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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| 0266 |
Southern Tibet : vol.2 |
| 南チベット : vol.2 |
引用情報
OCR読み取り結果
This was during a summer with very little rain. On July 25th, 1907, the
Samo-tsangpo had only 0,73 cub.m. On July 23rd, 1908, the same river had
4.89 cub.m., or nearly 7 times as much water, which came down, however, after a
very heavy rain. The channel from the two lagoons, receiving Patchen, Pachung
and Lugnak, carried on August 20th, 1907, 1.76cub.m. and on July 25th, 1908
at exactly the same place, 4.01cub.m., without being immediately influenced by
rain. It is therefore no exaggeration to say that in 1908 three or four times as
much water reached the Manasarovar, as in 1907. In the following years the amount
was still increasing as we have seen.
The list given above shows that the Tage-tsangpo, with 11.26cub.m., is in-
comparably larger than any one of the rest. The next largest is the Namreldi
from Gurla-mandata with 2.86cub.m. Then comes the Pachung-chu with 2.36
cub.m. Samo-tsangpo comes as No.10 in the list, only two brooks being smaller.
Some attempts have been made to award the honour of being the source of the Satlej,
to the Samo-tsangpo, or, at any rate, that this river with the same right as the Tage-
tsangpo could be regarded as such. But it is not sufficient to look up the map and
decree that one river or the other should be accepted as the source of the Satlej.
Only actual measurements can decide the question. Now the Tage-tsangpo carries, even
at its mouth in the lake, 5 times as much water as the Namreldi at the foot of the
mountains, and 15 times as much as the Samo-tsangpo. So there can be no doubt
which of the affluents to the Manasarovar must be regarded as the source of the
Satlej, — from a hydrographical point of view.
It could perhaps be objected that this holds good only for the year in which
the measurements were carried out and that the distribution of water may be other-
wise in rainy years. But then we only need to remember that the Tage-tsangpo,
in a very dry year, was 2 or 3 times larger than the Samo-tsangpo in a rainy year,
and just after a heavy rain. And comparisons should of course be made under sim-
ilar conditions prevailing all over the drainage area. Proportionately the volumes
of the 12 water-courses will always and under all conditions be the same as I found
them in 1907.
Finally it should be remembered that the historical points of view exactly
agree with the hydrographical results.
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18
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30
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41
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51
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62
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73
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83
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95
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109
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121
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132
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144
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155
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167
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177
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187
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198
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209
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223
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237
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249
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259
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264
265
266
267
268
269
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279
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289
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305
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323
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334
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345
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356
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367
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381
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393
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403
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415
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428
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445
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461
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473
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487
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503
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517
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532
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