Request: leave Chongqing on Friday night or Saturday morning, go to Wushan Little Three Gorges, Baidi City, Fengdu, and return to Chongqing. The program that will be back on Sunday.

The Yangtze River is China's longest, with a length of 6,397 kilometers (the source of the Tuo Tuo River), often referred to as 6,300 kilometers of mainstream. With more than 1.8 million square kilometers, the total watershed area averages about one hundred and ninety-six billion cubic meters to the sea each year. The length of the Yangtze River's main stream and into the sea ranks third in the world.

The Yangtze River from the source of the Tuo Tuo River, the southwest border of Qinghai Province, Tanggula Mountain Range, each Laldandong Snow Mountain, after a long period of time in the south of the Yangtze River Yuan blocked to go round the Tongtian River, south to Yushu County, Batang estuary below the Jinsha River to the city of Yibin, Sichuan Province, the Yangtze River, below the Yangtze River in Yibin, before the predecessor of the Yangzi River, Yangzhou. The Yangtze flows through Tibet, Sichuan, Chongqing, Yunnan, Hubei, Hunan, Jiangxi, Anhui, Jiangsu and other provinces and cities, and enters the East China Sea at Shanghai. The Yangtze River is tributary to the Yalong, Min, Tuo, Jialing, Wu, Xiang, Han, Gan, Qingyi and Huangpu Rivers, etc. It is intersected by the Beijing-Hangzhou Grand Canal. It intersects with the Beijing-Hangzhou Grand Canal in Zhenjiang City, Jiangsu Province.

In Yichang City, Hubei Province, the upper reaches of the Yangtze River, the water is rapid and many beaches; Yichang to the middle reaches of the development of Jiangxi Hukou, meandering, many lakes (Poyang Lake, Dongting Lake, the largest of the 2 lakes); Hukou lower reaches of the river, the river is wide, the mouth of the alluvial Chongming Island. The Yangtze River is rich in water and hydraulic resources, water container period, 10,000 tons of ships, can pass through Wuhan, the ferry can go up to Yichang.

The Yangtze River Basin is a densely populated region of China with a thriving economy, with important cities along the river such as Chongqing, Wuhan, Nanjing and Shanghai.

Hydroelectricity development on the Yangtze River provides a total of up to 200 million kilowatts, the richest of China's hydropower rivers. The navigable mileage of the Yangtze River is said to be more than 2,800 kilometers, known as the "Golden Waterway".

The Yangtze River runs from Fengjie in Chongqing to Yichang in Hubei Province as the majestic and steep Three Gorges section (Qutang Gorge, Wu Gorge and Xiling Gorge), the world's largest water conservancy hub project, the Three Gorges Project is located in the middle of Xiling Gorge in Sandouping.

The Yangtze River is China's longest and one of the world's largest rivers, with a total length of more than 6,300 kilometers of main stream on the southwest side of the main peak of the Tanggula Mountains in the Tibetan Plateau, the Geladandong Snow Mountain, originating at (latitude 33 ° 28' north, longitude 91 ° 08' east). The main stream passes through 10 provinces, cities and autonomous regions of Blue, Tibet, Sichuan, Yunnan, Hubei, Hunan, Jiangxi, Anhui, Suzhou and Shanghai, and enters the East China Sea. The total length of the source is about 6,300 kilometers (termed the Song of Songs when the total length of the Yangtze River is 6,403 kilometers) in the 3rd place in the world, ranking first in the country. The watershed lies between 24°30'?35°45' north latitude, 90°33' to 112°25' east longitude, with an area of more than 1.8 million square kilometers (excluding the Huaihe River basin), accounting for about 1/5 of the total land area. Annual average into the sea to 1 trillion cubic meters, ranking first in the country, the world's 3rd. Ancient river, six said, the Yangtze River Delta and the Yangtze River Basin.

