Catalogue of chinese national geography Sichuan picture books

Hey, hey, I found it. September, 2003, chinese national geography Sichuan Album.

catalogue

P20 China people's scientific exploration of the Qinghai-Tibet Plateau.

P28 Memorabilia of Comprehensive Scientific Investigation on Qinghai-Tibet Plateau

Author/Liu Jing

P60 Facing Old Qinghai-Tibet

Writing/Liu Jing Photography/Zhang Mingtao, etc.

P76 China Dam: Wandering between expectation and condemnation.

Author/Wei Yi

P88 World Anti-dam Movement

Author/Fan Xiaoyishui

P 100 Digital Simulation Reproduces the Old Town of Beijing

Author/Lu Zhenggang Digital Image/Crystal Digital Technology Company

P 1 14 Longyan: an oasis on the tropic of cancer.

Writing/Guo Ru Photography/Pingjiang

Follow the footsteps of Japanese Xuanzang-Ren Yuan.

Writing. Photography/Translation by Adai/Zhu Yan

Geographical viewpoint

P 18 reading the Qinghai-Tibet plateau

Author/Ma Lihua

P70 Do you want to leave a natural river for future generations?

brief introduction

Rivers are alive, this is not a metaphor. William morris davis, an American geographer, has a famous theory of "erosion cycle". He divided the development process of rivers into three stages: youth, maturity and old age. In a certain area of the earth, the crust rises, the mountains rise, and rivers are born and begin to develop. The faster the crust rises, the deeper the river cuts. At this time, the river is turbulent and high-spirited, and the valley is V-shaped, which is in the midst of youth; With the deepening of the valley, the weathering of cliff stones on both sides of the river and the collapse and landslide under the action of gravity make the valley open and the slope slow. At this time, the river is full; When the crust slowly rises or terminates, the valley will become wider and flatter, and eventually the crustal uplift will be flattened, the valley will become a quasi-plain, the river will enter the old age, and finally the river will die. This is the life of the river. However, the life of rivers is very, very long, as long as millions of years, thousands of years.

Human activities will shorten the life of rivers. The biggest impact on the river is the planning of a dam on the river, called cascade development. There used to be a very fashionable concept-channelization of rivers, which was to channelize natural and wild rivers by building one dam after another. In fact, this dam is like a nursing home for the river, allowing the river to enter the old age ahead of schedule. The life of the river seems to be a little far away, and the time scale is too large for human beings to witness the life of individuals, but the lives of those artificial dams can be witnessed by people.

I just went to Sichuan. On the way from Chengdu to Kangding, I saw a reservoir on the Qingyi River, which was filled with pebbles carried by the river, and the river rushed down from the dam top. As a reservoir, its life has ended.

The Hengduan mountain area in western Sichuan is full of deep valleys and fast-flowing rivers. This scene is beautiful in the eyes of tourists, but rich in hydropower in the eyes of hydropower developers. On the Sichuan-Tibet line, I saw that the expressway was forced to change its route. It turns out that a hydropower station is being built here. When I left the Sichuan-Tibet line and drove to a country road, I was intoxicated by the picturesque pastures and Tibetan residents on both sides of the river. My tour guide told me that it was also planned as a hydropower station. ......

The trip to western Sichuan gave me the impression that it seems that every river has been planned by hydropower builders how many dams to build, not just planning, but dam sites are everywhere in the deep mountains and canyons. China seems to have entered the peak period of hydropower construction.

Back in Beijing, I came into contact with an important news that a dam was to be built on the Nujiang River in Yunnan, which caused a discussion. An important topic of discussion is: Do you want to leave an original ecological river for future generations? Because the Nujiang River is one of the two rivers without dams in China (the other is the Yarlung Zangbo River).

I was shocked when I came into contact with this problem. Why is this question so powerful that it seems to wake people from a deep sleep?

There has been a long-standing debate about the ecological problems caused by the construction of dams on rivers, and the debate about the Three Gorges Dam has reached its peak. The reasons for advocating construction are very strong, such as the functions of power generation, flood control, irrigation and navigation, and the reasons for opposing construction, such as the obstruction of aquatic migration channels and environmental changes, mudslides, landslides, earthquakes, a large number of ecological immigrants, and the impact of estuary areas on embankments. ......

Under the strong pressure of "economic development", the view on ecology always seems pale and powerless, and finally the view of building a dam wins.

However, when a hydropower station is to be built on the Nujiang River, the views of those who oppose dam construction are uncharacteristic. They simply asked: Do you want to leave an original river for future generations?

The reason why this problem is powerful is that retreating into the corner after countless failures seems to be a heavy blow; It seems that rational complaints are ineffective and forced to turn to emotions.

The implicit premise of this question is: all rivers are cut off by a dam, can't any be left? The ratio here is "all to one".

Another meaning of this question is: can't we leave an original ecological river for future generations to study and watch? Even left an original ecological river, compared with those who built dams.

Leave an original ecological river for future generations. This question is a bit sad. Think about it, people's transformation of nature has penetrated into every corner of the earth. We always put forward nature and humanity relatively, but is there a pure natural landscape that human beings have not interfered with?

Leaving an original ecological river for future generations reminds me of a series of similar problems: for example, leaving an undeveloped coal field and oil field for future generations; Leave a wilderness for future generations, and even we can ask whether we should leave an unexplored area for future generations. Because children and grandchildren also have the desire and right to play in a wilderness?