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 |
| Southern Tibet : vol.4 | |
| 南チベット : vol.4 |
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引用情報
THE BUP-CHU AND THE DANGBÄ-LA. 337
From Chesang-la the view to the south is open only between S. 24° E. and S. 86° W., as shown on Pan. 136, Tab. 24. The mountain range visible in this direction is the one with the pass Dangbo-la or Dangbä-la, the next we had to cross. Pan. I 3 7A and B, Tab. 25, is taken from Camp CXX. To the N. W. it gives the contour lines of the mountains Singe-kanyak, Tseri-rakpa and Kunge and between them the valley Kunglung. To the N. N. W. it shows the range of Chesang--la and to the N. N. E. the mountainous region of Tulung- nukpo. To the N. 85° E. it has the peak Chamdung-, to the S. S. E. the road down to Bup-cltu which we had to follow the next day, east of the mountain group Teri.
If the march between the two last camps formed a convex line crossing a pass, the march of February 2nd forms a concave line crossing a river, the BV-chu. It has, therefore, to be divided into two sections, the first from Camp CXX to the river descending to an altitude of 4,467 m., or 168 m. lower; the distance is 6 km., the rate of slope as 1:35.7 and the direction S. S. E. The ascent south of the river in the valley of Dangbo-chu or Dang-bd-chu is 15 2 m. to Camp CXXI, Tamring, which is at an altitude of 4,619 m., the distance being 7.7 km. S. E. and the rate as I:50.7, showing that the slope falling to the north is, as usual, less steep than the one falling to the south. The river Bup-chu flows westwards in a narrow latitudinal valley between two parallel ranges, and joins the Mü-chu opposite Ling:a -gompa.
From the point where our road crosses the Bup-chu, Pan. 139, Tab. 25, is taken. To the N. i5° W. it shows the valley by which we have come down from Chesang-la, to the N. 7o° E. the valley by which the BV-chu comes down and which, for a more or less considerable distance serves as a hydrographical boundary between two parallel ranges of the Transhimalaya, viz., the one of Chesang'-la and the one of Dangbo-la. To the W. S. W. the Bup-chu valley continues down to
the Mü-chu.
The next day's march, on February 3rd, again forms a convex line crossing a new pass, Dangbä-la. Here an irregularity enters in the morphological law prevailing hitherto, viz., that the northern slope is more steep that the southern. From Camp CXXI we have 1 1.4 km. S. S. E. to the pass which is at an altitude of 5,25o m., being a rise of 631 m. or as I :I8, whilst the descent on the southern side is 13 km. S. E. to Camp CXXII, Ngartang, 4,909 m. high, or 341 m. below the pass, the slope being here as 1 :38. The slope to the north from Dangbä-la is, therefore, more than twice as steep as the slope to the south.
Panorama 135, Tab. 2 4, gives a view to the S. E. from the pass, showing the range of Ta-la, the one we had to cross the next day. Pan. 138, Tab. 2 5, is a nearer view of a part of the same range.
The range we crossed in Dangbä-la is probably the western continuation of the famous Nien-then-lang-la, which, like the preceding ranges, farther west is pierced
43. Iv.
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