The main stream of each division of the mainstream of the Yangtze River name different archives: when the source, the mouth of the curved (Tibetan River "song") said the Tuo Tuo River, the source of the Yangtze River, 358 kilometers long; when the mouth of the song of the Batang River, Yushu County, Qinghai Province, known as the Tongtian River, 813 kilometers long, the mouth of the Batang River to the mouth of the Minjiang River in Yibin, Sichuan Province, known as the Jinsha River, 2308 kilometers long, the Yibin River, the Yibin River, the Minjiang River, the Jinsha River, the Jinsha River. The length of 2308 kilometers, Yibin Minjiang River mouth to the mouth of the Yangtze River, about 2800 kilometers, commonly known as the Yangtze River Yibin to Yichang, Hubei Province, "Sichuan River (Fengjie to Yichang Three Gorges to reach the Gorges River, said), Hubei Province, radiating to the Hunan City of Lengji, said the Jingjiang City, Jiangsu Province, Yangzhou, Zhenjiang, Yangtze River Basin Plateau, the mountainous region accounted for 65.6% of the area, the hilly area accounted for 24% of the area, the plain and the lowlands (10.4%). 48.4% of the area is covered by the Yangtze River. （

More than 10,000 square kilometers of Yangtze River tributaries, basin area; revised over 50,000 square kilometers Yalong River, Min River, Dadu River, Jialing River, Wu River, Yuan River, Xiang River, Han River, Gan River and its tributaries Yalong River, Min River, Jialing River, Han River, more than 100,000 square kilometers, the largest of the Jialing River watershed area of about 160,000 square kilometers.

Most of the freshwater lakes in China are located in the middle and lower reaches of the Yangtze River, with larger areas of ? Poyang Lake, Dongting Lake, Tai Lake and Chaohu Lake.

The Yangtze River originates on the southwest side of the Tanggula Mountains, the main peak of the Tanggula range, between the Bayan-Ka-La Mountains and the Tanggula Mountains on the Tibetan Plateau, where glaciers are the source of extensive ice and snow melt water. Haikou Yangtze River from the source of the river people, can be can be divided into three parts. Sichuan Yibin upstream of Yibin to Yichang, Hubei, downstream of the middle reaches of Yichang, the upper reaches of the section of about 3,500 kilometers long, the Chumar River he is the source of the Yangtze River north of the Yangtze River; wood tungsten halogen lamps Su River in the south of the Yangtze River source, the process of the longer, add the right amount of water, in accordance with the "source of the river CD - go" principle, the longest tributary TuoTuo River is the source of the Yangtze River, because when the qu river mouth to Yushu in Qinghai Province during the period of the Tongtian River, 813 kilometers long river wide, moisturizing water, due to Yushu to Yibin known as the Jinsha River, the ancient name of the Lishui, from north to south through the flow of the Hengduan Mountains in Yunnan near the Shigu, off to the northeastern part of the Sichuan Basin and the Minjiang River confluence in Yibin, a total of 2,300 kilometers in length. Known as the middle reaches of the Yangtze River from Yibin downstream section of about 10,000 kilometers long, as it flows through the Sichuan Basin, commonly known as the Sichuan River, from Yibin to Chongqing, quite a winding river. Fengjie County Baidi Mountain Yichang Nanjin Pass onwards, some of the border zone between Sichuan and Hubei, crossing the Grand Canyon of the mountains, the river, from west to east Qutang Gorge, Wu Gorge and Xiling Gorge, collectively known as the Three Gorges of the Yangtze River, the total length of 204 kilometers, the beaches are more rapid currents, and the river descending is great, since ancient times, known as the Yangtze River's natural barriers. The downstream section of about 1850 kilometers of the Yangtze River gap is very small, slow-flowing river is very wide, generally more than two kilometers, 650 meters at the narrowest point. The river twists and turns, especially from Zhijiang in Hubei to Chenglingji in Hunan for some people, Jingjiang City, the ancient name is known as the "Nine Twists and Turns" said. Slow flow, sediment siltation, whenever the flood season, can easily lead to flood disasters, since ancient times, "the Yangtze River in Jingjiang City insurance" said. There are many lakes on both sides of the section from Yichang to Wuhu, Dongting Lake and Poyang Lake. Dongting Lake is the natural reservoir of the Yangtze River. The river is a mountain for Jiangsu, impeded by the Ningzhen Mountains to the northeast. Zhenjiang City below the preferential beam south, into the delta area, the terrain is flat, dotted with lakes, waterways intertwined like a net, water drive site. The mouth of the river is actually 80 kilometers, the spectacular scenery of the river and the sea are connected. The Yangtze River than Alexander Zee, beautiful scenery, there are many tourist attractions. Long process, the basin is wide, fertile land, irrigation facilities, the middle reaches of the "Land of Heaven" downstream "land of fish and rice" of the rich resources of the land. China in the Yellow River Basin is the cradle of the nation, according to historical records, after King Wu of Zhou Mieyan southern Yangtze River Basin area, after the Yellow River, the Yangtze River Basin has become the focal point of China's historical and cultural development. There are many cities along the river, such as Chongqing, Yichang, Wuchang, Nanjing, Shanghai and so on. Shanghai is the largest industrial and commercial city in China. There are many places on both sides of the river that are of interest to Chinese history and have valuable information about it, and there are also many myths and legends that are a valuable heritage of Chinese literature. The main tributaries of the Yangtze River in southern China have been the arteries of water transportation from east to west, vertically and north-south since ancient times, with a total length of more than eight hundred thousand kilometers of waterways. A 10,000-ton ship can reach 3,000 tons from Nanjing to Hankou, a 10,000-ton ship to Chongqing, and a 500-ton ship can pass through Yibin.

