Knowledge about the Yellow River

Yellow river-the river with the largest sediment concentration in the world.

The basic information is 5464 kilometers long, the source is 4800 meters above sea level, the average flow is 1 774.5 cubic meters per second, and the drainage area is 752443 square kilometers. The source is in Qinghai Province and flows into Bohai Sea. The middle and lower reaches are divided into estuary and old Jin Meng. Origin: the northern foot of Bayan Kara Mountains in Qinghai Province.

Natural characteristics

The Yellow River, the second longest river in China, originated in Bayan Kara, Qinghai. Its main stream runs through nine provinces and regions, and flows through Qinghai, Sichuan, Gansu, Ningxia, Inner Mongolia, Shaanxi, Shanxi, Henan and Shandong, with a total length of 5,464 kilometers, a drainage area of 750,000 square kilometers, an annual runoff of 57.4 billion cubic meters and an average runoff depth of 79 meters. However, the water volume is not as large as that of the Pearl River, and there are 35 main tributaries along the way. The larger tributaries are in the upper reaches, with Huangshui River, Taohe River, Qingshui River, Fenhe River, Weihe River and Qinhe River in the middle reaches, and Yihe River and Luohe River in the lower reaches. There are no lakes on both sides of the river, and the lower reaches of the Yellow River are very small, and few rivers flow into the Yellow River. The estuary of the Yellow River is1500m wide, generally 500m, the narrower part is only 300m, and the water depth is generally 2.5m.. In some places, the depth is only 1.2 ~ 1.3 meters.

geographical environment

The mountainous and grassland plateaus from Heyuan to Guide belong to the Qinghai-Tibet Plateau. The peaks are all above 3000 meters above sea level; The upper valley is over 4200 meters above sea level. The terrain on both sides of the upper valley is gentle and the drainage is not smooth; Formed a large swamp and many lakes. Guide's reach from Jinmeng River is the Loess Plateau, with Xibe and Weihe valleys in Lvliang in the south, Ordos Plateau in the north and Lanzhou Valley in the west. The elevation of the Loess Plateau is generally 65,438+0,000 ~ 65,438+0,300 m, and the terrain is undulating, with steep slope and deep gully. The gully ground slope is 65,438+0.5 ~ 20 degrees, the gully area accounts for 40~50%, and the gully density is 3 ~ 5km/km2. Below Jin Meng, it enters the low-lying North China Plain, with an altitude of no more than 50 meters. After entering the downstream, the river channel is flat, and the average gradient is only 0. 12%. The water flow slows down and a lot of sediment is deposited, which is 4~5 meters above the ground. Due to the repeated diversions of the Yellow River, fan-shaped ancient riverbeds and ancient natural dikes are alluvial on the ground, becoming an inclined plain with alternating gentle hills and depressions, and the depressions are relatively open and flat.

River basin survey

The Yellow River reaches Hekou Town, Tuoketuo County, Inner Mongolia Autonomous Region, with a total length of 3,472 kilometers. The middle reaches are from Hekou Town to Taohuayu, Zhengzhou, Henan Province, with a river length of 1206 km. Below Taohuayu is the downstream, with a river length of 786 kilometers. There are many opinions on the division of the upper, middle and lower reaches of the Yellow River, and the division scheme of the Yellow River Water Resources Commission is adopted here. The Yellow River runs across China from east to west, with a length of 1.900 km from east to west and a width of1.654,38+0.000 km from north to south, with a total area of 752,443 square kilometers.

The Yellow River, like a lion with his head held high, crosses the mountains of Qinghai and Gansu provinces from the Qinghai-Tibet Plateau. Hetao Plain across Ningxia and Inner Mongolia; Pentium in the ravine between Shanxi and Shaanxi; Break through the "Longmen", turn around at the foot of Huashan Mountain in Xiyue, cross the North China Plain, and head for the coast of Bohai Sea. It flows through 9 provinces and regions, and gathers more than 40 main tributaries and 1000 streams and rivers, with a journey of 5,464 kilometers and a drainage area of more than 750,000 square kilometers, making it the second longest river in China. The average annual precipitation in the whole basin is about 400 mm, while the average annual runoff of the Yellow River is only 57.4 billion cubic meters, ranking eighth among Chinese rivers. There are more than 200 million mu of cultivated land in the basin, and the population is about 654.38+0 billion along the Yulu River downstream.

The average natural runoff of the whole Yellow River for many years is 58 billion cubic meters, the average annual runoff depth of the basin is 77 mm, the per capita water volume of the basin is 593 cubic meters, and the cultivated land is 324 cubic meters.

