the largest industrial and commercial city in China. Both sides have a lot of interesting and valuable information about the history of China, as well as many myths and legends, which are the precious heritage of China literature. In the south of China, the Yangtze River is more than 800,000 kilometers long, and it has been the main water traffic artery from east to west, vertically and horizontally, and from north to south since ancient times. A 10,000-ton ship can reach 3,000 tons from Nanjing to Hankou, 10,000-ton ship can reach Chongqing, and 500 tons can pass through Yibin.

The coastal plain in the middle and lower reaches of the Yangtze River is located in the east of China, the Three Gorges of the Yangtze River and the Yangtze River Plain. Huaiyang Hill and Huanghuai Plain, the southern boundary of Jiangnan Hill, and the northern boundary of Zhejiang and Fujian Hill. The Yangtze River and its tributaries are alluvial. It covers an area of about 20 square kilometers. Low-lying, mainly above 50 meters above sea level. Jianghan Plain in Central Plains of Hubei, Dongting Lake Plain in Hunan (collectively referred to as Hubei and Hunan) and Poyang Lake Plain; The downstream plains include the plain along the Yangtze River in Anhui, Chaohu Plain in Anhui and the Yangtze River Delta in Jiangsu, Zhejiang and Shanghai. The climate belongs to a small part of the northern subtropical zone on the northern edge of the subtropical zone. Annual average temperature 14? 18℃, Leng Yue is 0? 5.5℃, the absolute minimum temperature is-10 to -20℃, and the average temperature in the hottest month is 27? 28℃, frost-free period 2 10? 270 days. Agricultural maturity or triple cropping, annual precipitation 1000? 1400 mm, concentrated in spring and summer. Zonal soil is only found in hilly land, yellow brown soil or yellow cinnamon soil. The red soil on the southern edge is mostly paddy soil on the plain. Developed agriculture, land reclamation rate (62.65438 0%, Jiangsu 45.6%), is an important grain, cotton and oil production base. Rich in rice, wheat, cotton, rape, silkworm, ramie and jute. Braided rivers crisscross and lakes are dotted, covering an area of 20,000 square kilometers, which is equivalent to the plain area. 10%。 Hubei, Hunan plain, large lakes, small lakes, * * * 10000 or more? The area1.20 thousand square kilometers, accounting for more than 20% of the area, and the lake plain1.30 thousand, where China Lake is located. The largest freshwater lakes, Poyang Lake, Dongting Lake, Taihu Lake and Chaohu Lake, like natural reservoirs in the Yangtze River, have the functions of regulating water storage and reducing flood peaks. Fish, shrimp, crab, lotus, water chestnut and reed are the world treasures and aquatic products of Chinese sturgeon, crocodile skin and bletilla striata, which occupy an important position. In China, they are called the land of plenty. It is one of the most economically developed regions, including Shanghai, Nanjing, Wuhan, Nanchang, Suzhou, Wuxi, Changzhou, Nantong, Wuhu and Changsha. The main industries are steel, machinery, electric power, textile and chemical industry, and it is an important industrial base. In the central area of plain human settlements? The north-south and east-west transportation networks are developed, and the land and water transportation is very developed. The Yangtze River crosses the border and becomes the artery of east-west water transport. Together with many tributaries, it forms a huge waterway network.

The alluvial delta of the Yangtze River Delta, where the China Yangtze River and Qiantang River flow into the sea. Including Jiangsu Province and Shanghai City, the southeast of the northeast of Zhejiang Province. Yes, part of the plain in the middle and lower reaches of the Yangtze River. With an area of about 50,000 square kilometers? The apex of the inch delta is in Zhenjiang, Yangzhou city line, and it reaches Xiaoyangkou in the north. South bank of Hangzhou Bay. Height 10 meters above sea level, 200 to 300 meters. It is scattered among low mountains (Huishan, Tianpingshan, Yushan, Cang Lang, etc.). ). The average annual sediment transport of the Yangtze River is 4 million to 9 million tons, and the sediment deposition of 28% in the Yangtze River basin is as high as 78% in individual years. Delta Air Lines will continue to extend to the sea in normal years. The ancient Shazui in Changzhou, Changshu, Taicang and Jinshan have an altitude of 4 to 6 meters south of the Yangtze River, and Yangzhou, Taixing and Rugao in Taizhou have an altitude of 7 to 8 meters along the ancient map. The ancient sand mouths in Jiangnan and Jiangbei have the highest stability in the post-glacial sea, which can be traced back to 2000. At that time, the mainstream Liaojiao mouth on the north bank of the Yangtze River and the sand mouth on the south bank spewed out and extended to the southeast, connecting with the sand mouth at the mouth of Qiantang River, and the sediment kept accumulating, moving forward from 1958 to 1973 every year on average 148 meters. North subtropical monsoon climate, abundant rainfall, vertical and horizontal waterways, lakes full of water. Fertile land, agricultural production of rice, cotton, wheat, rape, peanuts, silk, fish, shrimp, is one of the most densely populated areas in China. In the lower reaches of the Yangtze River and many important towns on both sides of the Shanghai-Nanjing line, such as Shanghai, Nanjing, Suzhou, Changzhou, Wuxi, Zhenjiang, Yangzhou, Taizhou and Nantong. Shanghai is the largest industrial and commercial city in China, a world-famous foreign trade port, Suzhou, Wuxi and other scenic spots and emerging industrial cities.

