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
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| 0752 |
Southern Tibet : vol.7 |
| 南チベット : vol.7 |
引用情報
OCR読み取り結果
Putting together the nine principal folding-troughs of the Tibetan plateau-land
we get the following table:
Kum-köl valley . . . . . . . . . . . . . . . . . . 3875 (I)
My valley of 1896 . . . . . . . . . . . . . . . . 4927 (II)
Wellby's valley . . . . . . . . . . . . . . . . . 4895 (III)
The valley of Lake Montcalm—Gore-tso . . . . . . 5012 (IV)
The valley of Lake du sel rouge—Gomo-tsaka . . 4942 (V)
The valley of Lake Camp XLVI—Tsaggar-tso . . 4944 (VI)
The valley of Selling-tso—Panggong-tso . . . . . 4464 (VII)
The valley of Tengri-nor—Nganglaring-tso . . . . . 4702 (VIII)
The valley of the Tsangpo from source to Shigatse 4295 (IX)
Speaking of the Tibetan plateau-land proper the Kum-köl valley cannot be
considered, as it occupies an exceptional position north of the Arka-tagh, and the
Tsangpo valley does not at all belong to the plateau-land. The table shows a
difference of 548 m. between the highest and the lowest valley. The average altitude
of all the valleys is 4841 m., or 31 m. more than the summit of Mont Blanc. This
gives a clear idea of the enormous altitude of the great plateau, remembering that
we are dealing here with the depressions only, i. e. the lowest points existing in the
interior of Tibet. Here again the valley of Selling-tso — Panggong-tso is especially
conspicuous, being nearly 400 m. lower than the average. The table also shows
that the northern, most desolate and absolutely uninhabited half of interior Tibet, in
which the valleys II, III, IV, V and VI are situated, is higher than the southern half;
the average altitude of the five valleys being 4944 m., whereas the average altitude
of the southern valleys, VII and VIII, is 4583 m., or 361 m. less.
The average height of 15,000 feet or 4576 m. given by Sir SIDNEY BURRARD¹
is therefore too low. For even if the Kum-köl trough is entered in the calculation,
we get an average height of 4720 m. or 144 m. more.² But in this calculation we
have only made use of the lowest points, the depressions of the plateau-land, and
not of the convex protuberances between them, which have to be considered when
we talk of an average height of the whole plateau. To this calculation we shall have
to return in the next chapter where we also shall have to consider the mean alti-
tudes of the mountain systems of Northern and Central Tibet.
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17
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28
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38
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49
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60
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70
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81
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92
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105
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117
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128
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138
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150
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161
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177
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190
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202
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214
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225
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237
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251
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263
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277
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291
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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
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747
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750
751
752
753
754
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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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