Yellow River

• 1. Introduction

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  The Yellow River has carried two contradictory nicknames for centuries: "China's Pride" and "China's Sorrow". It is the sixth-longest river system on Earth, stretching an estimated 5,464 kilometers from the Bayan Har Mountains to the Bohai Sea. Along the way it picks up so much fine-grained sediment from the Loess Plateau that its water turns the color of mud, and it deposits that burden along its bed until the river literally rises above the surrounding land. At Kaifeng in Henan Province, the riverbed sits 10 meters above street level. What drives a river to behave that way? Why does one waterway become both the cradle of a civilization and the instrument of its most catastrophic disasters? And how have generations of rulers, engineers, rebels, and soldiers tried to govern something that ultimately refuses to be governed?

• 2. A River Above the Ground

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  From Zhengzhou to its mouth, the lower Yellow River runs through a levee-lined corridor across the North China Plain for 786 kilometers, emptying into the Bohai Sea. The middle reaches contribute 92 percent of the river's silt, and the highest annual silt load ever measured was 3.91 billion tons in 1933. When that silt settles in the slower-moving lower reaches, the riverbed rises. It rises until the river runs higher than the fields and cities on either side. The 1977 silt-concentration reading of 920 kilograms per cubic meter is roughly 92 times more sediment per unit of water than the Nile carries. Traditional Chinese engineers responded to a rising bed by building higher levees. The strategy was self-defeating: when a flood did overtop or breach those levees, the water could no longer drain back into the channel, because the channel was now elevated above the plain. The flood then spread unchecked until it found a lower path to the sea, sometimes taking a route hundreds of kilometers from the old one.

• 3. Floods That Reshaped History

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  In 602 BC, during the fifth year of King Ding of Zhou's reign, the river burst its banks at Suxu Mouth in Liyang and carved an entirely new path to the sea. That was the first major course change recorded since the legendary engineer Yu the Great tamed the floods millennia earlier. Between 595 BC and 1946 AD, a span of 2,540 years, the river flooded 1,593 times; it shifted course noticeably 26 times and severely nine times. The deadliest of those floods rank among the worst natural disasters ever recorded. The 1887 flood during the Qing dynasty killed between 900,000 and 2 million people, making it the second-worst natural disaster in history, not counting famines and epidemics. The 1931 flood killed an estimated 1,000,000 to 4,000,000 people, the worst recorded flood in terms of lives lost. Upstream in Inner Mongolia, collapsing ice dams have triggered 11 major floods in the past century alone, each releasing vast quantities of impounded water in a sudden surge. Today, aircraft drop explosives to break the ice before the dams grow dangerous.

• 4. Weaponized Water

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  On the 9th of June 1938, Kuomintang troops under Chiang Kai-shek broke levees near the village of Huayuankou in Henan, deliberately releasing the river to stop the advancing Japanese Army. Canadian historian Diana Lary has called it a "war-induced natural disaster". The strategy was described at the time as "using water as a substitute for soldiers". The flood covered 54,000 square kilometers and killed between 500,000 and 900,000 Chinese civilians, along with an unknown number of Japanese soldiers. It did prevent the Japanese from taking Zhengzhou, but they still captured Wuhan, the temporary seat of the Chinese government. The Kuomintang never publicly admitted responsibility, instead blaming Japanese warplanes for bombing the dikes; both Japan and the international press publicized China's culpability, but domestic newspapers, including Communist ones, maintained the official line for the duration of the war. The deliberate use of the river as a weapon had precedents. During the Warring States period, sabotage of dikes and canals and the intentional flooding of rival territories were standard military tactics. In AD 923, the Later Liang general Duan Ning broke dikes and inundated 1,000 square miles in a failed attempt to protect his capital. In 1128, Song troops under the Kaifeng governor Du Chong breached the river's southern dikes to halt the advancing Jin army, sending the Yellow River south of the Shandong Peninsula for the first time in recorded history.

• 5. The Southern Course

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  From 1128 to 1855, the Yellow River did not flow toward the Bohai Sea. Du Chong's 1128 breach sent it into the Huai River system, and it emptied into the Yellow Sea off the coast of what is now northern Jiangsu Province instead. By 1194, silt deposits had blocked the mouth of the Huai River entirely. The Huai has never fully recovered: its water now pools into Hongze Lake before draining southward toward the Yangtze rather than following its historic course. The 1344 flood returned the Yellow River south of Shandong while the Yuan dynasty was already weakening; the emperor conscripted enormous teams to build new embankments, and the brutal conditions helped fuel the rebellions that eventually brought down the dynasty and gave rise to the Ming. During the 16th century the river flooded repeatedly, including in 1526, 1534, 1558, and 1587. The 1642 flood was deliberately caused by the Ming governor of Kaifeng, who ordered his men to break the dikes in an attempt to drown the peasant rebel Li Zicheng and his forces, who had been besieging the city for six months. The flood and the famine and plague it unleashed are estimated to have killed 300,000 people out of a previous city population of 378,000. Kaifeng was nearly abandoned until the Kangxi Emperor oversaw its rebuilding during the Qing dynasty. The river finally returned to a northern course between 1851 and 1855, amid the flooding that also helped provoke the Nien and Taiping Rebellions.

