Central idea:
This paper introduces the changing process, reasons and treatment scheme of the Yellow River, telling people to protect nature and environment, or they will be punished by nature.
The general idea of this paragraph is:
The full text can be divided into four parts.
The first part (1 paragraph): The sufferings brought by the Yellow River to people on both sides of the strait.
The second part (the second and third paragraphs): Why the Yellow River is the cradle of the Chinese nation.
The third part (paragraphs 4-6): The reasons for the changes of the Yellow River.
The fourth part (paragraph 7): The scheme of harnessing the Yellow River designed by scientists.
Writing order:
The text first writes that the Yellow River has brought suffering to people on both sides of the strait, and it is a troubled river. But also the cradle of the Chinese nation; Then, the reasons for the change of the Yellow River are analyzed from the current situation of sediment concentration in the Yellow River. Finally, write a plan designed by scientists to control the Yellow River. There is a strong sense of superiority and inferiority between the lines, telling people to protect the environment.
Question 2: How has the Yellow River changed? There are two reasons for the change of the Yellow River: First, natural reasons, cooling climate, concentrated rainstorm and loose loess. These two factors interact, causing a lot of soil erosion, and a large amount of sediment enters the Yellow River, blocking the river. The second is social reasons, that is, human destruction of nature.
Question 3: How does the Yellow River change? What are the two reasons for the change of the Yellow River?
One is the climate change in the Loess Plateau and the loose structure of the loess itself. The other is the destruction of nature by human beings.
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Question 4: What has happened to the Yellow River? Tell me what happened to the Yellow River. The Yellow River, which was originally comparable to the Jianghuai Valley, has changed due to various reasons, such as lack of vegetation, increasing population, and human crazy land reclamation and tree cutting. In two thousand years, it broke 1500 times and changed lanes 26 times, tormenting people on both sides of the strait.
This article reminds me of a news I read in the newspaper a few years ago about serious soil erosion in the Loess Plateau. I sincerely feel the tragic consequences of unlimited reclamation and destruction of vegetation. Now, the Loess Plateau is bare; But who would have thought that green was once the main color here? When the wind blows, the yellow sand on the Loess Plateau fills the earth. After several twists and turns, the environment of this plateau can be said to be from heaven to hell.
The change of the Yellow River has sounded the alarm for us. Because of people's evil deeds, the Yellow River began to become cruel. Data show that the Yellow River was originally the birthplace of human beings, and our ancestors chose to live here because of its warm climate and beautiful scenery, which is very suitable for human habitation. But what about now? All this has disappeared. From ancient times to the present, it is presented to people that the Yellow River breaks its banks every year, hurting innocent people. As a China person, how can you be indifferent to the changes of the mother river?
This cruel reality reflects the serious consequences of people destroying forests. Here, I want to appeal to the world: "If we don't take action to protect the forest. Not only the Yellow River will be destroyed, but the whole beautiful world will become desolate! "
Question 5: The main content of How the Yellow River Changed is less than the central idea and general idea of the paragraph in How the Yellow River Changed.
Central idea:
This paper introduces the changing process, reasons and treatment scheme of the Yellow River, telling people to protect nature and environment, or they will be punished by nature.
The general idea of this paragraph is:
The full text can be divided into four parts.
The first part (1 paragraph): The sufferings brought by the Yellow River to people on both sides of the strait.
The second part (the second and third paragraphs): Why the Yellow River is the cradle of the Chinese nation.
The third part (paragraphs 4-6): The reasons for the changes of the Yellow River.
The fourth part (paragraph 7): The scheme of harnessing the Yellow River designed by scientists.
Writing order:
The text first writes that the Yellow River has brought suffering to people on both sides of the strait, and it is a troubled river. But also the cradle of the Chinese nation; Then, the reasons for the change of the Yellow River are analyzed from the current situation of sediment concentration in the Yellow River. Finally, write a plan designed by scientists to control the Yellow River. There is a strong sense of superiority and inferiority between the lines, telling people to protect the environment.