Yangtze river photo:/pic/111456102519546897 _ small.jpg.

The Yellow River, also known as the great river in ancient China, originated in People's Republic of China (PRC), the Bayan Kara Mountains in Qinghai Province, flowed through Qinghai, Sichuan, Gansu, Ningxia, Inner Mongolia, Shaanxi, Shanxi, Henan and Shandong, and finally flowed into nine provinces in Shandong Province, including Dongying City, Bohai Sea and Kenli County. With a total length of 5,464 kilometers, the Yangtze River is the second longest river in China. The Yellow River is the fifth longest river in the world.

The Yellow River reaches Hekou Town from its source, with an upstream channel length of 3,472 kilometers and a middle stream between Hekou Town in Tuoketuo County, Inner Mongolia Autonomous Region and Taohuayu in Zhengzhou, Henan Province, with a channel length of 1.206 kilometers. The lower reaches of Taohuayu River are 786 kilometers long. (The lower reaches of the Yellow River have different routes, so the Yellow River Water Conservancy Commission plans the zoning.) The Yellow River runs through the east and west, with a basin length of 1.900 km, an east-west direction and a north-south width of1.654,38+0.000 km. What is the total area? 752,443 square kilometers.

The annual average flow of the Yellow River 1774.5 cubic meters per second, the annual average natural runoff of the whole river is 5.8 billion cubic meters, the annual average runoff of the river basin is 77 mm, and the per capita cultivated land in the river basin is 324 cubic meters of water.

The Yellow River flows through the middle reaches of the Loess Plateau, where it throws a lot of sediment. It is a first-class tributary of the Yellow River in most rivers in the world. The annual maximum sediment discharge is 3965438+ 1 100 million tons (1933), and the maximum sediment concentration is 920? Kg/m3 (1977). The average sediment concentration of Sanmenxia Station for many years is about 6.5438+0.6 million tons, with an average sediment concentration of 35 kg/m3.

The average flow of the placanticline at an altitude of 4800 meters is 1774.5 cubic meters per second.

5464 kilometers of river basin area? 752,443 kilometers from Qinghai Province flows into Bohai Sea.

The Yellow River in China, which flows through the people of the whole country, is the mother river and the country of China. The cradle of Chinese civilization, the descendants of the blood clan, is a symbol of the national spirit and feelings of the Chinese nation.

Like a victorious lion, there is a dome on his back. The mountains are high and the valleys are deep, and the green and sweet provinces ring from the mountains of the Qinghai-Tibet Plateau. Across the Hetao Plain in Ningxia and Inner Mongolia, there is a rushing Yellow River in Shanxi and Shaanxi. At the foot of Huashan Mountain, the "Dragon" was broken, and it turned around and crossed the northern plain of China, where the Bohai Sea ran. ? More than 750,000 square kilometers? With a drainage area of 5,464 kilometers, it is the second largest river in China. It flows through 9 provinces and autonomous regions, gathering more than 40 major tributaries, and more than 65,438+0,000 people go to Sichuan. The average annual precipitation in the whole basin is about 400 mm, while the average annual runoff of the Yellow River is only 5.74 billion cubic meters, ranking eighth in the country. There are 2 million mu of cultivated land with a population of about 6.5438+0 million, plus the river basins along the lower reaches of Henan and Shandong. The Yellow River basin is rich in water resources and mineral deposits. People have worked hard here for generations, creating the cradle of splendid ancient culture-China.

