|Yellow River (黄河)|
The Yellow River at the Hukou Falls.
|States||Qinghai, Sichuan, Gansu, Ningxia, Inner Mongolia, Shaanxi, Shanxi, Henan, Shandong|
|Source||Bayan Har Mountains|
|- location||Yushu Prefecture, Qinghai|
|- elevation||4,800 m (15,748 ft)|
|- location||Kenli County, Shandong|
|- elevation||0 m (0 ft)|
|Length||5,464 km (3,395 mi)|
|Basin||752,000 km2 (290,349 sq mi)|
|- average||2,571 m3/s (90,794 cu ft/s)|
|The "Mother River" monument in Lanzhou|
|Postal Map||Hwang Ho|
The Yellow River (or Huang He) is the second-longest river in Asia after the Yangtze and the sixth-longest in the world at the estimated length of 5,464 km (3,395 mi). Originating in the Bayan Har Mountains in Qinghai province of western China, it flows through nine provinces and empties into the Bohai Sea near the city of Dongying in Shandong province. The Yellow River basin has an east–west extent of 1,900 kilometres (1,180 mi) and a north–south extent of 1,100 km (680 mi). Its total basin area is 742,443 square kilometres (286,659 sq mi).
The Yellow River is called "the cradle of Chinese civilization" as its basin—specifically, the Wei River Valley that cuts across the south of the long Ordos Loop—was the birthplace of ancient Chinese civilizations and the most prosperous region in early Chinese history. However, frequent devastating floods and course changes produced by the continual elevation of the river bed, sometimes above the level of its surrounding fields has also earned it the unenviable names "China's Sorrow" and "Scourge of the Sons of Han".
Early Chinese literature refers to the Yellow River simply as 河 (Old Chinese: *C.gˤaj), a character that has come to simply mean "river" in modern usage. The first appearance of the name 黃河 (Old Chinese: *N-kʷˤaŋ C.gˤaj; Middle Chinese: Hwang Ha) is in the Book of Han written during the Western Han dynasty (206 BC – AD 9). The epithet "yellow" describes the perennial color of the muddy water in the lower course of the river, arising from loess being carried downstream.
One of its older Mongolian names was the "Black River", as it runs clear prior to its entry onto the Loess Plateau, but the current name of the river among Inner Mongolians is Ȟatan Gol (Хатан гол, "Queen River"). In Mongolia itself, it is simply called the Šar Mörön (Шар мөрөн, "Yellow River").
Due to the high amounts of sediments carried, the river bed is higher than the adjacent ground surface behind the artificial levee, thus the Hunag He is know as the suspended river.
Prior to the advent of modern dams in China, the Yellow River was extremely prone to flooding. In the 2,540 years prior to AD 1946, the Yellow River has been reckoned to have flooded 1,593 times, shifting its course 26 times noticeably and nine times severely. These floods include some of the deadliest natural disasters ever recorded. Before modern disaster management, when floods occurred, some of the population might initially die from drowning but then many more would suffer from the ensuing famine and spread of diseases.
The cause of the floods is the large amount of fine-grained loess carried by the river from the Loess Plateau, which is continuously deposited along the bottom of its channel. The sedimentation causes natural dams to slowly accumulate. These subaqueous dams were unpredictable and generally undetectable. Eventually, the enormous amount of water has to find a new way to the sea and bursts out across the flat North China Plain, sometimes taking a new channel. The traditional Chinese response of building higher and higher levees along the banks sometimes also contributed to the severity of the floods: When flood water did break through the levees, it could no longer drain back into the river bed as it would after a normal flood as the river bed was sometimes now higher than the surrounding countryside. These changes could cause the river's mouth to shift as much as 480 km (300 mi), sometimes reaching the ocean to the north of Shandong Peninsula and sometimes to the south.
Another historical source of devastating floods is the collapse of upstream ice dams in Inner Mongolia with an accompanying sudden release of vast quantities of impounded water. There have been 11 such major floods in the past century, each causing tremendous loss of life and property. Nowadays, explosives dropped from aircraft are used to break the ice dams before they become dangerous.
Historical maps from the Spring and Autumn period and Qin Dynasty indicate that the Yellow River at that time flowed considerably north of its present course. These maps show that after the river passed Luoyang, it flowed along the border between Shanxi and Henan Provinces, then continued along the border between Hebei and Shandong before emptying into Bohai Bay near present-day Tianjin. Another outlet followed essentially the present course.
