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 |
| Scientific Results of a Journey in Central Asia, 1899-1902 : vol.3 | |
| 1899-1902年の中央アジア旅行における科学的成果 : vol.3 |
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引用情報
A TIBETAN SALT LAKE.
I09
of Tibet. One would have to travel a considerable distance to the north as well as to the south in order to reach another point that lies as low as this.
Fig 80. Left. 0.96 1.77 2.41 2.46 2.82 3.34 2.88 2.51 2.14 1.28 Right.
63 72 79 8o 87 86 91 89 83 69
24 I 73 7o 33 66 35 15 48 77
— 3 10 40 20 31 19 9 9 2
—I I I 24 4 20 19 6 I o
Breadth = 58 in. Camp XXXIII. Aug. 24th.
At the place where we measured the river, the left bank makes, as the accompanying profile shows, a decidedly steep terrace, about 2 m. high, while the right bank is formed of the flat and narrow peninsula I have just mentioned, its surface being barren and strewn with gravel. Here the river had a breadth of 58 m., its maximum depth was 3.340 m.. its mean depth 2.052 m., its mean velocity 0.3634 m., and its volume 43.25 cub.m. in the second. Owing to the perfectly regular shape of the river-bed
the velocity decreased fairly uniformly with the depth. On the surface the current was lively, 0.744 m. on the average, with a maximum of 0.846 m. At a depth of 0.80 m. the mean velocity was 0.408 m., and the maximum velocity 0.716 m. ; at 1.35 m. the mean was 0.127 m. and the maximum 0.372; at 1.75 m. the mean was 0.065 m. and the maximum 0.223 m. Thus at the depth of 1.35 m. the mean velocity was only one-sixth of what it was at the surface. A counter-current flowed at the bottom close under the left or northern bank, and it is not improbable that there exists another counter-current in the deepest
Fig. 81. A CAMEL AND A SHEEP CROSSING THE RIVER.
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