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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| 0047 |
On Ancient Central-Asian Tracks : vol.1 |
| 中央アジア踏査記 : vol.1 |
引用情報
OCR読み取り結果
Pacific drainage area, which along the Huang-ho or Yellow
river extends to the adjoining parts of the Kansu province
and to the north-eastern uplands of Tibet. Favoured by the
moisture which air currents from the Pacific Ocean carry
up at different seasons of the year, abundant vegetation
clothes the valleys from the westernmost limits of the drain-
age of the Su-chou river. To eyes accustomed to the barren-
ness of the K'un-lun it is an impressive experience to see the
excellent summer grazing offered by the open valleys at the
headwaters of the Su-chou and the Kan-chou rivers, not-
withstanding the great elevation, in parts well over 11,000
feet. Still farther to the south-east increasing snow and rain-
fall permits of plentiful forest growth in the valleys drained
by the Kan-chou river in the northernmost range of the
Nan-shan (Fig. 4).
We have now arrived close to the watershed of the region
which the Huang-ho drains into the Pacific Ocean, and
thus to the eastward border of that wide belt of innermost
Asia with which we are dealing. This is strikingly brought
home to us by the fact that from the edge of the Kan-chou
oasis eastwards climatic conditions along the fertile foot of
the Nan-shan permit of cultivation being carried on with-
out irrigation and dependent on rain and snowfall only.
But none of this moisture reaches the ocean.
From here we must turn back in order to complete our
circuit of the mountains. Westwards of the Etsin-gol which
carries the waters from the Nan-shan into a drainageless
basin there extend the barren ranges and plateaux of the
Pei-shan (the 'Northern Mountains'). These merge into
the equally arid hill chains known by the Turki name of
Kuruk-tagh, the 'Dry Mountains'. These again continue the
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571
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578
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