The lower and middle reaches of the coastal plains east of China's Yangtze River Three Gorges Yangtze River Plain. Huaiyang Hills and Huanghuai Plain, the southern boundary of the Jiangnan Hills, Zhejiang, Fujian and the northern boundary of the Hills. Alluvial by the Yangtze River and its tributaries. The area is about 20 square kilometers. The terrain is low-lying, mainly 50 meters above sea level. The central plains are the Jianghan Plain in Hubei, the Dongting Lake Plain in Hunan (collectively Hubei and Hunan), and the Poyang Lake Plain; the downstream plains include the Yangtze River coastal plain in Anhui, the Chaohu Plain in Anhui, and the Yangtze River Delta in Jiangsu, Zhejiang, and Shanghai. The climate belongs to the subtropical northern edge of the northern subtropical part. The average annual temperature of 14?18 ℃, the coldest month of 0?5.5 ℃, the absolute minimum temperature of -10 to -20 ° C, the hottest month average temperature of 27?28 ℃, frost-free period of 210?270 days. Agriculture is ripe or triple ripe, with annual precipitation of 1000?1400 mm, concentrated in spring and summer. Zonal soils are found only in the hilly slow hillocks, yellow-brown loam or yellow-brown soil. The southern edge of the red soil, the plains are mostly rice soil. With well-developed agriculture and a land reclamation rate (62.1%, 45.6%, Jiangsu), it is an important grain, cotton and oil production base. It produces rice, wheat, cotton, rape, silkworms, ramie and jute. Braided rivers crisscross the lake swings dotted with lakes covering an area of 20,000 square kilometers, equivalent to 10% of the plains. Hubei and Hunan plains, larger lakes, small lakes, *** more than 10,000?12,000 square kilometers of area, accounting for more than 20% of the area, there are more than 1,300 lakes in the plains, is the place of Chinese lakes. The largest freshwater lake Poyang Lake, Dongting Lake, Taihu Lake, Chaohu Lake and the Yangtze River's natural reservoir to regulate the water, cut the role of floods connected, fish, shrimp, crabs, lotus, rhombus, reeds, is the Chinese sturgeon, crocodile skins, Bletilla, the world's treasures, aquatic products occupy an important position in China, known as the land of fish and rice. It is one of the most economically developed areas of Shanghai, Nanjing, Wuhan, Nanchang, Suzhou, Wuxi, Changzhou, Nantong, Wuhu, Changsha and other cities. The main industries are iron and steel, machinery, electric power, textile, chemical industry, is an important industrial base. The plains of Habitat Center area? North-south and east-west transportation network, land and water transportation is very developed. The Yangtze River passes through the country, becoming the main artery of east-west water transportation, together with countless tributaries, constituting a huge waterway network.

