Why did the Yellow River break its flow and why did the Yellow River break its flow

Analysis of the causes of the Yellow River disconnection: The reasons for the formation of the Yellow River disconnection can be summarized into two aspects: first, natural factors; The second is human influence, and the specific analysis has the following points:

1 Water resources are scarce and unevenly distributed in time and space.

2 Precipitation is on the low side.

3 The water used for the diversion of yellow industry and agriculture along the Yellow River has increased rapidly.

4. The development and utilization of water resources in the Yellow River is seriously wasted.

5. The reservoir regulation capacity is low, and the management and scheduling are not uniform.

From the above reasons for the interruption of the flow of the Yellow River, it can be seen that in order to solve the problem of the interruption of the flow of the Yellow River, the focus is to solve the contradiction of less water and more water in the dry season, and there are four principles: first, increase the amount of water flow; the second is to reduce water consumption; the third is to adjust the time of water use; Fourth, strengthen the protection of water quality.

Natural causes: Yellow River Basin.

The seasonal distribution of precipitation is uneven, with less precipitation in winter and spring, and less water entering the river. The lower reaches of the Yellow River are above-ground rivers with no tributaries and almost no groundwater replenishment. The north is dry and windy, and the evaporation is large. Human causes: The urban and rural areas along the upper and middle reaches take more water, so that the amount of water flowing into the downstream is very small.

The main natural causes are:1Most of the Yellow River Basin has an arid and semi-arid continental climate, with uneven distribution of annual precipitation, with heavy rainfall in summer and scarce precipitation in winter.

As a result, the annual runoff of the Yellow River varies greatly, and the phenomenon of flow interruption often occurs.

2.The Yellow River has a large sediment content and silt accumulation, forming an above-ground river downstream, destroying the river water and diving.

The complementary mechanism makes the Yellow River not replenished by diving on both sides of the river, but has been replenished by diving.

3.Global warming this year.

As a result, precipitation in the already arid Yellow River basin is even more scarce, and the Yellow River's water supply is insufficient.

The main human reasons are:1Long-term deforestation has seriously reduced the vegetation cover in the Yellow River Basin, and the water storage and retention capacity of the land has decreased.

2.With the rapid development of the city, the water used for domestic and industrial use in the city has increased dramatically, coupled with the waste of water, resulting in a serious reduction in the water resources of the Yellow River.

3.Agricultural irrigation methods in the Yellow River Basin have not been improved, with large water consumption and low water resource utilization.

4.Fossil fuel.

The greenhouse effect is exacerbated by its heavy use.

Causing the climate to continue to warm.

<> "After the Yellow River began to break in 1972, the Bird Rush rolled in the next 26 years, and the downstream flow was cut off for a total of 21 years. From 1991 to 1998, the flow was interrupted for many years. In 1997, the Yellow River was cut off nine times for a total of 226 days, with a section of about 700 kilometers, and for the first time, the flow of the Yellow River was cut off during the flood season.

The interruption of the Yellow River is the result of a combination of natural and man-made factors. An important reason for the interruption of the Yellow River is the scarcity of water resources in the Yellow River basin itself, which has received less rainfall in recent years.

The second reason is that the development of production in the Yellow River Basin has led to an increase in the amount of water diverted. In addition, the existing reservoir regulation capacity has been reduced, water resources have not been managed in a unified manner, and in dry years or seasons, the rivers compete for water to divert water, making the water supply of the Yellow River very tight. Another reason is that there is no awareness of water conservation, which leads to a huge waste of industrial and agricultural water in the basin.

After the Yellow River enters the lower plains, the water flow is slow, and a large amount of sediment from the middle reaches is silted, and the riverbed continues to rise, and finally rises above the ground on both sides to form an "above-ground river".

For a long time, people have used the method of building embankments in Ninsan to contain flooding, resulting in an increasing difference in elevation between the riverbed and the ground on both sides. Historically, the lower reaches of the Yellow River have breached and flooded many times, bringing profound disasters to the people of the North China Plain. The areas on both sides of the strait are faced with the threat of flooding every flood season, and the failure of a bridge will bring immeasurable harm.

In addition, the "above-ground river" of the Yellow River causes no tributaries to flow in, so that the water volume of the Yellow River decreases as it goes downstream, and then the flow of the Yellow River is cut off. The amount and difficulty of building embankments for flood control are increasing year by year, and the input cost is also increasing year by year.

The natural interruption of the Yellow River began in 1972, mainly in the downstream Shandong section, and in the 25 years from 1972 to 1996, there were 19 years of dry interruption, with an average of three times in four years.

After 1987, there was a continuous flow interruption almost every year, and the interruption time was continuously advanced, the scope of the interruption continued to expand, and the frequency and duration of the interruption continued to increase.

In 1995, the Lijin Hydrological Station, located in the estuary section, lasted for 122 days, and the length of the broken river extended to the vicinity of Chenqiao Village below Kaifeng City, Henan Province, with a length of 683 km, accounting for more than 80% of the length of the river in the lower reaches of the Yellow River (below Huayuankou).

In 1996, the Luokou Hydrological Station, located on the outskirts of Jinan, began to run off on February 14. The Lijin Hydrological Station was cut off seven times that year, lasting 136 days. In 1997, the interruption lasted for 226 days, which was the longest interruption.

Analysis of the reasons for the interruption of the Yellow River:

1 Water resources are scarce and unevenly distributed in time and space.

2 Precipitation is on the low side.

3 The water used for the diversion of yellow industry and agriculture along the Yellow River has increased rapidly.

4. The development and utilization of water resources in the Yellow River is seriously wasted.

5. The reservoir regulation capacity is low, and the management and scheduling are not uniform.