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
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| IIIFカラー高解像度 |
| Southern Tibet : vol.4 | |
| 南チベット : vol.4 |
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引用情報
CHAPTER XXVIl.
THE SECOND CROSSING OF THE TRANSHIMALAYA.
Before proceeding to the hypsometrical relations and the panoramas along my second crossing of the Transhimalayan System, a few words should be said regarding our road along the Tsangpo, and the panoramas pertaining to this part of my journey.'
From the village Chang-tang where I crossed the Tsangpo a few kilometers N. W. of Shigatse, to the confluence of the Dok-chu with the Tsangpo, a little above Chaga or Camp CXXXV, the distance along the road on the northern bank will be 93 km. — if I calculate a short-cut from Camp CXXXII to Camp CXXXIV, instead of going up to Camp CXXXIII at Ye.2
The absolute altitudes obtained from a boiling point thermometer and three ane-
roids are, as I have said before, too much dependent on the atmospheric pressure to be quite reliable. Along a river with a very slow fall one becomes, of course, very sensitive regarding the altitudes given by the instruments. However, I think that 3,85o m. will be fairly near the real altitude of the Tsangpo at Chang-tang, and 4,013 m. at the confluence of the Dok-chu and Tsangpo.3 For the distance of 93 km. the fall of the river would, therefore, be 163 m. , and the rate of fall as 1:571. Though this fall is very gradual it is steeper than we have found in the Upper Indus.
The panoramas along this section of my road are meant to give an impression of the mountainous landscapes of the Tsangpo valley. Panorama 143, Tab. 2 5, is taken from Camp CXXVI, the village of Rungma, and embraces only the hills to the south and S. W., — those to the north being too near.
Panorama 147A and B, Tab. 2 6, drawn from the village of Tana (Sta-nakpo) is more instructive as it embraces the whole valley, except a less important part
I Cp. Vol. II, p. 293 et seq.
2 From Tana to Chang-tang I travelled with boat on the river, though the red line on its southernmost branch has been omitted on Pl. 8.
3 If compared with the altitude of Chaga this figure is obviously too low, as Chaga, with 4,032 m., is only a few meters above the river.
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