• 6. The Politics of Control

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  Geographer Charles Greer identified two competing schools of thought on managing the Yellow River. One, which he associates with Confucianism, advocated high levees to maximize the cultivated land alongside the river. The other, which he links to Taoism, favored lower levees spread 5 to 10 kilometers apart, allowing the river more room to move. This debate played out in real political battles. During the reigns of the Renzong and Shenzong emperors in the 11th century, officials fought openly over whether expensive measures should be taken to force the river back into earlier channels after it migrated north and west. Emperor Shenzong ultimately ruled that the river should be left in its new course. A century earlier, in 1020, the Song engineer Li Chun proposed flooding the lower reaches to protect the central plains from the Khitai; the Chanyuan Treaty explicitly forbade any such action, so the proposal was overruled. In 1041, after the Song had spent five years and employed over 35,000 workers, 100,000 conscripts, and 220,000 tons of wood and bamboo in a single year trying to restore an earlier course, the project was abandoned as futile. The officials Pan Jixun wrote influential treatises arguing that merging river branches increased velocity and therefore the river's natural capacity to flush its own sediment; yet the very flood control works he advocated later produced a major flood at Sizhou, led to his dismissal from court, and ultimately, in 1680, submerged Sizhou and a nearby Ming imperial mausoleum beneath Hongze Lake.

• 7. Modern Management

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  In 1938, after closing the Huayuankou breach on the 15th of March 1947, the river reverted fully to its pre-war northern course the following day. Agricultural cultivation resumed quickly in the former southern flood zone, but thousands of people along the restored northern course, where dikes had not been repaired, were forced to flee. In areas under Communist control, local officials mobilized hundreds of thousands of people to fortify the dikes. After the Communist victory in 1949, the People's Republic announced in 1954 a General Plan to Fundamentally Control Yellow River Flood Disasters and Develop Yellow River Waterworks; large-scale construction began in 1957. From the 1970s to the 1990s, the river regularly ran dry before reaching the sea. In 1997 alone, the Yellow River failed to reach the sea for 226 consecutive days. Since 1999, unified water-flow regulation across the entire river has maintained continuous flow; on the 12th of August 2024, the Yellow River Water Conservancy Committee reported that the river had flowed to the sea without interruption for 25 consecutive years. Over those 25 years, the main channel supplied more than 543.6 billion cubic meters of water, and the number of bird species in the estuarine wetlands has risen to 373. Since 2003, China has also been building the South-North Water Transfer Project to move water from the Yangtze watershed northward to relieve the Yellow River basin, whose 120 million basin residents and over 420 million provincial dependents place enormous demands on a river that carries only 2 percent of China's total water runoff.

• 8. A Name Written in Silt

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  When the Yellow River was still clear enough to see through, early records simply called it "the river", using the Old Chinese word gai. Chronicles of observations at the Yumenkou gorge show that the water turned muddy sometime between 367 BC and 165 AD. The alternative name "murky river" appears in sources dated to 145 BC; "yellow river" first shows up in 429 AD. By the end of the Tang dynasty, the yellow name had completely replaced the muddy one, for reasons the historical record does not explain. Other languages and cultures gave the river other identities. In Mongolian it is called Šar mörön, meaning "yellow river", or Khatan gol, meaning "queen river". The Kul Tigin stele, an Old Turkic inscription, calls it the "green river". Its Tibetan name translates as "River of the Peacock". In the Shaanxi loess plateau, speakers of Jin language call it "river, my lord". A traditional belief held that the Yellow River descended from Heaven as a continuation of the Milky Way. The Chinese idiom for an event that will never happen, equivalent to the English "when pigs fly", is "when the Yellow River flows clear" - because those who depend on the river know that clarity is not in its nature. In 1414, the river's unusual clarity during the reign of the Yongle Emperor was recorded as a good omen, noted alongside the arrival of a giraffe from Africa, brought by a Bengal embassy aboard Zheng He's ships.