With the theme of the Mother River, I thought of our great Mother River, the Yellow River. The Yellow River is the cradle of the Chinese nation, carrying the Chinese civilization for 5,000 years, the birthplace of the Chinese civilization, known as the mother river of the Chinese nation, one of the symbols of the Chinese nation, and one of the most important rivers in the mainland. Since ancient times, the Yellow River has been widely known as "China's Sadness" and "China's Troublesome River". Yes, the Yellow River has not only brought countless beauty, but also made countless people feel extremely sad and distressed.
1. The problem of flooding in the Yellow River
The flooding of the Yellow River has always been a big problem, especially in the summer and autumn of each year, once it encounters continuous heavy rains, the Yellow River is likely to overflow, and once it floods, it will bring irreparable disasters to the residents of the Yellow River Basin.
Therefore, the flooding of the Yellow River has always been a thorn in the hearts of the people, and it has always been a problem of great concern to the state. In order to solve the problem of flooding in the Yellow River, the mainland has built many reservoirs in many provinces in the upper reaches of the Yellow River, such as the Yanglang Reservoir in Gansu Province, the Longyangxia Reservoir in Ningxia, and the first bay of the Yellow River in Jiuqu in Qinghai. These reservoirs can carry water downstream when needed downstream, and can also block the Yellow River when it floods, reducing the extent of flooding. In addition, there are a number of water conservancy projects that play a very important role in controlling the water level of the Yellow River and reducing the pressure of flooding downstream.
Second, the silt problem of the Yellow River
In addition to flooding, there is another big problem in the Yellow River, and that is the problem of silt. Due to the long-term siltation of the Yellow River, the riverbed of the Yellow River has gradually risen, and in the event of large-scale flooding, it is likely to bring irreparable disasters to the people and cities downstream, and even cause the Yellow River to be diverted naturally.
Therefore, many people believe that the Yellow River should be desilted, and only by cleaning up the sediment accumulated on the riverbed can the Yellow River problem be effectively solved. In order to clean up the sediment accumulated on the riverbed, the mainland has done a lot of work since ancient times, and every dynasty has had a dredging action, and the manpower and financial resources invested are also very huge, but the siltation has not decreased, but has become more and more.
Why is it so difficult to clean up the silt in the Yellow River? In fact, it is not easy to clean up the sediment accumulated in the riverbed, and there are many problems involved.
First of all, we should realize that silt is not a problem of the Yellow River, but of soil erosion as a whole. Only by solving the problem of soil erosion at the source can we effectively reduce the generation of silt, which is the fundamental policy for controlling the Yellow River.
Secondly, the formation of silt is a long process, and it is impossible to expect that the problem can be solved in a short period of time. Even if part of the sludge is cleaned up, the sludge will continue to come back, which is not a good way to treat the symptoms.
Finally, if the sand is dredged at will, it will also bring other problems to the Yellow River, such as the erosion of the river and the destruction of the ecological environment, which is not advisable. Therefore, when we carry out dredging work, we must be scientific and reasonable, and we must not be in a hurry.
Third, how to carry out the dredging work scientifically
Since sand dredging is not a good method, how can we carry out the dredging work scientifically?
First of all, we should realize that the dredging work is not achieved overnight, but requires long-term perseverance and effort. We should solve the problem from the source, realize that soil erosion is the root cause of silt, and only by increasing the intensity of ecological environmental protection can we effectively reduce the generation of silt.
Secondly, we can use some other methods, such as ecological restoration of the river, which can effectively reduce the erosion of the river, and can also intercept and divert the sediment through the water conservancy project, so that a part of the sediment can be deposited in the reservoir and reduce the silt pressure downstream.
Finally, when it is really necessary to carry out dredging, you can also use some scientific means, such as using a cutter suction ship to carry out dredging work, or you can use the scouring force of water to carry out dredging by opening the gate and releasing water, which can reduce the damage to the environment and can also achieve a good dredging effect.