The river left these paths in 602 BC and shifted completely south of the Shandong Peninsula. Sabotage of dikes, canals, and reservoirs and deliberate flooding of rival states became a standard military tactic during the Warring States period. Major flooding in AD 11 is credited with the downfall of the short-lived Xin dynasty, and another flood in AD 70 returned the river north of Shandong on essentially its present course.
In 923 a desperate Liang general Tuan Ning again broke the dikes, flooding 1,000 square miles (2,600 km2) in a failed attempt to protect the Liang capital from the Later Tang. A similar proposal from the Song engineer Li Chun concerning flooding the lower reaches of the river to protect the central plains from the Khitai was overruled in 1020: the Treaty of Shanyuan between the two states had expressly forbidden the Song from establishing new moats or changing river courses.
Breaches occurred regardless: one at Henglong in 1034 divided the course in three and repeatedly flooded the northern regions of Dezhou and Bozhou. The Song worked for five years futilely attempting to restore the previous course – using over 35,000 employees, 100,000 conscripts, and 220,000 tons of wood and bamboo in a single year – before abandoning the project in 1041. The more sluggish river then occasioned a breach at Shanghu that sent the main outlet north towards Tianjin in 1048 and by 1194 blocked the mouth of the Huai River. The build up of silt deposits was such that even after the Yellow River later shifted its course, the Huai was no longer able to flow along its historic one. Instead, its water pools into Hongze Lake and then runs southward toward the Yangtze River.
A flood in 1344 returned the Yellow River south of Shandong, but not without devastation, both to the peasants of the area as well as the leaders of the empire. The Yuan dynasty was waning, and the emperor forced enormous teams to build new embankments for the river. The terrible conditions helped fuel rebellions that led to the founding of the Ming dynasty. The course changed again in 1391 when the river flooded from Kaifeng to Fengyang in Anhui. It was finally stabilized by the eunuch Li Xing during the public works projects following the 1494 flood.
The 1642 flood was man-made, caused by the attempt of the Ming governor of Kaifeng to use the river to destroy the peasant rebels under Li Zicheng who had been besieging the city for the past six months. He directed his men to break the dikes in an attempt to flood the rebels, but destroyed his own city instead: the flood and the ensuing famine and plague are estimated to have killed 300,000 of the city's previous population of 378,000. The once-prosperous city was nearly abandoned until its rebuilding under the Kangxi Emperor in the Qing Dynasty.
On 9 June 1938, during the Second Sino-Japanese War, Nationalist troops under Chiang Kai-Shek broke the levees holding back the river near the village of Huayuankou in Henan, causing what has been called a "war-induced natural disaster".[by whom?] The goal of the operation was to stop the advancing Japanese troops by following a strategy of "using water as a substitute for soldiers" (yishui daibing). The 1938 flood of an area covering 54,000 km2 (20,800 sq mi) took some 500,000 to 900,000 Chinese lives, along with an unknown number of Japanese soldiers. The flood prevented the Japanese army from taking Zhengzhou, on the southern bank of the Yellow River, but did not stop them from reaching their goal of capturing Wuhan, which was the temporary seat of the Chinese government and straddles the Yangtze River.
According to the China Exploration and Research Society, the source of the Yellow River is at 34° 29' 31.1" N, 96° 20' 24.6" E in the Bayan Har Mountains near the eastern edge of the Yushu Tibetan Autonomous Prefecture. The source tributuaries drain into Gyaring Lake and Ngoring Lake on the western edge of Golog Prefecture high in the Bayan Har Mountains of Qinghai. In the Zoige Basin along the boundary with Gansu, the Yellow River loops northwest and then northeast before turning south, creating the "Ordos Loop", and then flows generally eastward across the North China Plain to the Gulf of Bohai, draining a basin of 752,443 square kilometres (290,520 sq mi) which nourishes 140 million people with drinking water and irrigation.
The Yellow River passes through seven present-day provinces and two autonomous regions, namely (from west to east) Qinghai, Gansu, Ningxia, Inner Mongolia, Shaanxi, Shanxi, Henan, and Shandong. Major cities along the present course of the Yellow River include (from west to east) Lanzhou, Yinchuan, Wuhai, Baotou, Luoyang, Zhengzhou, Kaifeng, and Jinan. The current mouth of the Yellow River is located at Kenli County, Shandong.