China's Yangtze River and Qiantang River into the sea of the Yangtze River Delta alluvial delta. It includes Jiangsu Province and Shanghai Municipality, and the southeastern part of northeastern Zhejiang Province. It is part of the middle and lower reaches of the Yangtze River Plain. It covers an area of about 50,000 square kilometers. miles. The apex of the delta is at the city line of Zhenjiang and Yangzhou, north to Xiaoyangkou. It is bordered by Hangzhou Bay to the south. The height exceeds 10 meters, with an elevation of 200 to 300 meters above sea level, and spreads between low mountains (Huishan, Tianpingshan, Yushan, Gray Wolf, etc.). The average annual sand transport of the Yangtze River is 4 to 9 million tons, 28% of the sediment deposited in the Yangtze River Basin in individual years up to 78%, and Delta Air Lines will continue to extend into the sea in normal years. Gushazui elevation, Changzhou City, Changshu City, Taicang City, Jinshan County, more than 4 to 6 meters south of the Yangtze River, north of the Yangtze River, Taizhou City, Yangzhou City, Taixing City, Rugao City, along the ancient spit elevation of 7-8 meters. Jiangnan and north of the ancient sand spit is the highest ice late sea stabilization gradually developed into can be traced back to 2000, when the mainstream of the north bank of the Yangtze River Liaojiao mouth, the south bank of the sand spit out of the southeast extension of the sand spit with the mouth of the Qiantang River connected to the mud and sand continue to pile up from 1958 to 1973, an average of 148 meters per year forward. North subtropical monsoon climate, abundant rainfall, waterways, lakes and swings all over the place of water injection. The land is fertile, with agricultural production of rice, cotton, wheat, rape, peanuts, silk, fish, shrimp, and is one of the most densely populated areas in China. The lower reaches of the Yangtze River and Shanghai are flanked by many important towns on both sides of the Shanghai-Nanjing line, such as the cities of Shanghai, Nanjing, Suzhou, Changzhou, Wuxi, Zhenjiang, Yangzhou, Taizhou, and Nantong. Shanghai is the largest industrial and commercial city in China and a world-famous foreign trade port, while Suzhou, Wuxi and other scenic spots and tourist places and emerging industrial cities.

The Yangtze River Picture: /pic/1/11456102519546897_small.jpg

The Yellow River, also known as the River of Ancient China, originated in the People's Republic of China, and the country of China, the Ba Yan Ka La Mountains in Qinghai Province flow into Qinghai, Sichuan, Gansu, Ningxia, Inner Mongolia, Shaanxi, Shanxi, Henan, Shandong, and finally into Dongying City in Bohai Sea. It is injected into the Bohai Sea in Dongying City, Shandong Province, Dongying City, Kenli County, nine provinces. The Yangtze River has a total length of 5,464 kilometers, after being the second largest river in China. The Yellow River is the fifth longest river in the world.

The Yellow River from the source to the town of Hekou, the length of the upstream channel 3472 kilometers, the Inner Mongolia Autonomous Region Toketo County Hekou town to Henan Zhengzhou Peach Blossom Valley between the middle reaches of the river, the length of the river 1206 kilometers; Peach Blossom Valley lower reaches of the river length of 786 kilometers. (The Yellow River downstream boundaries in a different way, the Yellow River Conservancy Commission zoning plan) through the eastern and western regions, the basin length of 1900 kilometers from east to west, north-south width of 1100 kilometers of the Yellow River, a total area of ?752,443 square kilometers.

The average flow rate of the Yellow River for many years is one thousand seven hundred and seventy-four point five cubic meters per second, and the average natural runoff of the whole river for many years is 5.8 billion cubic meters, and the average annual runoff in the basin is 77 mm, and the average annual runoff in the basin is 593 cubic meters, and the average per capita of arable land in the basin is 324 cubic meters of water per acre.

