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HYDROLOGIC REGIME IN THE BASIN Mean annual flow of the Nile and main tributaries upstream of

M' SYRIAN ARAB About this poster ISRAEL ----REPUBLIC IRAQ MediterraneanSea This poster presents the average annual flow of the Nile and its main tributaries upstream of Lake ,lerusale *Amman Nasser. Downstream of this point, no new tributaries join the Nile system after , and Lake (-4it4 Nasser outflow is fully regulated. All data presented on this poster has been obtained from Sutcliffe

5'303, and Parks (1999) “The Hydrology of the Nile”. When comparing the relative contributions of the various _ JORDAN Nile components, it should be remembered that average annual discharge at key sections was Ca i ro AL Jizah.*. 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 and 18.5 km3 to S, SAUDI ARABIA . This was calculated in proportion to population at the time and based on a mean annual flow of

3 3 LIBYAN I 84 km at Dongola/Aswan inflow less 10 km of evaporation. ARAB JAMAHIRIYA ,. Mean monthly flow in cubic kilometers (km3) at key stations (numbers indicated on map)

20 20 20 20 EGYPT 1 Nile at 2 3 Nile at 4 . ...::": Dongola at Mouth Tamaniat () ....:. Medina Jawf (1910 - 1995) (1903 - 1994) (1911 - 1995) (1900 - 1995) '... Asw5n 15 15 15 15

10 10 10 10 ;...'

5 Lake **. 5 5 5 Nasser ...

...... Jiddah

7 1 'Mecca 0 0 0 0 JFMAMJJASOND JFMAMJJASOND JFMAMJJASOND JFMAMJJASOND ...... ' 20 20 20 20 1 t 5 7 Blue Nile 8 White Nile 9 Outflow (/ at Mogren at Diem at (1905 - 1983) Port Sudan (1911 - 1995) (1912 - 1997) (1907 - 1995) 15 15 15 15

10 10 10 10 )

5 5 5 5

SUDAN

s) 0 0 0 0 JFMAMJJASOND JFMAMJJASOND JFMAMJJASOND JFMAMJJASOND

20 20 20 20 Khartoum Asmara 10 Sobat Mouth 15 White Nile 16 19 (1905 - 1983) at Mongalla Outflow Outflow (1940 - 1977) (1940 - 1977) (1940 - 1977) 15 15 15 15

00, 10 10 10 10

5 5 5 5

\_ Lake 13: 0 0 0 0 JFMAMJJASOND JFMAMJJASOND JFMAMJJASOND JFMAMJJASOND

Mean annual flow in cubic kilometers (km3) at key stations (numbers indicated on map)

Bahr el Aral, Avg Ann Flow and Station Name Data Period Nr [km3] Addis Ababa 1 Main Nile at Dongola 1890 - 1995 84.1 2 Atbara at mouth 1903 - 1994 11.1 3 Main Nile at Tamaniat 1911 - 1995 72.7 4 Blue Nile at Khartoum 1900 - 1995 48.3 5 White Nile at Mogren 1911 - 1995 26.0 CENTRAL AFRICAN 6 Dinder at mouth 1907 - 1997 2.8 REPUBLIC 7 Blue Nile at Diem 1912 - 1997 48.7

Legend 8 White Nile at Malakal 1905 - 1997 29.7 Administration 9 Sudd Outflow 1905 - 1983 16.1 Country boundary 10 Sobat at Hillet Dolieb 1905 - 1983 13.5 Country boundary in dispute 0 Capitat, major city 11 Baro at Gambeia 1905 - 1959 13.2

Hydrography 12 Baro at mouth 1929 - 1963 9.5 IMO Lake, reservoir 13 Lol at Nyamlel 1944 - 1985 3.2 River a 14 Jur at Wau 1942 - 1986 4.5 Intermittent river DEMOCRATIC Basin boundary REPUBLIC 15 Bahr el Jebel at Mongalla 1940 - 1977 36.0 River flows OF THE CONGO, 16 Lake Albert outflow 1940 - 1977 32.8 Site of flow measurement (number raterences stakon tha tatke or graphsl 17 Semliki at mouth 1940 - 1977 4.6 ...... Key gauging station 18 outflow 1940 - 1977 28.6 Subsidary gauging station Es ¡mate from public sources 19 Lake Victoria outflow 1940 - 1977 28.6

Magnitude of annual flow [km1 20 Kagera at Kyaka Ferry 1940 - 1978 6.3 < 3 21 Setit at Kurbur - 7.0 3 to< 5 22 Atbara at Wad el Hiliew - 4.0 5 to< 10 Nairobi 10 to< 20 23 Rahad at mouth 1908 - 1997 1.1

20 to< 40 Lake RWANDA Kigali/ \\ Vietaria 24 Akabo (incl. Gilla & Mokwa) - 2.8 40 to< 60 25 Pibor - 1.0 60 to< 85 Bukawu 26 Bahr el Ghazal (K. Dolieb) 1937 - 1964 0.3 Annual precipitation [mm] Bujumbura 27 Bahr el Arab - 0.3 50 mm isohyet ' 200 mm isohyet 28 Pongo - 0.6 5U 1U0 2U0 JOU km 7---z» UNITE!)REPUBLIt 29 Tonj 1944 - 1985 1.4 43Lambart contormat coma promcnon IWGS 12E41 BURUNOI Standard parattats 25°N and 2°N - Cantrat mandlan 32°E OF 30 Aswa 1940 -1977 3.0 , A

Information Products for Water Resources Management GCP/INT/945/ITA d.r.congo egypt eritrea ethiopia kenya sudan u.r.tanzania

The project attempted to strengthen the ability of the governments of the Nile Riparian States to take informed decisions on water resources policy and management matters regarding the common Nile resource. It included a major capacity building component. The project www.fao.org/nr/water/faonile was implemented under the umbrella of the . A project sponsored by the Government of Italy Disclaimer The 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.