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
0241 Southern Tibet : vol.2
南チベット : vol.2
Southern Tibet : vol.2 / 241 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

CHAPTER XXIII.

THE DEPTH OF THE MANASAROVAR.

In the course of time the outlines of the Manasarovar, as well as those of the
Rakas-tal, have, on various maps, been represented in very different ways, all from
the famous Lama map of d'Anville and down to the maps of our days. The Manasa-
rovar has a very regular outline, is almost round, or a little oblong, from north to
south, whereas the Rakas-tal is more irregular in form. Ryder's map of the lakes is
a very good piece of work, though he had no opportunity to visit the southern
shores. So far as my own map is concerned the survey of the Rakas-tal, which I
carried out by land, following all the irregularities of the shore-line, is better than
that of the Manasarovar where the eastern, southern and western shores were mapped
from the boat, and only the northern shore by land. A survey from a boat is of
course more liable to errors on account of currents and winds.
Even the first sight of a map of the Manasarovar, and still more of the country
itself would make you suspect that the greatest depths were to be found in the
southern part of the lake. For here the enormous Gurla-mandata is much nearer
than the comparatively lower mountains in the north. And as we have seen, the
fans from Gurla slope steadily down to the very shore and dip into the lake, whereas
a comparatively extensive plain is situated between the foot of the Pundi mountain
and the northern shore.
My soundings proved that the Manasarovar is probably the deepest lake of
Tibet; at any rate it leaves far behind all other lakes I have sounded during earlier
expeditions. In 1900 I had found 48.67m. in a fresh-water lake in the eastern part
of the Tibetan plateau-land, and in 1901 I had got 47.50m. in the Panggong-tso.¹
But the Manasarovar had a depth of no less than 81.8m. and the deepest
part is in the southern half of the lake and nearer the western than the eastern
shore. In vain I waited for an opportunity to sound the Langak-tso or Rakas-tal,
but was prevented by continuous hard wind. If it be true, as the Tibetans assert,