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Ask for a paper on historical loulan
A paper on using space remote sensing technology to solve the mystery of the disappearance of Loulan ancient city has recently attracted academic attention. This paper holds that two geological landslides blocked the ancient Peacock River and cut off the water source, and the ancient city of Loulan was abandoned due to lack of water and eventually died out. Recently, the exploration of the mystery of the disappearance of the ancient city of Loulan has once again aroused academic interest, because of a paper by two researchers, He Yuhua and Sun Yongjun, China Land and Resources Aerogeophysical and Remote Sensing Center. In this paper, which was published in the second season of Remote Sensing of Land and Resources, the authors said that they used space remote sensing technology and interpreted satellite images to find the real reason for the disappearance of the ancient city of Loulan. Loulan, the literary union of China, was once a bright pearl on the Silk Road, but for some reason, this northwest land suddenly disappeared mysteriously, leaving no words in the history books. 190 1 year, Swedish explorer Sven Hedin discovered the "Ancient City of Loulan" with the help of local tour guides, and declared that it was "the reappearance of Pompeii in the desert", which shocked the world. What followed was 100 years of debate on the reasons for Loulan's disappearance, which has not been conclusive so far. An article entitled "Exploring the Death Mystery of Loulan Ancient City by Satellite Remote Sensing" was published in the magazine "Remote Sensing of Land and Resources" on June 15 this year. The authors of this article, He Yuhua and Sun Yongjun, are convinced that they have found the answer to the death of the ancient city. Using space remote sensing technology, they found that there were dammed lakes and two geological landslides in the upper reaches of Loulan ancient city through the interpretation of satellite images. The distribution of water supply sources and ancient rivers in Loulan area is studied and analyzed from the perspective of environmental geology. Based on this discovery, they believe that the reason why the ancient city of Loulan in Xinjiang finally disappeared was that there were two landslides and collapses in the upper reaches of the ancient Peacock River where the ancient city was located (8.5 km and 20 km upstream of the ancient city, respectively, the former was smaller and the latter was larger), which blocked the river and formed a dammed lake, thus cutting off the water supply source of the ancient city of Loulan. The ancient city of Loulan was abandoned or even died because of lack of water. Wang Changlin, an associate researcher at the Institute of Remote Sensing Application of Chinese Academy of Sciences, said that this paper analyzed the regional paleogeographic environment through remote sensing images, and pointed out that the ancient landslide was the main reason for the ancient dammed lake in this area. Using remote sensing images, especially high-resolution images for analysis, is an effective means for archaeology, including paleogeographic environment research. Therefore, the viewpoint of this paper is worthy of attention. This paper puts forward a new understanding of the reasons for the disappearance of Loulan ancient city, which shows that remote sensing can play a great role in archaeological research. However, many experts disagree with this view. Wang Shouchun, a researcher at the Institute of Geographical Sciences and Resources, Chinese Academy of Sciences, believes that the view of landslide cannot be established and there will be no landslide at all. They concluded from the interpretation of satellite images that they may not know much about the situation on the ground. The relative elevation difference of Ya Dan terrain north of Loulan is only 20 meters at most; The relative height difference of Ya Dan landform to the west of Loulan is only a few meters, and the relative height difference of landform at 20km is not very big. There is no possibility of landslide in such a place. The lower reaches of Tarim River are plain areas, and river diversion is very common. Moreover, the Tarim River floods every year, just like the lower reaches of the Yellow River. When the flood comes, the river is easy to change its course on the great plains, not necessarily because of landslides. Meng Fanren, a researcher at the Institute of Archaeology of the Chinese Academy of Social Sciences, said that the key problem is that they can't determine the age of the dammed lake. If Loulan City was abandoned because of the dammed lake, it must correspond to the era when it was abandoned. If we can't determine the time, it can't be said that Loulan City was abandoned because of this dammed lake. To solve this problem, Mr. Li Tingqi of China Land and Resources Aviation Geophysical Prospecting and Remote Sensing Center quoted a passage from "Buddha Country" published by the Northern Wei Dynasty: "There is no bird in the sky, no beast in the sky, and you can't know what you want, so you can only take bones as symbols." Mr. Li believes that this description shows that Lop Nur had dried up at that time, and the fundamental reason was the landslide in its upper reaches. Meng Fanren, on the other hand, thinks that his passing through Loulan is not clearly recorded in the Tale of the Buddhist Kingdom published by Faxian in the Northern Wei Dynasty. This description is applicable to any place along this route, and there are different opinions on whether he must have passed through Lop Nur at that time. He didn't point out Lop Nur at all, nor did he write about the lake. Take the route of Lop Nur after leaving Yumenguan, almost from generation to generation; Moreover, many descendants did not go from Lop Nur. After leaving Yumenguan, they left obliquely to the southwest. Wang Changlin also made some suggestions. He said that the paper only suggested that the landslide could be seen from the image, but did not analyze the source of the landslide, and gave strong evidence of whether the landslide really existed, so it is necessary to make in-depth analysis and research on the landslide. If the landslide really exists, this paper really puts forward new insights and understandings on the disappearance of Loulan ancient city, which deserves attention. (Science Times) China www.lwlm.com Paper Alliance