The middle reaches of the Yellow River flow through the Loess Plateau, and tributaries bring a lot of sediment, making the Yellow River the largest river with sediment concentration in the world. The annual maximum sediment discharge is 3965438+ 1 100 million tons (1933), and the maximum sediment concentration is 920kg/m3( 1977). The average sediment discharge of Sanmenxia Station for many years is about 65.438+0.6 billion tons, and the average sediment concentration is 35 kg/m3.

branch

The main tributaries of the Yellow River are Baihe, Heihe, Huangshui, Zuli, Qingshui, Dahei, Kuye, Wuding, Fenhe, Weihe, Luohe, Qinhe and Dawenhe.

Major lakes

There are Zhaling Lake, Eling Lake, Wuliangsuhai Lake and Dongping Lake.

Mainstream canyon

There are 30 canyons in the main stream of the Yellow River, 28 in the upper reaches and 2 in the middle reaches. The lower reaches flow through the North China Plain without canyons. The canyon section of the main stream is 1707 km long, accounting for 3 1.2% of the total length of the main stream.

Biological resources

Fish 12 1 species (subspecies) in the main stream of the Yellow River, and 98 species of pure freshwater fish in the main stream, accounting for 78.4% of the total. The main economic fish are naked spotted carp, flat-edged swallowtail, thick-lipped naked heavy-lipped fish, yellow river naked-lipped fish, yarrow, northern Tongyu, carp, crucian carp and so on. There are only 16 species of fish in the upper reaches of the Yellow River, and the composition is relatively simple. There are only Schizothorax fish, yarrow fish and loach in CYPRINIDAE and Misguridae. Fish in the middle and lower reaches are generally similar, mainly CYPRINIDAE. There are 7/kloc-0 species of fish in the middle reaches, and there are no typical plain fish such as silver carp, bighead carp, bream and bream. There are Schizothorax and Misgurnus anguillicaudatus in the upper reaches of the middle reaches, and 78 species of fish in the lower reaches, including a variety of fish crossing estuaries and brackish water. According to the survey data of tributaries of the Yellow River, according to the fish statistics of Taohe River in Gansu, Weihe River in Shaanxi and Jinghe River, there are 30 species in Weihe River, followed by Taohe River 1 1 species, and only 4 species in Jinghe River. Most of the tributaries in the middle and upper reaches are small fishes of CYPRINIDAE and Misgurnus, a few are Tasmanian fishes and catfish, and the economic fishes are carp, crucian carp, yarrow fish and catfish.

River division

There are different opinions about the boundary between the upper, middle and lower reaches of the Yellow River. The Yellow River Conservancy Commission divides Hekou Town and Taohuayu into upper, middle and lower reaches. Traditional middle school textbooks divide Hekou Town and Jin Meng into upper, middle and lower reaches. Scholar Yang thinks Qingtongxia and Harmony are more suitable. Scholar Xu advocated Jiayingguan in Wuzhi County, Jiaozuo City, Henan Province as the dividing line between the middle and lower reaches of the Yellow River. The following is the division plan of the Yellow River Water Conservancy Commission.

Upstream

The upper reaches of the Yellow River are above Hekou Town, Tuoketuo County, Inner Mongolia. The total length of the upper reaches is 3,472 kilometers, and the basin area is 386,000 square kilometers, accounting for 5 1.3% of the total Yellow River. The total upstream drop is 3496m, with an average gradient of10 ‰; There are 43 large tributaries (basin area 1000 square kilometers or more), and the runoff accounts for 54% of the whole river; The upper reaches of the Yellow River only account for 8% of the annual sediment discharge of the whole river, with more water and less sediment, which is the clear water source of the Yellow River. The upper reaches of the river are controlled by Qingshan Mountain, Xiqiao Mountain and Nanshan Mountain in Anima, Qinghai, with an S-shaped bend. According to the different characteristics of rivers, the upper reaches of the Yellow River can be divided into three parts: source section, canyon section and alluvial plain section.