The river is commonly divided into three stages. These are roughly the northeast of the Tibetan Plateau, the Ordos Loop and the North China Plain. However, different scholars have different opinions on how the three stages are divided. This article adopts the division used by the Yellow River Conservancy Commission.
The upper reaches of the Yellow River constitute a segment starting from its source in the Bayan Har Mountains and ending at Hekou Town (Togtoh County), Inner Mongolia just before it turns sharply to the south. This segment has a total length of 3,472 kilometres (2,157 mi) and total basin area of 386,000 square kilometres (149,000 sq mi), 51.4% of the total basin area. Along this length, the elevation of the Yellow River drops 3,496 metres (11,470 ft), with an average grade of 0.10%.
The source section flows mainly through pastures, swamps, and knolls between the Bayan Har Mountains, and the Anemaqen (Amne Machin) Mountains. The river water is clear and flows steadily. Crystal clear lakes are characteristic of this section. The two main lakes along this section are Lake Zhaling (扎陵湖) and Lake Eling (鄂陵湖), with capacities of 4.7 billion and 10.8 billion m³ (166 and 381 billion ft3), respectively. At elevations over 4,290 m (14,070 ft)) above sea level they are the two largest plateau freshwater lakes nationwide. A significant amount of land in the Yellow River's source area has been designated as the Sanjiangyuan ("'Three Rivers' Sources") National Nature Reserve, to protect the source region of the Yellow River, the Yangtze, and the Mekong.
The valley section stretches from Longyang Gorge in Qinghai to Qingtong Gorge in Gansu. Steep cliffs line both sides of the river. The water bed is narrow and the average drop is large, so the flow in this section is extremely turbulent and fast. There are 20 gorges in this section, the most famous of these being the Longyang, Jishi, Liujia, Bapan, and Qingtong gorges. The flow conditions in this section makes it the best location for hydroelectric plants.
After emerging from the Qingtong Gorge, the river comes into a section of vast alluvial plains, the Yinchuan Plain and Hetao Plain. In this section, the regions along the river are mostly deserts and grasslands, with very few tributaries. The flow is slow. The Hetao Plain has a length of 900 km (560 mi) and width of 30 to 50 km (19 to 31 mi). It is historically the most important irrigation plain along the Yellow River.
The part of the Yellow River (see Ordos Loop) between Hekou Town (Togtoh County), in Inner Mongolia and Zhengzhou, Henan constitutes the middle reaches of the river. The middle reaches are 1,206 km (749 mi) long, with a basin area of 344,000 square kilometres (133,000 sq mi), 45.7% of the total, with a total elevation drop of 890 m (2,920 ft), an average drop of 0.074%. There are 30 large tributaries along the middle reaches, and the water flow is increased by 43.5% on this stage. The middle reaches contribute 92% of the river's silts.
The middle stream of the Yellow River passes through the Loess Plateau, where substantial erosion takes place. The large amount of mud and sand discharged into the river makes the Yellow River the most sediment-laden river in the world. The highest recorded annual level of silts discharged into the Yellow River is 3.91 billion tons in 1933. The highest silt concentration level was recorded in 1977 at 920 kg/m³ (57.4 lb/ft3). These sediments later deposit in the slower lower reaches of the river, elevating the river bed and creating the famous "river above ground".
From Hekou to Yumenkou, the river passes through the longest series of continuous valleys on its main course, collectively called the Jinshan Valley. The abundant hydrodynamic resources stored in this section make it the second most suitable area to build hydroelectric power plants. The famous Hukou Waterfall is in the lower part of this valley, on the border of Shanxi and Shaanxi.
In the lower reaches, from Zhengzhou, Henan to its mouth, a distance of 786 km (488 mi), the river is confined to a levee-lined course as it flows to the northeast across the North China Plain before emptying into the Bohai Sea. The basin area in this stage is only 23,000 square kilometres (8,900 sq mi), a mere 3% of the total, because few tributaries add to the flow in this stage; nearly all rivers to the south drain into the Huai River, whereas those to the north drain into the Hai River. The total drop in elevation of the lower reaches is 93.6 m (307 ft), with an average grade of 0.012%.
The silts received from the middle reaches form sediments here, elevating the river bed. During 2,000 years of levee construction, excessive sediment deposits have raised the riverbed several meters above the surrounding ground.
Tributaries of the Yellow River include (upstream to downstream (?)