The middle reaches of the Loess Plateau of the Yellow River flow through, put a lot of sediment, the sediment concentration of the Yellow River in most rivers in the world tributaries. The maximum annual sand input was 391 million tons (1933), the highest sand content 920?kg/m3 (1977). Sanmenxia station multi-year average sand content of about 16 million tons, an average of 35 kg / m3 silt content.

Long source elevation average flow 4800 meters 1774.5 cubic meters per second

Basin area of 5464 kilometers?752443 kilometers of the source of Qinghai Province into the Bohai Sea

Flow through the whole country **** and the country of China's Yellow River is the mother river, the country of China. Maintaining the birthplace of Chinese civilization, the descendants of the blood elephant, is the symbol of the national spirit and national feelings of the Chinese nation.

Like the spine up the dome of the victory of the lion jumping between the mountains and valleys deep, from the Tibetan Plateau of the lofty mountains and peaks ringing green, sweet provinces; across Ningxia, Inner Mongolia, the Hetao Plain, the Yellow River, Shanxi, Shaanxi presence; breaking the "dragon" at the foot of Mount Huashan, turning east across the plains of northern China, the Bohai Sea rush. The area is more than 750,000 square kilometers. The area is more than 750,000 square kilometers. Miles of watershed area, 5464 kilometers, is China's second largest river, which flows through nine provinces, autonomous regions, a collection of more than 40 major tributaries, more than 1,000 brooks Sichuan tourism. The average annual precipitation of the whole basin is about 400 millimeters, while the average annual runoff of the Yellow River is only 5.74 billion cubic meters, ranking eighth in the country in China's rivers. The total **** has 2 million acres of arable land and about 1 million people, plus downstream areas along Henan and Shandong in the watershed. The Yellow River Basin is rich in water resources and a large number of mineral deposits, and the people have worked hard here for generations, creating a splendid ancient culture in the cradle of the Chinese nation.

There have been various claims to the origin of the history of the Yellow River. As early as the first half of the 7th century A.D., it was said that the Kari Qu was the source of the Yellow River, but this has not yet been confirmed. It is true that during the Yuan Dynasty, the Qing Dynasty in 1280 and 1704 Laxi, exploring the source of the river reached the Xingjuhai. Therefore, the parameter of Xingxiuhai as the source of the river has been circulated for many years. Since the founding of New China, the Yellow River Conservancy Committee organized a river source expedition in August 1952, after putting the ancient case, the column song is the source of the Yellow River. For 20 years, the wrong is wrong, but there are many people questioned. Until the summer of 1978, once again organized the Heyuan expedition, extended to the source area of the site investigation to determine the import of the three rivers in the western part of the region Heyuan City, Xinghai they are Zaqu, about the ancient case of the listed songs and Kajiqu. The shortest Zaqu process, a small amount of water, can only be counted as a tributary of the song about the ancient listed situation. About the ancient situation, listed in the ancient situation, listed songs of songs and Ka Ri Qu Ka Ri Qu than nearly 30 kilometers long, the watershed area of more than 700 square kilometers, but also a large amount of water more than two times. Therefore, the determination of the Karriqu for the Yellow River is based on a fuller source. Karzhiqu originated in the northern foothills of Ba Yan Ka La mountain each posture Ya Mountain 4800 meters above sea level posture Ya Mountain foothills of the mountain several springs overflowing water, "roaring 10,000 miles to touch the Dragon Gate of the Yellow River initial flow of the cradle of the Yellow River, the Chinese nation

BR /> "the Yellow River originated, the Chinese nation, the 5000 years of the ancient culture. Originated from you ......" This is the lyrics of the so-called song "Singing the Yellow River". Whenever people sing this song, the submerged Yellow River falls into endless memories.

The Paleolithic era as early as 800,000 years ago the ancestors in the Yellow River Basin of China lived and lived in the hunting, collecting more than 2,000 ruins in the Yellow River Basin has been found in the primitive villages, which shows that in the Neolithic era the ancestors settled in this vast land, engaged in primitive agricultural production.