The upper part of Qinghai Kariqu to Qinghai Guide Longyangxia is the Heyuan section. Heyuan section starts from Kariqu, passes through Xingsuhai, Zhaling Lake and Eling Lake to Maduo, bypasses Qingshan and Xiqingshan in Anima, and reaches Guide in Qinghai via Longyangxia. Most of the rivers in this section flow through the plateau of three or four kilometers, and the rivers are tortuous, with lakes, swamps and grass beaches on both sides. The water quality is clear, the water flow is stable and the water yield is large. There are Zhaling Lake and Eling Lake in the reach, both above 4260 meters above sea level, with storage capacity of 4.7 billion cubic meters and 654.38+0.08 billion cubic meters respectively, which are the largest plateau freshwater lakes in China. The Yellow River runs from Maduo, Qinghai Province to Maqu, Gansu Province, and flows through the ancient basin and low hills between Bayankala and Animaqing Mountain. Most river sections have wide valleys, and occasionally there are canyons. The Yellow River runs from Maqu, Gansu Province to Longyangxia, Guide, Qinghai Province, and flows through high mountains and canyons, with fast-flowing water and abundant hydraulic resources. Baihe and Heihe rivers, tributaries originating in Minshan, Sichuan, join the Yellow River in this section.

The section from Longyangxia in Qinghai to Qingtongxia in Ningxia is a canyon section. This section of the river flows through mountainous hills. Due to different rock properties, river valleys and wide valleys appear alternately: river valleys are formed in hard gneiss, granite and Nanshan metamorphic rocks, while wide valleys are formed in loose sand shale and red rock series. There are 20 canyons in this section, including Longyang Gorge, Jishi Gorge, Liujiaxia Gorge, Bapan Gorge and Qingtongxia. There are cliffs on both sides of the canyon, with narrow riverbed, steep river slope and rapid water flow. From Guide to Lanzhou, this section is one of the concentrated reaches of the three major tributaries of the Yellow River, and the inflow of important tributaries such as Taohe River and Huangshui River has greatly increased the water volume of the Yellow River. The reach from Longyangxia to Xiaheyan River in Ningxia is a "mine-rich" area of the Yellow River and one of the important hydropower bases in China.

Qingtongxia in Ningxia to Hekou Town in Tuoketuo County, Inner Mongolia is an alluvial plain. After leaving Qingtongxia, the Yellow River flows northeast along the northwest boundary of Ordos Plateau, and then reaches Hekou Town eastward. Most of the areas along the river are deserts and desert grasslands, and there is basically no tributary injection. The river bed of the main stream is gentle and the water flow is slow. On both sides are large alluvial plains, namely the famous Yinchuan Plain and Hetao Plain. There are floods and ice disasters in the plain along the Yangtze River to varying degrees. Hetao Plain starts from Xiaheyan in Ningxia in the west and reaches Hekou Town in Inner Mongolia in the east, with a length of 900 kilometers and a width of 30-50 kilometers. It is a famous irrigation area for diverting water from the Yellow River with a long irrigation history. Since ancient times, there has been a saying that "the Yellow River is full of disasters and there is only one set of wealth".

middle reaches

The reach of the Yellow River between Hekou Town, Tuoketuo County, Inner Mongolia and Taohuayu, Zhengzhou, Henan Province is the middle reaches of the Yellow River, with a total length of 1.206 km and a drainage area of 344,000 square kilometers, accounting for 45.7% of the total drainage area. The total drop in the middle reaches is 890 meters, with an average gradient of 0.74 ‰; This river has 30 major tributaries; The increased water volume accounts for 42.5% of the Yellow River water volume, and the increased sediment volume accounts for 92% of the whole Yellow River sediment volume, which is the main source of the Yellow River sediment.

Hekou Town to Yumenkou is the longest continuous canyon on the main stream of the Yellow River-Shanxi Canyon. Most of the tributaries of this reach flow through the loess hilly and gully region, which is the main source of coarse sediment in the Yellow River. Among the 65.438+0.6 billion tons of sediment transport in the whole river for many years, 900 million tons come from this interval. This reach is the second largest hydropower base of the Yellow River with large gradient and abundant hydraulic resources. There is a famous Hukou Waterfall in the lower part of the canyon, with a deep trough width of only 30~50 meters and a low water level drop of about 18 meters, which is magnificent.

From Yumenkou to Sanmenxia, the Yellow River flows through the Wei Fen Plain, the valley widens and the water flows slowly. The two banks of this river are Weibei and Jinnan loess tablelands, which are important agricultural areas in Shaanxi and Shanxi provinces. This reach has accepted Fenhe River, Luohe River, Jinghe River, Weihe River, Luo Yi River, Qinhe River and other important tributaries, and is one of the main sources of sediment in the lower reaches of the Yellow River, with an average annual output of 550 million tons. The reach is located in the channel from Yumenkou to Tongguan (that is, the small north main stream of the Yellow River) 132.5km, with drastic changes in erosion and deposition, and the channel is very unstable from side to side. Constrained by the mountains near Tongguan, the valley suddenly narrows, forming a natural bayonet with a width of only 1000 meters. The level of Tongguan river bed is closely related to the changes of erosion and deposition in the Xiaobei main stream of the Yellow River and the lower reaches of the Weihe River, so the hydrological term "Tongguan elevation" is used.

