Pollution of the Yellow River Interruption of the flow shorter

The increasingly serious water pollution of the Yellow River has seriously damaged the Yellow River ecosystem, resulting in the endangerment of aquatic life in the river. In the fifties of the last century, the beach of Yantan in Lanzhou City was full of red willows and reeds, and more than a dozen kinds of water birds such as bar-headed geese and plateau partridges inhabited, and now there is no trace of these bird species. In the early sixties of the last century, the number of fish growing in the Gansu section of the Yellow River was greatly reduced, and some of them have become extinct.

Even the blue and white stone white melon, a specialty of Lanzhou that Lanzhou people are proud of, has deteriorated in recent years due to watering the polluted Yellow River water.

Man-made causes are higher than natural causes.

Such as: indiscriminate felling.

Since 1972, the Yellow River has often been cut off. There are many reasons for the interruption of the flow, which can be summarized as follows:

1.Global warming - With the intensification of global warming in recent years, on the one hand, the evaporation of rivers has increased significantly, and on the other hand, the melting of glaciers in the upper reaches of spring and summer absorbs a large amount of heat, resulting in lower than usual local temperatures in the interior, reducing the temperature difference between the inland and the ocean, and then causing the monsoon to weaken, and the lack of water vapor brought by the monsoon from the sea surface to the inland. Although global warming has increased the flow of upstream water by melting glaciers, it has not offset the effects of increased evaporation and weakening of the monsoon.

As a result, the amount of water in the middle and lower reaches is decreasing year by year.

2.Vegetation destruction - The Loess Plateau has serious vegetation destruction, the land lacking vegetation conservation is gradually desertified, the evaporation becomes high, and the dry groundwater needs to be continuously absorbed and flowed through the river to replenish.

3.Backward irrigation methods -- most of the middle and upper reaches of the Yellow River flow through economically underdeveloped areas and poor areas, lacking water-saving irrigation technology and funds, and most of them are flooded, and the Yellow River is seriously wasted.

The upper reaches belong to the arid and semi-arid areas, the precipitation rate is low, the middle reaches are the main recharge areas, but the soil erosion is serious and the seasonal changes are large, and the downstream basin area is small and the recharge is small.

The population in the basin is growing rapidly, and the population growth rate is far outpacing the food growth rate;

In recent decades, with the development of society, the water consumption of industries and cities along the Yellow River has been increasing, and the irrigation area of the Yellow River has been expanding.

The regulation capacity of reservoirs is low, and the management of water resources is not uniform;

The water fee is low, and the low water price cannot arouse people's awareness of water conservation, and the waste of water in industry and agriculture is huge;

Environmental pollution has dramatically reduced the utilization rate of the Yellow River's water.

There are many reasons for the interruption of the flow, which can be summarized as follows:

Global warming. With the intensification of global warming in recent years, on the one hand, the evaporation of the river channel has increased greatly, and on the other hand, the melting of the upper glaciers in spring and summer absorbs a large amount of heat, resulting in lower than usual local temperatures in the interior, which reduces the temperature difference between the inland and the ocean, and then causes the monsoon to weaken, and the lack of water vapor brought by the monsoon from the sea surface to the inland. Although the melting of glaciers due to global warming has increased the flow of water upstream, it has not offset the effects of increased evaporation and weakening of the monsoon.

As a result, the amount of water in the middle and lower reaches is decreasing year by year.

Destruction of vegetation. The vegetation in the Loess Plateau is seriously damaged, the land lacking vegetation conservation is gradually desertified, the evaporation becomes higher, and the dry groundwater needs to be continuously absorbed and flowed through the river to replenish.

Irrigation methods are backward. Most of the middle and upper reaches of the Yellow River are economically underdeveloped and marginal and poor areas, lacking water-saving irrigation technology and funds, and most of them are flooded, and the Yellow River is seriously wasted.

Measures: planting forests and grasses, greening the earth, and improving the local climate Planting forests and grasses, expanding vegetation coverage, developing ecological economy, combining resource development with soil and water conservation, conserving water sources, conserving water and soil, preventing soil erosion, improving local climate, reducing flood hazards, increasing soil fertility, and increasing underground runoff.

Control the number of the population and improve the quality of the population.

1. The frequent interruption of the lower reaches of the Yellow River has directly affected the water used for urban and rural life and industrial and agricultural production that depend on the water supply of the Yellow River, especially the water used by the Shengli Oilfield, and 2. The water environment capacity has decreased, which has aggravated the water pollution and deterioration of the water environment of the Yellow River. In particular, the siltation of the downstream riverbed is not only a "small flood disaster", but also a danger of breaking the channel and diverting it at all times, which seriously threatens the safety of people's lives and property downstream;

3. Aggravate the salinization of land in the estuarine area, degrade the estuarine wetland ecosystem, and reduce biodiversity, making the beautiful and rich Yellow River Delta increasingly impoverished. This will have a profound impact on the economic development of the Yellow River Basin at present and in the next century.

4. The water shortage caused by the intensification of the flow interruption and the threat of downstream rupture will shake social stability, and the consequences will be endless.