Question 6: How did the Yellow River change? How did the Yellow River change? The situation of water pollution in the Yellow River is not optimistic. As the mother river of the Chinese nation, the Yellow River is responsible for urban water supply in eight coastal provinces, as well as Tianjin, Hebei and other cities. It is an important water resource in northwest and north China. With the development of economy along the Yellow River and the increase of water quantity in China, the amount of wastewater discharged into the Yellow River is also increasing year by year. Although the standard discharge in 2000 limited the wastewater discharge of some enterprises, it was not fundamentally curbed. Industrial pollution, urban life pollution and agricultural non-point source pollution are increasing continuously, and a large amount of wastewater is discharged, which makes the Yellow River overwhelmed. According to the statistics of water resources bulletins of provinces and regions in the basin and 1998 Yellow River water resources bulletin, the wastewater discharge in the Yellow River basin has reached 4.204 billion tons, which is twice as much as 21700,000 tons in the early 1980s. Therefore, the shortage of water resources and the decrease of natural runoff in the Yellow River basin have led to an increase in the sewage-runoff ratio of the Yellow River and an intensification of water pollution. According to the preliminary results of the recent investigation on the hazards of water pollution in the Yellow River Basin conducted by the Yellow River Basin Water Resources Protection Bureau, the economic losses of industry, agriculture, urban water supply, water conservancy facilities, municipal additional investment, aquaculture and human health caused by water pollution in the area below Longmen in the main stream of the Yellow River are as high as 654.38+000 billion yuan/year. According to the Yellow River Basin Water Environment Monitoring Center, according to the Environmental Quality Standard for Surface Water (GB3838-88), the perennial water quality monitoring and evaluation results of conventional, provincial boundaries and water supply sources in the Yellow River Basin show that the water quality of the main stream of the Yellow River has generally improved and gradually improved since 1997, and the water quality of some sections has deteriorated. Compared with Class III water, there is still a big gap. Judging from the water quality evaluation results in 2000, nearly half of the main streams are less than Grade III water. The water quality of the main stream is inferior to three categories, including Wufosi reach, Shizuishan reach, Toudaoguai reach, Wudaqiao reach and Longmen reach, Tongguan reach and Sanmenxia reach in the middle reaches. Judging from the evaluation results of water supply sources, only four of the water supply sources in the main stream of the Yellow River 1 1 meet the Class III water standard, and the other seven are Shizuishan, Zhaojun Tomb, Painter Camp, Laikou, Toudaoguai, Sanmenxia and Huayuankou. What's more, the water quality of some water supply sources only meets the requirements of agricultural water and general landscape water. Long-term exceeding Class III water quality category will not only increase the cost of water treatment, but also affect people's health. The Yellow River Basin Water Resources Protection Plan, which is being formulated by the Yellow River Basin Water Resources Protection Bureau, divides the key river sections into water quality target categories according to their functions. According to the planning results, the existing water quality categories far exceed the planning target categories. Among the 3 1 key river sections participating in the evaluation, the water quality category of 12 river section exceeds the planning water quality category. Of the main tributaries of 19, 16 reaches the planned water quality category, and the rest 19 reaches the planned water quality category. Judging from the current water quality categories, all river sections have no capacity to accept pollution, which undoubtedly increases the difficulty of implementing total amount control in the future. From this point of view, the water quality of the Yellow River is not optimistic, and the water pollution situation is still very serious. There is a long way to go to control water pollution in the Yellow River. Water pollution in the Yellow River causes tens of billions of yuan in economic losses every year, and the annual economic losses caused by water pollution in the Yellow River are about11500 million yuan to1560 million yuan. This is the conclusion reached after the Yellow River Basin Water Resources Protection Bureau organized an expert group to quantitatively analyze the water pollution of the Yellow River. The Yellow River is an important water source in northern China. Since the founding of New China, the economic benefits of irrigation, industry and urban water supply brought by the Yellow River have reached 600 billion yuan. The sustainable utilization of water resources in the Yellow River is an important guarantee for the social and economic development of the Yellow River basin and related areas. However, in recent ten years, the pollution of the Yellow River has intensified. At present, the total amount of wastewater discharged by the Yellow River has reached 4.2 billion cubic meters every year, twice that of the 1980s. The pollutants discharged into the Yellow River have exceeded the carrying capacity of the Yellow River water environment. According to experts, industrial pollution is the main cause of water pollution in the Yellow River, accounting for 73% of the total wastewater discharge, but water pollution in turn causes huge losses to the industrial economy. According to estimates, the annual loss caused by water pollution in the Yellow River basin is about 2.3-3.2 billion yuan, which leads to the increase of industrial water cost and the decline of product quality. Agriculture is a big water user on the Yellow River, accounting for 90% of the total water consumption of the Yellow River, and the annual loss caused by water pollution in the Yellow River to agriculture is as high as 3.3 billion yuan. Worrying ... >>
Question 7: How does the Yellow River change and the relationship between the two major reasons for the change of the Yellow River:
The first is the climate change in the Loess Plateau and the loose structure of the loess itself.
The second is the destruction of nature by human beings.
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Question 8: How has the Yellow River changed? What are the serious consequences? Excessive felling of virgin forests leads to land desertification and soil erosion, sediment deposition in the Yellow River, and river bed elevation (such as Tianshanghe River in Kaifeng), resulting in serious water pollution and floods.
Question 9: What has happened to the Yellow River? Cry when you see the coffin. If you can't reach the Yellow River, you can't wash the sand in Wan Li.
One year, a 70-year-old man named Gerd 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 through the valve, making the mountain crumble and the leaves fall 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 and was dizzy.
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 your jewels, took away the seeds of grains, and had a sword to cut dragons and demons and tame the Yellow River. Wherever it is referred to, 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. Once, the waves rolled on the river, and each wave was higher than the other. 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 in the deep mountain valley has become Ma Pingchuan. The Hui people living on both sides of the Yellow River, relying on their hard-working hands, cultivated land and lived a happy life.
Myths and legends:
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, so Feng Yi waded across the river and reached the middle of the river. Suddenly ... >>
Question 10: How does the Yellow River change? This paper mainly introduces the process, causes and control scheme of the Yellow River change, telling people to protect nature and environment, or they will be punished by nature.