How much do you know about the greenery in the desert?
When it comes to deserts, people's first impression is often desolate, yellow sand, and lifeless. In the midst of this seemingly endless desert, there is a green oasis of wonder. The oasis is like a wonderland in the desert and brings hope to people. So, do you know how difficult it is to exist in this green sand?
Oases are formed without an abundant and uninterrupted supply of water. Normally, there are underground rivers in the desert, and most of these underground rivers are sourced in nearby mountains. In winter, these mountains are covered with a thick layer of snow, and in summer, when the snow melts, the snow water flows down the cracks in the mountains to the low-lying areas, hiding in the sandy soilAfter years of erosion and precipitation, a dark river was formed, and finally became an oasis.
The Oasis doesn't last long. It seems to be extraordinarily small in the vast desert, and its petite body can't resist the erosion of wind and sand after all, and it is swallowed up like water coming to cover the earth. The Sahara Desert, known as the largest desert in the world;However, the Sahara Desert, once a vibrant oasis in ancient times, is now a place of vastness and desolation.
In the face of the severity of desertification, there have been people, even generations, who have taken root in the desert just for that touch of green;Sun Guoyou, a sand control man, is one of them, and he spent ten years and did not hesitate to exhaust tens of millions of family properties, just to turn 10,000 acres of yellow sand into 10,000 acres of oasis. Of course, there are many, many more such cases. One can imagine how difficult it is for the oasis to survive in the desert.
Unexpectedly, the crescent spring of Mingsha Mountain in Dunhuang is an "accident". The Crescent Spring Mingsha Mountain is a scenic spot in the south of Dunhuang in Gansu Province, and the reason for its fame is because of the existence of the Crescent SpringCrescent Spring is a magical place, famous for its thousand-year-old spring water that does not dry up. Mingsha Mountain is a small hill formed by "flowing sand", and the crescent moon spring is surrounded by sand mountains, like a crescent moon, and the crescent spring water is crystal clear, like a mirror, it is a natural oasis.
The reason why the oasis exists is that there must be a steady stream of water to feed it, so the water source of the crescent spring comes from?The crescent moon spring in the history of the Dang River never seems to be exhausted, that is because there is an ancient river buried under it, and it is precisely because of the existence of this dark river that the crescent spring is constantly fed, so as to ensure that the water of the crescent spring will never be exhausted. The Dang River and the Crescent Spring are only kilometers apart, although the distance is very close, but the Dang River does not flow directly from the ground into the Crescent Spring, but when the water of the Dang River is higher than the Crescent Spring, the river water will infiltrate underground and flow into the dark river under the Crescent Spring due to the gravity of the drop. The abundant water of the Dang River is partly recharged by the snow water after the glacier melts, and the rain replenishes it, which can be said to be endless.
Today's crescent spring is no longer what it used to be, and the current crescent spring water is no longer the original "spring water", but artificially replenished water. As early as the last century, the locals pumped part of the water from the crescent spring for irrigation needsIn addition, as a tourist attraction, man-made commercialization and the emergence of a large number of pollution sources have shattered the local ecological balance. It is said that in order to restore the original pure and beautiful appearance of the crescent spring, the local ** did not hesitate to spend 100 million yuan to continue its life.
Crescent Spring