- White River (白河)
- Black River (黑河)
- Star River (湟水)
- Daxia River (大夏河)
- Tao River (洮河)
- Zuli River (祖厉河/祖厲河)
- Qingshui River (清水河)
- Dahei River (大黑河)
- Kuye River (窟野河)
- Wuding River (无定河/無定河)
- Fen River (汾河)
- Wei River (渭河)
- Luo River (洛河)
- Qin River (沁河)
- Dawen River (大汶河)
- Kuo River
The Wei River is the largest of these tributaries.
The Yellow River is notable for the large amount of silt it carries—1.6 billion tons annually at the point where it descends from the Loess Plateau. If it is running to the sea with sufficient volume, 1.4 billion tons are carried to the sea annually. One estimate gives 34 kilograms of silt per cubic meter as opposed to 10 for the Colorado and 1 for the Nile.
Its average discharge is said to be 2,110 cubic meters per second (32,000 for the Yangtze), with a maximum of 25,000 and minimum of 245. However, since 1972, it often runs dry before it reaches the sea. The low volume is due to increased agricultural irrigation, increased by a factor of five since 1950. Water diverted from the river as of 1999 served 140 million people and irrigated 74,000 km² (48,572 mi²) of land. The Yellow River delta totals 8,000 square kilometers (3,090 mi²). However, with the decrease in silt reaching the sea, it has been reported to be shrinking slightly each year since 1996 through erosion.
The highest volume occurs during the rainy season from July to October, when 60% of the annual volume of the river flows. Maximum demand for irrigation is needed between March and June. In order to capture excess water for use when needed and for flood control and electricity generation, several dams have been built, but their expected life is limited due to the high silt load. A proposed South–North Water Transfer Project involves several schemes to divert water from the Yangtze River: one in the western headwaters of the rivers where they are closest to one another, another from the upper reaches of the Han River, and a third using the route of the old Grand Canal.
Due to its heavy load of silt the Yellow River is a depositing stream – that is, it deposits part of its carried burden of soil in its bed in stretches where it is flowing slowly. These deposits elevate the riverbed which flows between natural levees in its lower reaches. Should a flood occur, the river may break out of the levees into the surrounding lower flood plain and adopt a new course. Historically this has occurred about once every hundred years. In modern times, considerable effort has been made to strengthen levees and control floods.
Hydroelectric power dams
Below is the list of hydroelectric power stations built on the Yellow River, arranged according to the first year of operation (in brackets):
- Sanmenxia Dam hydroelectric power station (1960; Sanmenxia, Henan)
- Sanshenggong hydroelectric power station (1966)
- Qingtong Gorge hydroelectric power station (1968; Qingtongxia, Ningxia)
- Liujiaxia Dam (Liujia Gorge) (1974; Yongjing County, Gansu)
- Lijiaxia Dam (1997) (Jainca County, Qinghai)
- Yanguoxia Dam (Yanguo Gorge) hydroelectric power station (1975; Yongjing County, Gansu)
- Tianqiao hydroelectric power station (1977)
- Bapanxia Dam (Bapan Gorge) (1980; Xigu District, Lanzhou, Gansu)
- Longyangxia Dam (1992; Gonghe County, Qinghai)
- Da Gorge hydroelectric power station (1998)
- Li Gorge hydroelectric power station (1999)
- Wanjiazhai Dam (1999; Pianguan County, Shaanxi and Inner Mongolia)
- Xiaolangdi Dam (2001) (Jiyuan, Henan)
- Laxiwa Dam (2010) (Guide County, Qinghai)
As reported in 2000, the 7 largest hydro power plants (Longyangxia, Lijiaxia, Liujiaxia, Yanguoxia, Bapanxia, Daxia and Qinglongxia) had the total installed capacity of 5,618 MW.