The mid-Neolithic era spread the Yellow Emperor tribe of the Loess Plateau in the middle reaches of the Yellow River, and then the Chi family, the Yandi tribe of the three tribes of the ancient migration of the uncertainty, they lived a nomadic life. Later, the Yandi Yellow Emperor attacked and killed Zhi united. Soon, the people of the Yandi family, the Yellow Emperor tribes gradually fused and settled in the region of Shaanxi, Gansu, Shanxi, **** with the development of the middle and lower reaches of the Yellow River.

3500 years ago into the slave society of the Xia, Shang, Zhou period, were the descendants of the Yellow Emperor, who called themselves "Chinese" or "summer". The Han Chinese, the predecessor of the ethnic Chinese, regarded the Yellow Emperor as the Yellow Emperor and claimed that their ancestors were descendants of the Yellow Emperor (also known as "Yan Huang"). At that time, the ethnic Chinese lived in the Central Plains region, which was believed to rank among the four directions, and it was also known as "China" in this regard. Later, the Chinese culture of the nation spread to all parts of the country, and the word "China" became the name of the whole of China.

For thousands of years, the Yellow River valley was the center of feudal rule, oppressing the struggles of the vast masses of working people continuously. Chen Sheng at the end of the Qin Dynasty, Wu Guanghan in the Yellow River Basin land curtains majestic historical period of the Red Eyebrows, Bronze Horse, Yellow Turbans Uprising, Sui Wagang Army, Wang Xianzhi, the Tang Dynasty, Huang Chao, the end of the Ming Dynasty, Li Zicheng, Zhang Xianzhong, etc., to carry out the scene of the drama. During the War of Resistance Against Japanese Aggression and the War of Liberation, Shaanxi, Gansu, and Ningxia were the reliable revolutionary bases of the Chinese people until the founding of the new China by the great Chinese people*** and state.

In the long course of history, the great Yellow River, fed the sons and daughters of the Chinese nation, the Chinese nation created a splendid ancient culture. Yellow River, Yellow River singing, we feel very proud.

"Interpretation of the name of the word "river" in the pre-Qin and Qin Dynasties, Qin and Han Dynasties is fundamentally the expertise of the Yellow River, the river, known as the "river" or "water" (but there are exceptions). " (but there are exceptions, such as the book "Classic of Mountains and Seas", he said: "Kunlun Mountain, longitudinal extensive thousands of miles, high case thousands of miles, go Artemisia Mountain 50 kilometers, the Green River, the White River, the Red River, the city of the Black River of the central market. ") did not find the pre-Qin literature of the Yellow River? Come to see, Han Wu Di Han Zheng Nian to a book record, the whole chapter has not seen the statement of the Yellow River. According to the study? s research, the term first appeared in the Eastern Han Ban Gu's "The Book of Han - Geography of Changshan - Yuanshi County," an explanation of the text of the Yellow River. The "yellow" of the Yellow River was used to describe the turbid river, which was also recorded in old books: during the Warring States period, "Zuo Zhuan - Xiang Gong Zheng Pan Bazi Silicon quoted in the Yi Zhou Shu" poem "said" as soon as the river water was clear! Life geometry! "Er Ya - interpretation of water" in the record "River out of Kunlun, color white, drainage and a thousand riders hundred and sichuan, yellow." Star Sea through the source of the Yellow River Zaling Lake

Ling Lake, E, a large number of water and sea, countless lakes dazzling star sea in the sunlight, like a proud peacock, very beautiful and spectacular local Tibetan residents during this period, the Yellow River is known as "Maqu" (RMA column), "Peacock River". meaning "Peacock River". The river was named after Maqu County, Gansu Province.

Hydrological characteristics of the source of the Yellow River originated in the Bayan-Ka-La Mountains of Qinghai Province, but the real source is still controversial. There is a process in the history of the source of the Yellow River.

