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『東洋文庫所蔵』貴重書デジタルアーカイブ
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| 0739 |
Southern Tibet : vol.7 |
| 南チベット : vol.7 |
引用情報
OCR読み取り結果
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 300 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 mor-
phology 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 alti-
tudes 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.¹
Above Changtang . . . . . . . . . . . . . . . . . . . . . 3815 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-tso—
Panggong-tso depression and 397 m. below the Nganglaring-tso—Tengri-nor de-
pression. 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
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302
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315
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329
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342
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352
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363
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375
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386
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397
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407
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420
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432
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444
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457
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467
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478
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488
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499
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510
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520
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530
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541
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552
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563
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573
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583
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593
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605
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615
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625
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635
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646
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656
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666
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681
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693
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704
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714
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726
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737
738
739
740
741
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747
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758
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773
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788
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801
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813
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833
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848
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864
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876
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888
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