The Water Of The Sobat Is Yellowish, And It Colours
That Of The White Nile For A Great Distance.
By dead reckoning I made
the Sobat junction 684 miles by river from Khartoum.
When I saw the Sobat, in the first week of January 1863, it was
bank-full. The current is very powerful, and when I sounded in various
places during my former voyage, I found a depth of twenty-six to
twenty-eight feet. The volume of water brought to the Nile by this river
is immense, and the power of the stream is so superior to that of the
White Nile, that as it arrives at right angles, the waters of the Nile
are banked up. The yellow water of the Sobat forms a distinct line as it
cuts through the clear water of the main river, and the floating rafts
of vegetation brought down by the White Nile, instead of continuing
their voyage, are headed back, and remain helplessly in the backwater.
The sources of the Sobat are still a mystery; but there can be no doubt
that the principal volume must be water of mountain origin, as it is
coloured by earthy matter, and is quite unlike the marsh water of the
White Nile. The expeditions of the slave-hunters have ascended the
river as far as it is navigable. At that point seven different streams
converge into one channel, which forms the great river Sobat. It is my
opinion that some of these streams are torrents from the Galla country,
while others are the continuation of those southern rivers which have
lately been crossed by the slave-hunters between the second and third
degrees of N. latitude.
The White Nile is a grand river between the Sobat junction and Khartoum,
and after passing to the south of the great affluent the difference in
the character is quickly perceived. We now enter upon the region of
immense flats and boundless marshes, through which the river winds in a
labyrinth-like course for about 750 miles to Gondokoro.
Having left the Sobat, we arrived at the junction of the Bahr Giraffe,
thirty-eight miles distant, at 11 a.m. on 17th February. We turned into
the river, and waited for the arrival of the fleet.
The Bahr Giraffe was to be our new passage instead of the original White
Nile. That river, which had become so curiously obstructed by masses of
vegetation that had formed a solid dam, already described by me in "The
Albert N'yanza," had been entirely neglected by the Egyptian
authorities. In consequence of this neglect an extraordinary change had
taken place. The immense number of floating islands which are constantly
passing down the stream of the White Nile had no exit, thus they were
sucked under the original obstruction by the force of the stream, which
passed through some mysterious channel, until the subterranean passage
became choked with a wondrous accumulation of vegetable matter. The
entire river became a marsh, beneath which, by the great pressure of
water, the stream oozed through innumerable small channels.
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