Sanmenxia to Taohuayu section is divided into two parts from Xiaolangdi: above Xiaolangdi, the river is between Zhongtiao Mountain and hill, which is the last canyon on the main stream of the Yellow River; The valley below Xiaolangdi gradually widens, which is the transition section of the Yellow River from mountainous area to plain.

lower reaches

The Yellow River below Taohuayu in Zhengzhou, Henan Province is the lower reaches of the Yellow River, with a total length of 786 kilometers and a drainage area of only 23,000 square kilometers, accounting for 3% of the total drainage area. The total downstream drop is 93.6m, with an average gradient of 0.1.2 ‰; The increased water volume in the interval accounts for 3.5% of the water volume of the Yellow River. Due to the large amount of sediment in the Yellow River, the long-term sedimentation in the lower reaches has formed a world-famous "hanging river on the ground", and the Yellow River has become a watershed between the Haihe River Basin and the Huaihe River Basin. Except for the Dawen River flowing from Dongping Lake, there are no big tributaries in this section.

Except for the low hills between Dongping Lake on the south bank and Jinan, the lower reaches depend on dikes, with a total length of 1.400 km. Historically, the lower reaches of the Yangtze River often burst, which brought heavy disasters to the Chinese nation. Because the lower reaches of the Yellow River flow from southwest to northeast, the north of the Yellow River freezes first in winter, forming ice flood. Ice dams are easily blocked by the overflow of ice, which leads to the overflow of dikes and poses a serious threat.

Below the downstream Lijin is the Yellow River estuary. Due to sediment deposition, the mouth of the Yellow River keeps extending and swinging. At present, the Yellow River estuary is located at the intersection of Bohai Bay and Laizhou Bay, which is a new channel formed by the siltation of Qingshuigou after the artificial diversion of 1976. In recent 40 years, the average sediment transported by the Yellow River to the estuary area is about 654.38+100 million tons/year, with an average annual net land of 25 to 30 square kilometers.

