IIIFカラー高解像度
国立情報学研究所 - ディジタル・シルクロード・プロジェクト
| |||||||||
|
| IIIFカラー高解像度 |
| Southern Tibet : vol.4 | |
| 南チベット : vol.4 |
 |
 |
 |
 |
 |
 |
|
|
 |
|
|
|
|
|
|
|
|
引用情報
THROUGH THE REGION OF AKSAI-CHIN.
^2 J
we were now approaching. The march goes to the north, N. N. W. and west and
the distance is 3o km. to Camp VII, where the height is 4,953 m., or a fall of 157 m. since Camp VI, a rate of 1 :191. It should, however, be observed that the ground
falls gradually all the way to the point where the direction is changed to the west, and where the altitude is probably only 4,900 m. From there, approaching Camp VII near the base of the western mountains, the ground again rises, imperceptibly to
the eye, it is true, but still reaching 4,953 m.
From a climatic point of view the march was also extraordinary. There was
no snow- or hail-storm, no wind, no clouds, the sun even burning hot, and, having
left the little dying brook at Camp VI, we saw not a drop of water until we reached the spring at Camp VII. We, therefore, crossed a very arid and dry part of the plateau-land. The absence of running water indeed proves that this part of Tibet is always protected against precipitation. For even if snow- and hail-storms of the kind we had just experienced very often pass over the highlands, their precipitation vanishes, as we have seen, in the course of an hour, evaporating in the extremely dry air. At any rate the precipitation is not sufficient to form lasting brooks. Pro-
ceeding N. E. from Chang-lung yogina we have seen how the running water became more and more scarce. The brook we had followed for three and a half days, and which goes down to the little lake, and perhaps is its principal feeder, carried, in spite of its coming from the Kara-korum water-parting, very little water. The brook from the low threshold vanished after a course of only 9 km. The farther we proceeded from the Kara-korum water-parting range the drier the ground became. This part of N. W. Tibet may certainly be regarded as the driest of the whole country, perhaps excepting the region around Akato-tagla in the far N. E. Those parts of
the Kwcn-lun System where the Kara-kash and Yurung-kaslz have their sources must, on the other hand, be rich in water. It is only the plateau-land between the two systems that may be regarded as an arid highland desert.
A short distance below Camp VI there was a little knoll of red weathered and rotten limestone, the only living rock within reach the whole day. Even gravel was very rare. The comminution of the débris had advanced as far as possible, and the whole ground consisted in fine, yellow dust, extremely soft and dry. In this soft ground there are millions of rabbits' holes. Yapkak grew all over the plain with a few interruptions. On some slopes fairly good grass appeared. The plain which
now opens up to our right is nearly level, and without instruments, since the bed of the brook has vanished, it would have been impossible to tell in what direction it falls. To the east the plain is bounded by low, red, rounded hills. Our route follows along the foot of the western hills, which, at one place, had a nearly verti-
cal slope. Turning N. N. W. we have a very extensive plain in front of us to the north, bounded by a range with some snow. The bed of a dry watercourse is directed
|
|
|
|
|
|
|
|
|
Copyright (C) 2003-2019
National Institute of Informatics（国立情報学研究所）
and
The Toyo Bunko（東洋文庫）. All Rights Reserved.
本ウェブサイトに掲載するデジタル文化資源の無断転載は固くお断りいたします。