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
『東洋文庫所蔵』貴重書デジタルアーカイブ

> > > >
カラー New!IIIFカラー高解像度 白黒高解像度 PDF   日本語 English
0739 Southern Tibet : vol.7
南チベット : vol.7
Southern Tibet : vol.7 / 739 ページ(白黒高解像度画像)

New!引用情報

doi: 10.20676/00000263
引用形式選択: Chicago | APA | Harvard | IEEE

OCR読み取り結果

 

THE VALLEY OF THE TSANGPO.

543

The difficulty in comparing the three latitudinal valleys becomes most evident when we begin to deal with the absolute altitudes. In the northern valley we found a fall of hardly 3 0o m. from Selling-tso to Panggong-tso, a distance of 930 km. ; in the second valley the fall to the west and east from the meridional range of Targo-gangri is extremely slow. In both cases we meet the great evenness that is characteristic of a plateau-land. In the Tsangpo valley we find a continuous fall which, though very slow in itself, is considerable when compared with that of the two northern valleys. It is therefore inadequate to talk of a mean altitude of this valley, which east of Shigatse gradually assumes more and more of the wild morphology of the peripheric regions. In the following examination I have entered some of my altitudes along the Tsangpo from Changtang, opposite Shigatse, to the source where the Kubi-tsangpo comes out from below the glacier snout. The five first altitudes are from the lowest part of the course, the five next from the midst and the five last from the uppermost part of the course.'

Above Changtang    3 815 m.

Changtang     3820 »

Between Shigatse and Sadung     3850 »

Between Rungma and Sta-nakpu     3891 »

Between Ye and Rungma     3908 »

Between Ye and Pusum    4019 »

Confluence of Dok-chu and Tsangpo     4013 »

Confluence of Chaktak-ts. and Tsangpo    4524 »

Confluence of Tsachu-ts. and Tsangpo     4565 »

Camp CLXXXVIII     4583 »

Between Camp CXCI and Camp CXCII     4612 »

Camp CXCI     4608 »

Chärok     4657 »

Shamsang    4697 »

Source     4864 »

The mean altitude thus is 4295 m., or 169 m. lower than the Selling-tsoPanggong-tso depression and 397 m. below the Nganglaring-tso —Tengri- nor depression. Taking the highest portion of the Tsangpo valley from the source to Camp CXCII we get a mean altitude of 4689 m., which is nearly exactly the same as that of the Nganglaring—Tengri-nor depression (4692 m.). This portion of the

I There cannot be any appreciable difference between the three first altitudes, as they are taken very near one another, and it would give a better result to take the mean of them. But they are founded on direct observation, and they are needed here as a counter-balance to the five from the middle and the five from the uppermost part.