There have always been different opinions about the origin of the history of the Yellow River. As early as the first half of the 7th century, its Kariqu was the source of the Yellow River, but it has not been confirmed. It was really in the Yuan Dynasty that the Qing Dynasty explored Heyuan and reached Xinghai at 1280 and 1704. Therefore, the parameter that Xinghai is the source of the river has been circulated for many years. Since the founding of New China, the Yellow River Conservancy Commission organized an expedition to the source of the Yellow River in August 1952, and listed Song as the source of the ancient Yellow River. In the past 20 years, mistakes have been made, but many people have questioned them. Until the summer of 1978, the investigation of Heyuan was organized again, and it was expanded to the field investigation in the source area, and it was determined that they were Zhaqu and Kariqu at the entrance of Sanhe in Heyuan City in the west of the area. In the shortest process of tying songs, a small amount of water can only be counted as a tributary song of the situation listed in Yogu. In the ancient case, the songs listed in the ancient case and the songs listed in the first song are nearly 30 kilometers long, with a watershed area of? More than 700 square kilometers, there are more than twice as much water. Therefore, on the basis of the Yellow River, Kariqu is determined to be a more adequate water source. Kariqu originated from every posture at the northern foot of Bayan Kara, the posture of Yashan at an altitude of 4800 meters. The water overflowed from several springs at the foot of Yashan Mountain, "Roaring Wan Li, stroking the cradle of the source of the Yellow River in Longmen, the Chinese nation.

BR/>； "The birthplace of the Yellow River, the 5,000-year-old culture of the Chinese nation, originated from you ..." This is the lyrics of the so-called song "Singing the Yellow River". Whenever people sing this song, the flooded Yellow River falls into endless memories.

Paleolithic ancestors lived and hunted in China countries in the Yellow River valley as early as 800,000 years ago, and collected more than 2,000 sites in primitive villages found in the Yellow River valley. It shows that the ancestors of the Neolithic Age settled in this vast land and engaged in primitive agricultural production.

In the middle of Neolithic Age, Huangdi tribe spread on the Loess Plateau in the middle reaches of the Yellow River, and then the ancient migration of Zhijia tribe and Yan Di tribe was uncertain, leading a nomadic life. Later, Yan Di and the Yellow Emperor attacked and killed the volunteers. Soon, people's Yan Di family and Huangdi tribe gradually merged and settled in the middle and lower reaches of the Yellow River, where Shaanxi, Gansu and Shaanxi developed together.

Xia, Shang and Zhou, who entered the slave society 3500 years ago, are descendants of the Yellow Emperor. They call themselves "China" or "Xia". China, the predecessor of the Han nationality, is regarded by the Han people as claiming that his ancestors are descendants of the Yellow Emperor (also known as "Yanhuang"). At that time, all ethnic groups in China lived in the Central Plains, and people thought that the Central Plains was in the quartet, also known as "China". Later, the national China culture spread to all parts of the country, and the word "China" became the name of the whole China.

For thousands of years, the feudal rule centered on the Yellow River Basin oppressed the constant struggle of the broad masses of working people. At the end of Qin Dynasty, Chen Sheng and Wu Guanghan performed the Red Eyebrows, the Bronze Horse and the Yellow Scarf Uprising, the Wagang Army at the end of Sui Dynasty, the Tang Dynasty, Huang Chao, Li Zicheng and Zhang at the end of Ming Dynasty. During War of Resistance against Japanese Aggression and the War of Liberation, Shaanxi-Gansu-Ningxia was a reliable revolutionary base for the people of China until the great People's Republic of China (PRC) was founded in New China.

In the long historical process, the Yellow River and the Chinese nation have nurtured Chinese sons and daughters and created splendid ancient culture. We are proud of the Yellow River singing.

The word "river" is basically the professional knowledge of the Yellow River in the pre-Qin, Qin and Han dynasties. Rivers are called "rivers" or "water" (but there are exceptions, such as Shan Hai Jing, he said: "Kunlun Mountain is widely distributed in Wan Li, thousands of miles high, and 50 kilometers to Haoshan, Qinghe, Baihe and Heihe." ) The Yellow River was not found in the pre-Qin literature? From the time point of view, Emperor Wu of the Han Dynasty recorded in a book that the whole chapter had not seen the Yellow River. According to the study? The word "Li Zhedong Yi" was first found in the explanation of the Yellow River text of Han Shu Geography Changshan Yuanshi County written by Ban Gu in the Eastern Han Dynasty. The "yellow" of the Yellow River is used to describe the turbid river, and it is also recorded in old books: In the Warring States Period, the poem "Zuo Zhuan Zheng Xianggong Crossing the Bazi Temple Yi Yin Zhou Shu" said, "Make the river clear as soon as possible! "Erya Shi Shui" records that "the river flows out of Kunlun, white in color, and yellow in color. "Xinghai passes through Zhaling Lake at the source of the Yellow River.