Legends about the Yellow River

1- Legend has it that a long time ago, the ancient Yellow River was a wild horse that was difficult to tame. It runs as it pleases, like a grinning monster, growling day and night, devouring thousands of fertile fields. Bite Chung Shan Man, the Hui people on both sides of the Yellow River can only live a slash-and-burn life at the top of the mountain and at the bottom of the ditch. At that time, Ningxia was not a plain bordered by Ma Pingchuan, but green mountains and valleys. There is no flat field, and no field can be irrigated with Yellow River water. Legend has it that there are several families living in Niushou Mountain who return to the Han family. They carry water at the foot of the mountain and farm at the top of the mountain for generations. All ages are busy, but they don't have enough to eat and don't wear warm clothes. For a long time, no one could stand this torture. One year, a 70-year-old Hui Hui man named Del opened a melon garden on the mountain and planted some cucumbers. He gets up early every day and goes to the Yellow River to fetch water and water cucumbers. His shoulders are swollen and his feet are skinned. He carefully cultivated cucumbers, and the yellow ones looked tender and sweet. On this day, the old man was tired and fell asleep at the gate of the vegetable garden. As soon as he fell asleep, he dreamed that there was a white cloud floating in the sky. Gradually, Baiyun became an imam with a white beard, shook his silver beard and said to the old man, "There are two strong winds today, so you should pay attention. There is a yellow wind at noon, which can make cucumbers wither; There is a black wind in the afternoon, which can make cucumber stems fall off. No matter how windy it is, don't pick cucumbers. When the old man woke up, he saw that the white-bearded imam had disappeared, but he saw that the yellow wind in the north was overwhelming and suddenly blew to Niushou Mountain. The old man looked at the cucumbers carefully, and sure enough, they faded one by one. He was very sad. A year's efforts were in vain, but the thought of the white-bearded imam stopped him. In the afternoon, a black wind blew, shaking the mountains and dropping leaves layer by layer. When the old man saw that the cucumber was about to fall to the ground, he was very angry. He picked a cucumber and threw it into the Yellow River. The Yellow River immediately broke a line. As if he had been cut by a fairy with a knife, he clearly saw the bottom of the river. When the old man Gerd swooped down, the river suddenly joined again. The old man was tired and hungry, sitting on the river bank, blinking, and the golden flower danced wildly, knowing nothing. At this time, the old man in Del heard the white-bearded imam say, "This cucumber is the key to conquering the Yellow River. You can cut off the Yellow River and make it listen to people. But now the Yellow River is called Yellow Wind and Black Wind, and these two Iberians are suffering. Don't be impatient, be patient and work harder. Next year, you plant another cucumber garden. When the cucumber is ripe, you pick the biggest one and throw it into the Yellow River. At that time, you walked into the cave at the bottom of the river, took off the gems, took away the seeds of the grain, and had a sword to cut the dragon and the devil and tame the Yellow River. Where you point, the Yellow River water will flow. The next year, the hardworking old man Gerd planted another cucumber garden. He is not afraid of the long journey, and he does not hesitate to sweat like rain, carrying water from the Yellow River to water melons. Everything comes to him who waits. Finally, a three-foot cucumber grows in the garden, which looks like a key. The old man happily slept in the melon garden for a day and a night until the melon was ripe. On this day, the weather was fine, without a cloud. Old man Wilder picked a three-foot cucumber, read "Taismi" and threw it into the Yellow River. At this time, I only heard the roar of the Yellow River, and I opened a long crack. All the stones at the bottom of the river are clearly visible. When the old man went down to the bottom of the river, he saw a hole near the river bank, where pearls and agates were everywhere. The old man took some and just left, he heard the storm whistling. At that time, the waves on the river rolled and the waves became higher and higher. The old man Gerd picked up his sword and cut dozens of swords on the left and right sides of the black whirlwind and the yellow whirlwind. After a while, black wind and yellow wind blew in the sky. At this time, the faults of the Yellow River gradually tightened. Del's old man remembered the command of the white-bearded imam, and this sword could conquer the Yellow River. He knew very well, and he thought, I want the Yellow River to fill ditches and level mountains. Holding two swords, the old man plunged into the Yellow River, and the water in the Yellow River stopped flowing at once, as if a Great Wall had been blocked in front, but it was still rising steadily, which was really scary from a distance. Three days later, from Liupanshan in the south to Helan Mountain in the west, there was water everywhere, leaving only a few mountain tips. Only then, the old man, Gerd, drew his sword and told the Yellow River to flow forward. Since then, Ningxia, a deep mountain valley, has become Ma Pingchuan, and the Hui people living on both sides of the Yellow River have dug ditches for farmland with hard-working hands and lived a happy life.