Sui-Tang people gradually correctly recognized the source of the Yellow River was established. Emperor Yang's career five years (609) when the Tugukhun after Heyuan County, Qinghai Province, Goluo Tibetan Autonomous Prefecture, Hainan Tibetan Autonomous Prefecture, today part of the region, indicating that the people called the Yellow River's birthplace. Tang Zhenguan 2009 (635) to pacify the Tugukhun rebel general Lizhi um Hou Junji, Li Daozong, who led a detachment arrived at the Xinghai along the Tang contains the "Constellation of Sichuan Province times, Dabohai, looking for the concept of the source of the River Jixi Mountain browse. "Since the Tang, Song period, long Xinghai referred to as the source of the Yellow River.

To the Yuan Dynasty, people began to field study the source of the Yellow River. Yuan Shizu Kublai sent RMB 27 years (1280) to implement the investigation of others, the source of the river, the Yellow River on the Star Sea. Did a detailed investigation, 1315 Panang book written on the "Heyuan Zhi" Xiao is a real investigation clearly states that more than 100 miles southwest of the Yellow River originates in the Xinghai, where the water gushes out of the ground, such as wells, more than one hundred years old. "

Qing Emperor Kangxi 40 years (1704) ordered the Kangxi Emperor Laxi cooked rotten to explore the source of the Yellow River. They arrived at Xingjuhai and found the source of the three rivers Xingjuhai, but did not trace the source. Laxi, Shulan returned to Beijing to draw Heyuan city map, Shulan also wrote "Heyuan remembered. Kangxi in the late years of the organization of the national topographic survey, the Kangxi Emperor, in 1967 (1717) sent Lama Churqin Zangbu, Lanmu Zhanbacai and Lifan Yuan's main victory residence, Heyuan area of the survey, the line "more than the source of the river, involving 10,000 miles, after returning to Beijing after the results of the measurements drawn on the thumbnail map of the Huang Yu. Mapping Xinghai Heyuan explored and extracted.

Qing Qianlong 40 years (1782) of the Amida reached the "Qianlong Emperor ordered the gate guards to sacrifice the source of the river". Amida Xingjuhai 300 miles west of the source of the three rivers in the Xingjuhai field investigations, identified the Xingjuhai southwest of the Aleshtang Golle River (today's Kari Qu)? Yellow River source.

From the 19th century to the beginning of the 20th century, Western explorers and geographers traveled deep into the Tibetan Plateau, they have to reach the source area to collect natural, cultural information, such as the Indians Aka French Do DE Le, O London, Russian Differential Heat Varski, Chinas jar, Kozlov, German Fischer Taiwan Pei cough.

Since the founding of the People's Republic of China, the source of the Yellow River has been visited many times. Organized by the Yellow River Conservancy Commission in 1952, Xiang Lizhi led the directors to explore the source of the Yellow River for several months. The source of the river exploration research team found that the ancient case, the column song is the source of the Yellow River Lada, Yahaoze Mountain, its source on the Eling Lake, under the Zaling Lake. This result does not match with previous research results, caused controversy in the academic community, but the Yellow River originated in the ancient situation, the column song is widely spread. In 1978, Qinghai Province invited central and local researchers to investigate the source of the Yellow River and Zaling, Eling two lakes in the field, recognizing that the song is the source of the Yellow River, Zaling Lake, under the Goose Ridge. From 1981 to 1982, scholar Yang Liankang foot inspected the whole Yellow River. He believed that the farthest origin of the Yellow River started from Ba Yan Ka La Ridge Lalang Love Song, and it was longer than the ancient listed situation qu 30.5 kilometers in length, longer than the Kari qu 11.9 kilometers. In 1985, the Yellow River Conservancy Committee based on the historical tradition and the views of all parties, confirmed that Maqu County is the source of the Yellow River, and in the ancient situation, the southwest corner of the listed basin was established in the Yellow River Maqu song fruits source sign.

Boundary of the Yellow River on the downstream boundary in different ways. Through the examination after the Qingtongxia Yellow River Conservancy Commission Peach Blossom Valley division of the downstream of the town of the mouth of the traditional secondary school textbooks, the town of Hekou, Mengjin division, in the lower reaches of the, scholars Yang related to health, Mengjin division more appropriate scholars Xu Shao Li advocates, Henan Province, Jiaozuo City, Wuzhi County Jiaying Guan, the dividing line in the middle and lower reaches of the Yellow River. This paper to the Yellow River Conservancy Commission zoning plan.

