I would like to talk about the drought in the southwest

The drought in the southwest is heart-wrenching.

But after reading some of the comments of some experts about the drought in the southwest, my heart hurts even more. Most of the experts' views are that it is caused by the general climate, and basically do not mention the human factors that cause drought due to the great damage to the natural environment, or deliberately do not mention it, and deliberately avoid this cause. In addition to the climatic factors, there are several reasons for the drought in the southwest.

First, a large area of eucalyptus trees. The southwestern provinces are now basically planting eucalyptus trees everywhere, and the hills in many places are planted on hundreds of thousands of acres, as far as the eye can see, and in addition to the fast-growing eucalyptus or fast-growing eucalyptus on the mountain, the water source forests are almost all cut down. When the fast-growing eucalyptus was planted in a large area at the beginning, there was nothing wrong, but after a few years, the influence of fast-growing eucalyptus came out, basically a large area of fast-growing eucalyptus hills or stone mountains, fast-growing eucalyptus grew very fast, so the water absorption was large, and the original small stream water in the mountain all the water volume was reduced or cut off, and these small creeks and small springs are often the source water of some rivers.

In addition, there are basically no other shrubs under the eucalyptus tree, at most only some small grass, few birds or pheasants appear, and the land is also very sandy. Large-scale planting, there is no water on the ground and less evaporation, where is the sky cloudy and rainy? Having lived in the countryside for many years, it can be said that I have witnessed the adverse effects of fast-growing eucalyptus, so I strongly disagree with the statement of some experts that fast-growing eucalyptus is harmless.

And who are the people who have the ability to contract a large area of fast-growing eucalyptus on the mountain?

Second, the elements of mining quarrying soil. Some mining quarries and red brick factories have not done a good job of environmental protection work while mining, and have filled up some springs, ponds, and streams at the foot of some hills and mountains, and the waterways have not been cleared. Anyone who lives in the countryside should know that many rivers have their sources at the foot of a hilly hill or a rocky mountain.

Third, the disrepair of water conservancy: Many water conservancy projects in rural areas have fallen into disrepair for a long time and have lost their functions, or have been destroyed because of development, such as mining or quarrying mentioned above.

Based on the above points, the destruction of the natural environment is also a factor in causing drought, but experts avoid talking about it. The natural environment is interlocking, cyclically interactive, and the ground water source has been greatly damaged. There is no water vapor on the ground to form clouds, what can rain to come?

Even if all the water conservancy is repaired, it is empty talk that there will be no water inflow.

The above views may be very one-sided, please correct the inaccuracies.

Personally, I believe that protecting the natural environment, not destroying water source forests, and planting more trees is the root cause.

As 70% of China's water resources in the southwest are facing the danger of depletion, the southwest region has such a rare drought, but the country's 1.3 billion people have to reflect on the importance of protecting water resources, especially in our water scarce and depleted areas, if we do not reflect, do not take warning, and do not protect water resources, one day the tragedy of drought in the southwest will befall us sooner or later.

Saving a drop of water is not a difficult task, and we can all do it. I hope that the drought in the southwest will end soon, so that the people in the southwest can live and work in peace and contentment. The drought in the southwest serves as a "wake-up call" for us to protect water resources, and it will ring forever. (Wu Xiande).

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The impression is that the car continues to drive and the air conditioner continues to be used.

I don't think the world will stop polluting for this, so don't think about anything, don't talk about anything.

If we humans continue to waste water, the last drop of water will be human tears.

If you don't drink dirty water, you can't do it!!

Cherish water resources.

People who waste water are miserable

Where did it go? Why is it so serious. I just knew...

1. Geographical reasons for drought in southwest China: since last autumn, southwest China has been controlled by dry and warm air, and the temperature is abnormally high, and the main weather system affecting precipitation in southwest China - the southern branch trough activity is weak, and the cold air in the north mainly penetrates from the southward path of the easterly, and rarely penetrates into the hinterland of the Yunnan Plateau, resulting in less precipitation in southwest China and drought in autumn and winter. Xiao Ziniu said, 2. "And these have a certain relationship with the formation of the El Niño event in the equatorial central Pacific Ocean in June last year, under the influence of the El Shou Niño, the convective activity in the South China Sea, the Indochina Peninsula to the western Indian Ocean was suppressed, which is not conducive to the warm and humid air mass activity in the Bay of Bengal and the Indochina Peninsula and Yunnan, resulting in less precipitation." ”

The southwest region due to the collision of tectonic plates. Causes the southwest to uplift. Formation of plateau areas. It is located in the inland and highland. Ocean precipitation is difficult to reach.

There are also the following aspects.

1) The karst landform in southwest China is extensive, and there are many karst caves and dark rivers underground, which is not conducive to water storage.

2) The southwest monsoon was weak and failed to reach the southwest of China;

3) The climate is arid in spring, the water vapor content in the air is small, the solid condensation nucleus is insufficient, and there are no conditions for the formation of precipitation'

4) There are many geological disasters in this area, with active plates and many faults, which is not conducive to the construction of large reservoirs, and the reserves of water resources are insufficient.

Recently, China's southwestern region is still in the midst of a drought that has not been seen in a century, and the continuous sunny, hot and rainy weather has led to the continuous aggravation of the drought situation in the five provinces, autonomous regions, and municipalities of Yunnan, Guizhou, Sichuan, Chongqing, and Guangxi.

The first is the influence of plateau thermal factors on the Qinghai-Tibet Plateau. Other provinces in southwest China are greatly affected by the "roof of the world", the Qinghai-Tibet Plateau last winter had less snow, the plateau thermal conditions are good, resulting in the weakening of the Indo-Burma trough, the weak South Asian monsoon, the water vapor transported to the southwest of China is not abundant, coupled with the cold air from the north to the south to the east and north, resulting in drought in the southwest region.

The second is the impact of El Niño. Under this influence, the sea surface temperature in the eastern equatorial Pacific Ocean is warmer, the subtropical high is stronger overall, and the water vapor carried by the East Asian monsoon meets the cold air from the north to the south, resulting in more precipitation in the eastern part of China and frequent snowfall in the north. On the contrary, the southwest region of China is dominated by downdrafts, and there are often sunny and sunny weather.

The third is that there is no cold air opportunity. Although there have been several cold air impacts on our country this winter, most of the cold air has started to move eastward in the north. With warm air forms the first conditions for rainfall:

Convective weather. However, if the second condition for the formation of rainfall, "water vapor", is not abundant, it still cannot form good precipitation.