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the others being; Ethiopia, Sudan,
Egypt, Rwanda, Tanzania, Burundi, Democratic
Republic of the Congo, Eritrea and Kenya.
The ‘River Nile’. You don’t get a River Amazon
or a River Mississippi. The ‘Mighty Nile’ is in
terms of volume much smaller then many other
major rivers; only 2% volume of the Amazon,
15% of the Mississippi, 20% of the Mekong; its
flow is comparable to the Rhine. But there is
special significance to this river both in the past
and the present. Perhaps the most important
river in the world, it certainly touches all of
us with its history and mystic. There is little
doubt that success or failure in managing its
precious waters will spell success or disaster
for the peaceful development of North Africa
in the 21st century. Egypt is and was the “Gift
of the Nile” (wrote Herodotus the Greek ‘Father
of History’ who lived in the 5th century BCE)
and its gifts of water and rich Ethiopian mud
nurtured a civilization that flourished for almost
3000 years before the Roman Empire began.
Its banks witnessed the dramas of Joseph
and Moses, and the Holy Family found refuge
there from Herod. Until the Aswan High Dam
was constructed, the Nile rose and flooded the
Nile valley every summer, and ancient people
wondered why the river would swell during the
hottest and driest time of the year. This wonder
led naturally to the question about where the
Nile originated.
Until recently it was known as the longest river
in the world. The most distant source in ‘river
miles’ being from a spring in the Nyungwe Forest
in Rwanda which is 6,695km (approximately,
depending on where the river mouth is defined)
from where it reaches the Mediterranean Sea. In
June 2007 a team of Brazilian scientists claimed
to have found a new source for the Amazon
starting in southern Peru, putting the source of
that river 6,800km from the mouth. This debate
could be ongoing – note that the University of
Dallas Geology Dept. specify the length of the
Nile as 6825 km.
It is the only large river that flows south to
north and is unusual in starting in the volcanic
highlands of quatorial Africa while the second
half wanders through the largest and most arid
region on earth, the Sahara Desert, with its last
tributary (the Atbara) joining it roughly halfway
to the sea (most other great rivers join with other
large streams as they approach the sea). On its
journey from the centre to the north of Africa,
the river passes through remarkable geographic
diversity, matched only by the great diversity of
different peoples living along its banks and the
variation in flora and fauna to be found in the
Nile basin. There is a huge catchment area of
about 3,254,555 square kilometres (1,256,591
sq mi), about 10% of the area of Africa (From
Wikipedia) and more then 1/3 of the total size
of the USA.
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The two great tributaries, the White Nile and
Blue Nile, combine in Khartoum with the Atbara
River attaching itself downstream below Shendi.
The White Nile is the longer of the two principal
branches. In Uganda the White Nile is divided
into two sections. The ‘Victoria Nile’ flows from
Lake Victoria, past our home at Bujagali Falls,
through Lake Kyoga, then over Karuma and
Kabarega (Murchison) Falls into Lake Albert.
From there to the Sudanese border it is called
the ‘Albert Nile’. From Nimule it passes by Juba
and becomes known as the Bahr al Jabal (River
of the Mountain). For about 100km it crashes
down through some spectacular white |
water
sections and then levels out with the flow
disappearing into a huge area of swampland
known as the Sudd. This almost impregnable
section finally drains into Lake No where it is
joined by another river coming from the west
call the Bahr al Ghazal or Bahr al Arab, which
itself is 716 kilometres (445 mi) long. Just
downstream from Lake No is the confluence of
the Sorbat River. From there the Nile is known
as the Bahr al Abyad, or White Nile, from the
whitish clay suspended in its waters. The term “White Nile” is used in both a general sense,
referring to the entire river above Khartoum,
and a limited sense, the section between Lake
No and Khartoum.
In Uganda there are 2 main tributaries for the
Nile. The water from Lake Victoria flowing
along the Victoria Nile meets water from southwestern
Uganda at the north end of Lake Albert.
The catchment area for this water is formed by
the northern face of the Virunga Mountains,
the eastern faces of the Ruwenzoris and the
streams and rivers that wind their way to Lake
Edward. Likewise the rivers between Mbarara
and Fort Portal flow into Lake George and from
there eventually flow down the Semliki River
which in turn feeds the larger Lake Albert.
The most distant watersheds for the Nile are
located south of Uganda. The southernmost
source is in Burundi where water from a spring
over 2,000m above sea-level, on the slopes
of Mt Kikizi, eventually flows into the Ruvubu
River. The most distant source of the Nile (i.e.
farthest from the Mediterranean in ‘river miles’)
is located in Rwanda on the slopes of Mt
Bigugu. This furthermost spring is over 2,960m
high. Both watersheds flow into the Kagera
River which runs along the Rwanda / Tanzania
border and from there into Lake Victoria on its
western shore.
In subsequent articles I will be writing more
about; the geology and origins of the Nile, the
hydrology and man’s efforts to control and
better utilise the river, and the exploration of
the upper reaches. |
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