The "upper reaches" of the Yellow River Bridge in Hekou Town, Toketo County, Lanzhou, reaches the upper reaches of the Yellow River in Inner Mongolia with a total length of 3,472 kilometers, and a watershed area of ?386,000 square kilometers in the Yellow River Basin, an area accounting for 51.3% of the total. The average proportion of the reach on a total drop of 3496 meters falls to 10‰; the reach converges into larger tributaries (basin area of thousands of square kilometers), 43 years old, accounting for 54% of the runoff of the whole river; the annual sand transport upstream only accounts for the whole river for many years, the sand, water, and the amount of sand is 8%, clear sea water Yellow River headwaters upstream of the river channel of the Animal Qing Mountains, West Ting Mountains, Qinghai South Mountain control S-shaped bends. The upper reaches of the Yellow River, the characteristics of the river, can be divided into three parts, the source section of the river canyon and alluvial plains.

From the Longyangxia Qinghai Qinghai Guide to the source section of the river Kariqu. The source section of the river begins from the Kari Qu through the Xingjuhai, Zaling Lake, Eling Lake Mado tilted mountains around through the Longyang Gorge to reach the Qinghai Anima Qing Mountains and the West Guide. This section of the river flows through three, four kilometers on the plateau, the river zigzag and zigzag meandering, both sides of the lakes, swamps, wetlands, the water is clear, stable water flow, water production. Reached in Zaling Lake, Eling Lake, 2 lakes above 4260 meters above sea level, in the water storage capacity of 470 million cubic meters of meters and 10.8 billion U.S. dollars cubic meters, is China's largest plateau freshwater lakes, Qinghai Mardo to Maqu interval, the Yellow River's flow through the Bayan Kara Mountains and the Animal Qing Mountains between the ancient basins and the hills, the river valley is wide, and occasional sections of the canyon. In the interval between Machu Qinghai Guide Longyangxia in Gansu, the Yellow River flows through high mountain valleys with turbulent currents and rich hydraulic resources. Origin of the Minshan tributary of the White River, the Black River into the Yellow River section.

From Qinghai Longyangxia to Qingtongxia part of the canyon section of the river flows through the mountains and hills, the formation of canyons, gullies, gullies white case, due to the different nature of the rocks forming the canyon: hard gneiss, granite and metamorphic rocks, southern mountainous areas of the system, pine sand shale, red rock system, the formation of gullies in the lot. Segment Longyangxia Jishi Gorge Liujia Gorge, Bapang Gorge, ? Reaching both sides of the loess plateau area of the northern Weiwei, southwestern Shanxi, Shaanxi, Shanxi and other provinces important agricultural areas. Has received the important tributaries of this river Fen River, Luo River, Jing River, Wei River, Yiluo River, Qin River, is the main source of sediment in the lower reaches of the Yellow River, a, multi-year average annual sand transport of 5.5 million tons. The river runs from Yumenkou to Tongguan (i.e., the small north trunk of the Yellow River), a 132.5-kilometer stretch of river that is severely eroded and very unstable from one side of the river to the other. Historically, the lower reaches of the river have been frequently flooded by river outbursts, which have been a major disaster area for the Chinese nation. As the lower reaches of the Yellow River flow north from southwest to east, it reaches freezing for the first time in winter in the north, forming a flood. It can easily lead to ice dam blockage, resulting in dike violation, the threat of flooding is very serious. The mouth of the Yellow River is located at the confluence of Bohai Bay and Laizhou Bay, shaping the new after the artificial diversion of the Qingshui Gully siltation of the river in 1976.

The Yellow River Lake, Eling Lake, Wuliangsu Sea, the main lake Gyaring, Dongping Lake. Accumulation of the mainstream canyon, the total length of 1707 kilometers, accounting for 31.2% of the total length of the main stream.