- Dongying Yellow River Bridge
- Shengli Yellow River Bridge (Dongying)
- Lijin Yellow River Bridge (Dongying)
- Binzhou Yellow River Road-Railway Bridge
- Binzhou Yellow River Highway Bridge
- Binzhou–Laiwu Expressway Binzhou Yellow River Bridge (Binzhou–Zibo)
- Huiqing Yellow River Bridge (Binzhou–Zibo)
- Jiyang Yellow River Bridge (Jinan)
- G20 Qingdao–Yinchuan Expressway Jinan Yellow River Bridge (Jinan)
- Jinan Yellow River Bridge
- Luokou Yellow River Railway Bridge (Jinan)
- Jinan Jianbang Yellow River Bridge
- Beijing–Shanghai High-speed Railway Jinan Yellow River Bridge (Jinan–Dezhou)
- Beijing–Taipei Expressway Jinan Yellow River Bridge (Jinan–Dezhou)
- Beijing–Shanghai Railway Jinan Yellow River New Bridge (Jinan–Dezhou)
- Pingyin Yellow River Bridge (Jinan-Liaocheng)
- Beijing–Kowloon Railway Sunkou Yellow River Bridge (Jining–Puyang)
- Juancheng Yellow River Highway Bridge (Heze–Puyang)
- Dongming Yellow River Highway Bridge (Heze–Puyang)
- Sanmen Yellow River Bridge (Sanmenxia)
- Hancheng Yumenkou Yellow River Bridge
- Yinchuan Yellow River Bridge (Yinchuan)
- Baotou Yellow River Bridge (Baotou)
- Dari Yellow River Bridge
Although Yellow River is generally less suitable for aquaculture than the rivers of central and southern China, such as the Yangtze or the Pearl River, aquaculture is practiced in some areas along the Yellow River as well. An important aquaculture area is the riverside plain in Xingyang City, upstream from Zhengzhou. Since the development of fish ponds started in Xingyang's riverside Wangcun Town in 1986, the pond systems in Wangcun have grown to the total size of 15,000 mu (10 km2), making the town the largest aquaculture center in North China.
A variety of the Chinese softshell turtle popular with China's gourmets is called the Yellow River Turtle (黄河鳖). Now-a-days most of Yellow River Turtles eaten in China's restaurants comes from turtle farms, which may or may not be located near the actual Yellow River. In 2007, construction started in Wangcun on a large farm for raising this turtle variety. With the capacity for raising 5 million turtles a year, the facility was expected to become Henan's largest farm of this kind.
On 25 November 2008, Tania Branigan of The Guardian filed a report "China's Mother River: the Yellow River", claiming that severe pollution has made one-third of China's Yellow River unusable even for agricultural or industrial use, due to factory discharges and sewage from fast-expanding cities. The Yellow River Conservancy Commission had surveyed more than 8,384 mi (13,493 km) of the river in 2007 and said 33.8% of the river system registered worse than "level five" according the criteria used by the UN Environmental Program.[dubious ] Level five is unfit for drinking, aquaculture, industrial use, or even agriculture. The report said waste and sewage discharged into the system last year totaled 4.29b tons. Industry and manufacturing made up 70% of the discharge into the river with households accounting for 23% and just over 6% coming from other sources.[which?]
Yellow River in culture
In ancient times, it was believed that the Yellow River flowed from Heaven as a continuation of the Milky Way. In a Chinese legend, Zhang Qian is said to have been commissioned to find the source of the Yellow River. After sailing up-river for many days, he saw a girl spinning and a cow herd. Upon asking the girl where he was, she presented him with her shuttle with instructions to show it to the astrologer Yen Chün-p'ing. When he returned, the astrologer recognised it as the shuttle of the Weaving Girl (Vega), and, moreover, said that at the time Zhang received the shuttle, he had seen a wandering star interpose itself between the Weaving Girl and the cow herd (Altair).
- Mother river, China's Sorrow, and cradle of Chinese civilization.
Traditionally, it is believed that the Chinese civilization originated in the Yellow River basin. The Chinese refer to the river as "the Mother River" and "the cradle of the Chinese civilization". During the long history of China, the Yellow River has been considered a blessing as well as a curse and has been nicknamed both "China's Pride" (simplified Chinese: 中国的骄傲; traditional Chinese: 中國的驕傲; pinyin: Zhōngguóde Jiāo'ào) and "China's Sorrow" (simplified Chinese: 中国的痛; traditional Chinese: 中國的痛; pinyin: Zhōngguóde Tòng).
- When the Yellow River flows clear.
Sometimes the Yellow River is poetically called the "Muddy Flow" (simplified Chinese: 浊流; traditional Chinese: 濁流; pinyin: Zhuó Liú). The Chinese idiom "when the Yellow River flows clear" is used to refer to an event that will never happen and is similar to the English expression "when pigs fly".
"The Yellow River running clear" was reported as a good omen during the reign of the Yongle Emperor, along with the appearance of such auspicious legendary beasts as qilin (an African giraffe brought to China by a Bengal embassy aboard Zheng He's ships in 1414) and zouyu (not positively identified) and other strange natural phenomena.
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