2- Myth and legend: Dayu had three treasures when he governed the Yellow River. One is the river map; The second is a mountain axe; The third is to avoid water swords. Legend has it that the river map was given to Dayu by Hebo, the water god of the Yellow River. In ancient times, there was a man named Feng Yi in Huayin General Township. He feels uncomfortable farming, but he is bent on becoming an immortal. He heard that people can become immortals after drinking the juice of daffodils for one hundred days. So I looked everywhere for daffodils. Before Dayu harnessed water, the Yellow River flowed to the Central Plains. There is no fixed channel, it flows everywhere and is often flooded. There are seven strands and eight roads on the ground, and the branches in the ditch are all yellow river water. Feng Yi ran around looking for daffodils, often crossing, crossing and dealing with the Yellow River. Ninety-nine days passed in the blink of an eye, and then I found a daffodil and sucked the juice of the daffodil for a day, so I could become an immortal. Feng Yi was so proud that he crossed the Yellow River and went to a small village to look for daffodils. The water here is not deep. Feng Yi waded across the river and reached the middle of it. Suddenly, the river rose. He panicked, slipped, fell into the Yellow River and was drowned alive. After Feng Yi's death, she was full of grievances and resentments and hated the Yellow River, so she went to the Jade Emperor to sue the Yellow River. The Jade Emperor was also annoyed when he heard that the Yellow River was undisciplined and wandering around, endangering the people. Seeing that Feng Yi had been sucking the juice of daffodils for ninety-nine days, it was time to become an immortal. He asked Feng Yi if he would be the water god of the Yellow River and govern it. Feng Yi was overjoyed. Full of promises. Now I can realize my dream of becoming an immortal, and secondly I can avenge my drowning. Feng Yi became the water god of the Yellow River and was called Hebo. He has never been involved in water control, and suddenly assumed the responsibility of managing the Yellow River, helpless and worried. What should we do? I have no magic weapon, so I have to ask the Jade Emperor for advice. The Jade Emperor told him that to manage the Yellow River well, we must first find out the water conditions of the Yellow River and draw a river map. Based on the river map of the Yellow River, it will be much easier to control the Yellow River. Hebo, according to the instructions of the Jade Emperor, was bent on drawing a river map. He went to his hometown first and wanted to ask the villagers for help. Everyone in the village hated his idleness and his work, and no one answered him. He found the old man in the village and expressed his great ambition to govern the Yellow River. When the old man saw that he was now a fairy and wanted to do something good for the people, he promised to help him. From then on, Hebo and later old people came and went in the rain, wading through mountains and rivers to see the Yellow River water regime. After running for several years, the old man was tired. After the old man only went back, the rest of Hebo continued to check the water situation along the Yellow River. When we parted, the old man repeatedly told Hebo that the director should go all the way and not give up halfway. After drawing the map, he began to manage the Yellow River, and there was not enough manpower. He persuaded the villagers to help. It is a hard job to check the water regime and draw a river map. By the time Hebo finished drawing the river map, he was old and weak. Hebo looked at the river map, where the Yellow River is deep and shallow; Where it is easy to explode, it is easy to explode; Where to dig and where to block; Where the water can be cut off and where the flood can be discharged are clearly drawn. I can only sigh that I have no strength to manage the Yellow River according to the map, which is very sad. Hebo thought that one day someone would come to harness the Yellow River. It will be worthwhile to give him the river map then. Hebo spent his old age under the Yellow River and never appeared again. Unexpectedly, the Yellow River overflowed again and again. People know that the Jade Emperor sent Hebo to control water, but they didn't see him. They all scold Hebo for not doing his duty, regardless of whether people live or die. The old man hasn't seen Hebo for several years after waiting for him every day in his hospital bed. He is uneasy about managing the Yellow River and wants to find Hebo. His son's name is Yi, and he shot every shot. No matter what the old man says, Yi won't let him go to Hebo. Later, the old man did not listen to his son's dissuasion. As a result, he met a breach in the Yellow River, was washed away and drowned, and even the body was not found. Hou Yi hated Hebo's guts and gnashed his teeth, saying that Hebo would be shot sooner or later. Later, Dayu came out to control water, and Hebo decided to give him the map of the Yellow River. On this day, Hebo heard that Dayu came to the Yellow River with an axe and a sword to avoid water, so he came out from the bottom with a river map to look for Dayu. Hebo and Dayu have never met before, and neither of them knows each other. Hebo walked for a long time and was so tired that he wanted to have a rest. He saw a young man crossing the river. This young man is a hero. He must be Dayu. Hebo shouted and asked, "Hello, who are you?" The young man on the other side is not Dayu, but Hou Yi. He looked up, and on the other side of the river, a saint-like old man was asking loudly, "Who are you?" Hebo said loudly, "I'm Hebo. Are you Dayu? " When Hou Yi heard that it was Hebo, he immediately rushed to his heart and sneered, "I am Dayu." With a bow and arrow, regardless of indiscriminate, an arrow "sou" hit Herb's left eye. Hebo pulled an arrow on his eye, and he was sweating with pain. He cursed in his heart: "Damn prison, how unreasonable!" The more he thought about it, the more angry he became, and he tore up the water map. Just then, there was a loud shout: "Hebo! Don't tear the picture. " Hebo barely looked at it with his right eye. On the other side, a man in a hat stopped Hou Yi. This man is Dayu. He knew that Hebo had painted a picture of the Yellow River and was going to ask Hebo for advice. Hou Yi pushed Dayu away and tried to draw a bow and arrow. Dayu grabbed him desperately and told Hebo about the hardships of painting. Hou Yi regretted his recklessness and shot Hebo in the left eye. Hou Yi and Dayu crossed the river together. Hou Yi admitted his mistake to Hebo. Hebo knew that Hou Yi was the old man's son and didn't blame him. Dayu said to Hebo, "I'm Dayu, and I've come to ask you for advice on how to manage the Yellow River." Hebo said, "My heart and blood and the way to manage the river are all on this picture. I will give them to you now." Look at Dayu's exhibition map, which is dense and dense, and draws the water situation of the Yellow River clearly. Dayu was extremely happy. He wants to thank Hebo. Looking up, Hebo jumped into the Yellow River and disappeared. Dayu got the hydrological map of the Yellow River and kept it around the clock. According to the instructions on the map, he finally managed to control the Yellow River.