Linghu, Ezhou and many other places, such as Shuipo and Haizi, and countless lakes have dazzling stars. The local Tibetan residents are like a proud peacock, very beautiful and spectacular. During this period, the Yellow River was called "Maqu" (RMA train) and "Peacock River". Maqu County in Gansu Province is named after this river.

Hydrological Characteristics The source of the Yellow River originated in bayan har, Qinghai Province, but the real source is still controversial. There is a process in the history of the source river of the Yellow River.

People in Sui and Tang Dynasties gradually realized the establishment of the source of the Yellow River. Yang Di five years (609), Tuguhun Houheyuan County, Qinghai Guoluo Tibetan Autonomous Prefecture, Hainan Tibetan Autonomous Prefecture, a part of this area, today shows that people are called the birthplace of the Yellow River. In 2009 (635), Tang Zhenguan pacified Tuguhun rebel generals Hou Lijijun and Li Daozong, and he led his troops along the Tang Dynasty to Xinghai, including "the constellation Sichuan Province, Dabohai, and the Jishi Mountain View at the source of the river." Since the Tang and Song Dynasties, Chang Xinghai has been called the source of the Yellow River.

In the Yuan Dynasty, people began to investigate the source of the Yellow River. Kublai Khan of Yuan Shizu sent RMB for 27 years (1280) to be investigated by others in Heyuan and the upper reaches of the Yellow River. A detailed investigation was made, and the Record of Heyuan written in the book 13 15 is a true investigation. It is clearly pointed out that the Yellow River in the southwest 100 miles originated in Xinghai, and water gushed out from the ground, such as wells, for more than a hundred years. "

In the 40th year of Qing Emperor Kangxi (1704), Emperor Kangxi ordered Laxi to explore the source of the Yellow River. They went to Xinghai and found the Xinghai in the source of the Three Rivers, but they didn't pursue the source. Lacey, Lan Shu drew a map of Heyuan after returning to Beijing, and Lan Shu wrote "Remember Heyuan. At the end of Kangxi, the national topographic survey was organized. In 1967 (17 17), Emperor Kangxi sent Lama Chu Er to the main residences of Qinzangbu, Lan Zhan Mu, Bashe and Li Fanyuan to investigate the Heyuan area. There are many rivers along this line, which involves Wan Li. After returning to Beijing, the measurement results are drawn on the thumbnail of Huang Yu. Exploration and extraction of surveying and mapping at the source of Xinghai River. about

In the forty years of Qing Qianlong (1782), the goal of "Qianlong ordered the guards to pay tribute to Heyuan" was achieved in May. Three rivers from the source, 300 miles west of Xinghai, Ameida, were investigated in Xinghai, and the Guole River (now Kaliku) in Alstom, southwest of Xinghai was determined. The source of the Yellow River.

/kloc-From the 20th century to the early 20th century, western explorers and geographers went deep into the Qinghai-Tibet Plateau to collect natural and cultural information about the source areas they wanted to reach, such as France's Dudler in Akka, India, Varski in Russia, Zinagar, kozlov and Peck in Taiwan Province Province in Fishler, Germany.

Since the founding of the People's Republic of China, the source of the Yellow River has visited many times. 1952 was organized by the Yellow River Conservancy Commission, and Xiang Lizhi led the directors to explore the source of the Yellow River for several months. The Heyuan exploration and research team found that in ancient times, the songs listed were the source of the Yellow River Lada, the source of Yahao Zeshan, the source of Yeling Lake and the source of Zhaling Lake. This result is inconsistent with the previous research results, which has caused controversy in academic circles. But the Yellow River originated in ancient times and has been widely circulated. 1978, Qinghai Province invited central and local researchers to inspect the headwaters of the Yellow River and the two lakes of Zhaling Lake and Eling Gorge, and recognized that this song was the headwaters of the Yellow River, Zhaling Lake and Eling Gorge. From 198 1 to 1982, scholar Yang inspected the whole Yellow River. He believes that the farthest origin of the Yellow River began with Bayan Karajilang's love songs, which are 30.5 kilometers longer than the situation songs listed in ancient times and 1 1.9 kilometers longer than the Kari songs. From 65438 to 0985, the Yellow River Conservancy Commission determined Maqu County as the source of the Yellow River according to historical traditions and opinions from all sides, and in ancient times, the symbol of the source of Maqu songs and fruits of the Yellow River was established in the southwest corner of the drainage basin.

