LIBYAN I
ARABJAMAHIRIYA
00,
Jawf
Hydrography
IMO Lake, reservoir
River
Intermittent river
Basin boundary
River flows
Site of flow measurement(number raterences stakon tha tatke or graphsl
Key gauging station
Subsidary gauging station
Es ¡mate from public sources
Magnitude of annual flow [km1
< 3
3 to< 5
5 to< 10
10 to< 20
20 to< 40
40 to< 60
60 to< 85
Annual precipitation [mm]
50 mm isohyet
200 mm isohyet
Legend
Administration
Country boundary
Country boundary in dispute
0 Capitat, major city
5'303,
CENTRAL AFRICANREPUBLIC
Bahr el Aral,
...............'
SUDAN
Mediterranean Sea
EGYPT
Bukawu
Bujumbura'
Alexandria
DEMOCRATIC
REPUBLICOF THE CONGO,
AL Jizah.*.
5U 1U0 2U0 JOU km
43 Lambart contormat coma promcnon IWGS 12E41 BURUNOIStandard parattats 25°N and 2°N - Cantrat mandlan 32°E
, A
Ca i ro
,S,
,.
RWANDA Kigali \/ \
.........
Khartoum
....::":
....:.
'... Asw5n
;...'Lake **.
Nasser ...
M' SYRIAN ARABISRAEL ----REPUBLIC
,lerusale *Amman
(-4 it4
_ JORDAN
.. .....
7 1
1
t
(/Port Sudan
)
s)
ERITREA
LakeVietaria
Nairobi
Lake \_ 13:
Addis Ababa
7---z» UNITE!) REPUBLItOF TANZANIA
SAUDI ARABIA
Asmara
ETHIOPIA
a KENYA
IRAQ
Medina
Jiddah
'Mecca
HYDROLOGIC REGIME IN THE NILE BASIN Mean annual flow of the Nile and main tributaries upstream of Lake Nasser
Information Products for Nile Basin Water Resources Management GCP/INT/945/ITA
burundi d.r.congo egypt eritrea ethiopia kenya rwanda sudan u.r.tanzania uganda
DisclaimerThe designations employed and the presentation of material in the map do not imply the expression of any opinion whatsoever on the part of FAO concerning the legal or constitutional status of any country, territory or sea area, or concerning the delimitation of frontiers.
www.fao.org/nr/water/faonile
A project sponsored by the Government of Italy
The project attempted to strengthen the ability of the governments of the Nile Riparian Statesto take informed decisions on water resources policy and management matters regardingthe common Nile resource. It included a major capacity building component. The projectwas implemented under the umbrella of the Nile Basin Initiative.
Nr
21
22
23
24
25
26
27
28
29
30
Setit at Kurbur
Atbara at Wad el Hiliew
Rahad at mouth
Akabo (incl. Gilla & Mokwa)
Pibor
Bahr el Ghazal (K. Dolieb)
Bahr el Arab
Pongo
Tonj
Aswa
-
-
1908 - 1997
-
-
1937 - 1964
-
-
1944 - 1985
1940 -1977
7.0
4.0
1.1
2.8
1.0
0.3
0.3
0.6
1.4
3.0
1
2
3
4
5
6
7
8
9
10
River and Station Name
Main Nile at Dongola
Atbara at mouth
Main Nile at Tamaniat
Blue Nile at Khartoum
White Nile at Mogren
Dinder at mouth
Blue Nile at Diem
White Nile at Malakal
Sudd Outflow
Sobat at Hillet Dolieb
Data Period
1890 - 1995
1903 - 1994
1911 - 1995
1900 - 1995
1911 - 1995
1907 - 1997
1912 - 1997
1905 - 1997
1905 - 1983
1905 - 1983
Avg Ann Flow[km3]
84.1
11.1
72.7
48.3
26.0
2.8
48.7
29.7
16.1
13.5
16
17
18
19
20
11
12
13
14
15
Lake Albert outflow
Semliki at mouth
Lake Kyoga outflow
Lake Victoria outflow
Kagera at Kyaka Ferry
Baro at Gambeia
Baro at mouth
Lol at Nyamlel
Jur at Wau
Bahr el Jebel at Mongalla
1940 - 1977
1940 - 1977
1940 - 1977
1940 - 1977
1940 - 1978
1905 - 1959
1929 - 1963
1944 - 1985
1942 - 1986
1940 - 1977
32.8
4.6
28.6
28.6
6.3
13.2
9.5
3.2
4.5
36.0
Mean monthly flow in cubic kilometers (km3) at key stations (numbers indicated on map)
Mean annual flow in cubic kilometers (km3) at key stations (numbers indicated on map)
0
5
10
15
20
J F M A M J J A S O N D
0
5
10
15
20
J F M A M J J A S O N D
0
5
10
15
20
J F M A M J J A S O N D
Lake VictoriaOutflow(1940 - 1977)
19
Khartoum(Blue Nile)(1900 - 1995)
4
Sudd Outflow(1905 - 1983)
9
0
5
10
15
20
J F M A M J J A S O N D
0
5
10
15
20
J F M A M J J A S O N D
0
5
10
15
20
J F M A M J J A S O N D
Atbaraat Mouth(1903 - 1994)
2
Blue Nile at Diem(1912 - 1997)
7
White Nile at Mongalla(1940 - 1977)
15
0
5
10
15
20
J F M A M J J A S O N D
0
5
10
15
20
J F M A M J J A S O N D
0
5
10
15
20
J F M A M J J A S O N D
Nile atTamaniat(1911 - 1995)
3
White Nile at Malakal(1907 - 1995)
8
Lake Albert Outflow(1940 - 1977)
16
0
5
10
15
20
J F M A M J J A S O N D
0
5
10
15
20
J F M A M J J A S O N D
0
5
10
15
20
J F M A M J J A S O N D
Nile atDongola(1910 - 1995)
1
White Nileat Mogren(1911 - 1995)
5
Sobat Mouth (1905 - 1983)
10
This poster presents the average annual flow of the Nile and its main tributaries upstream of Lake
Nasser. Downstream of this point, no new tributaries join the Nile system after Aswan, and Lake
Nasser outflow is fully regulated. All data presented on this poster has been obtained from Sutcliffe
and Parks (1999) “The Hydrology of the Nile”. When comparing the relative contributions of the various
Nile components, it should be remembered that average annual discharge at key sections was
calculated from flow records of different length and periods. Full details of the basin hydrology are
given in the project ‘Synthesis Report’.
It should also be noted that the 1959 Nile agreement apportions 55.5 km3 to Egypt and 18.5 km3 to
Sudan. This was calculated in proportion to population at the time and based on a mean annual flow of
84 km3 at Dongola/Aswan inflow less 10 km3 of reservoir evaporation.
About this poster