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0394	Southern Tibet : vol.3
南チベット : vol.3

274

uncomfortable, roundabout road over the western ridge, which, however, has to be
used if the river rises more than 3 m. At Linga the Mü-chu is spanned by a
long bridge.

From the terrace slope on which Linga-gompa is built, one sees to the north
the mountains round Donglung, where the valley and the road turn in a right angle
to the west. To the N. 38° E. is a little valley called Kipuk, and N. 65° E. a moun-
tain called Pongra. Due east is a mountain called Luchen in the background of
Bup-chu. Yavo is a right tributary to the Bup-chu. To the S. 50° E. is mount
Gäbri, and to the right of it the valley Tsalung.

Above Linga the valley is generally as before, only at one place, Takar-tang,
is it wide; at Linga, the Bup-chu junction, the breadth is considerable, but higher
up the valley is sometimes as narrow as a gorge. From the left or east enter
Kipuk-nima and Melung-pu with slightly snow-covered mountains in the background.
Donglung-pu is the next. From the right we have: Niense-pu, the brook of which
is divided into two branches over the fan, and each has a bridge. Koruk is a valley
with some snow; then follows the Rechik; Chinchik is small, Langmar-pu is more
considerable. Here the height is 4 331 m, at Camp 143.

Not far above Linga the rock consists of phyllitic-quartzitic schist; at the
right side, opposite Tabu, and at Lang-metang the rock is pegmatite. A compact
mountain at the right bank, called Takar, forces the river to the above-mentioned
bend, Takar-tang. The terraces are 20 to 25 m high; blocks of all sizes are
very common.

On the section between Langmar and Govo a great change takes place, for
the valley, which so far has been meridional, now becomes latitudinal, running from
west to east, parallel with the stretching of the great water-parting range to the north;
the northern or left tributaries therefore now come directly from that range and not
from ramifications. These left tributaries are: Pukchung and Pukchen situated be-
tween high but rounded mountain groups and ridges; Ke-tsangpo, the greatest of all
tributaries above Bup-chu; it is also called Ogorung-tsangpo, although this name by
some informants is only fixed to its upper course or perhaps to a branch in its upper
part. Ke or Ker is a village near the junction. The mountains at the western side
of lower Ke-tsangpo are called Namnam, those to the east Ami-ri-rung. So far as
can be seen the Ke-valley comes from N. 10° W. and is regarded as a tributary
to the Govo, although now, in April, the Ke had much more water than the Govo,
which also forms rapids at the confluence; in the summer the Govo is said to carry
more water, which is doubtful. Above the junction the Govo had now hardly 1½
cub.m. water left. At any rate the Ke and Govo meet at Namnam-sumdo and form
the Mü-chu; at the junction the Govo-tsangpo is spanned by a bridge. So far as
can be seen from the junction the upper reaches of Ke or Ogorung-tsangpo are
surrounded by considerable mountain masses, being parts of the Pabla range. The
river is said to be formed by the brooks from several high valleys, and one and a

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