The upper and lower bounds of the Yellow River are different. Through investigation, it is considered that Taohuayu of Qingtongxia Yellow River Conservancy Committee divides the downstream town mouth, traditional middle school textbooks, Hekou town and the middle and lower reaches, and the division of life and death by scholar Yang is more suitable for scholars to advocate that Jiayingguan, Jiaozuo City and Wuzhi County in Henan Province are the dividing lines of the middle and lower reaches of the Yellow River. According to the zoning plan of the Yellow River Water Conservancy Commission.

Upstream "is located at the Yellow River Bridge in Hekou Town, Tuoketuo County, Lanzhou, and reaches the upper reaches of the Yellow River in Inner Mongolia, with a total length of 3,472 kilometers and a drainage area. The Yellow River basin is 386,000 square kilometers, accounting for 5 1.3%. Finally, the average proportion of the total drop of 3496 meters dropped to10 ‰; Reached a larger tributary (basin area 1000 square kilometers) for 43 years, accounting for 54% of the total river runoff; The annual sediment transport in the upper reaches only accounts for the whole river for many years, accounting for 8% of sand, water and sand. Clear seawater in the upper reaches of the Yellow River, such as Qingshan, Xiqiao and Nanshan in Anima, Qinghai, controls the S-shaped bend. The characteristics of the upper reaches of the Yellow River can be divided into three parts, the source valley and the alluvial plain.

Guide to Kariqu in Longyangxia-Heyuan section of Qinghai, Qinghai. The Heyuan section starts from Kariqu, passes through Xingsuhai, Zhaling Lake and Maduo Castle Peak of Erling Lake, bypasses Longyang Gorge, and reaches Anima Castle Peak and Xiguide in Qinghai. This section of the river flows through the plateau of three or four kilometers and twists and turns. Rivers are mostly lakes, swamps and wetlands, with clear water quality, stable water flow and large water production. The water storage capacity of Zhaling Lake, Eling Lake and Erhu Lake is 470 million cubic meters above sea level and 654.38+008 million cubic meters respectively. It is the largest plateau freshwater lake in China, with a time interval from Maduo to Qinghai Maqu. The Yellow River flows through the ancient basins and hills between Bayankala and Animaqing Mountains, with wide valleys and occasional canyons. In Longyangxia section of Guide, Qinghai, Maqu, Gansu Province, the Yellow River flows through alpine valleys, with rapid water flow and rich hydraulic resources. Baihe and Heihe rivers, tributaries of Minshan Mountain, flow into the Yellow River.

From Longyang Gorge to Qingtongxia in Qinghai, some canyon sections flow through the mountains, forming canyons and gullies. In the case of white, canyons are formed due to different rock properties: hard gneiss, granite and metamorphic rocks, Nanshan flora, loose sand shale and red rock series form gullies. Duan Longyang Gorge Jishi Gorge Liujiaxia Bapan Gorge? Reach the important agricultural areas in Weibei Loess Plateau, Southwest Shanxi, Shaanxi and Shanxi provinces. As we all know, Fenhe River, Luohe River, Jinghe River, Weihe River, Luo Yi River and Qinhe River are the main tributaries of this river, and they are the main sources of sediment in this river. The average annual or multi-year sediment discharge of the lower Yellow River is 5.5 million tons. This river runs from Yumenkou to Tongguan (that is, the small north main stream of the Yellow River) 132.5 km, with serious erosion and instability. Historically, the downstream crevasse floods frequently hit the hardest hit areas of the Chinese nation. Because the lower reaches of the Yellow River flow from southwest to northeast, the north freezes for the first time in winter, forming ice flood. It is easy to cause ice dam blockage, leading to violation of dikes, and the threat of ice flood is very serious. The Yellow River Estuary is located at the intersection of Bohai Bay and Laizhou Bay. After a new one was built, it was manually diverted to Qingshuigou silted channel at 1976.

Yellow River Lake, Erning Lake, Wuliangsuhai Lake, Erning Main Lake, Dongping Lake. The total length of the mainstream canyon is 1707 km, accounting for 3 1.2% of the total length of the mainstream.