Contents - Previous - Next


Results

Figure 3 shows the detailed map of soil and terrain suitability for surface irrigation per type of crop as a result of the above methodology. Tables 4 and 5 give the extent of suitable land for both types of crops per major basin group and per country respectively. Figure 4 shows the total area of land (rice plus upland crops) suitable for surface irrigation as a percentage of the total area of each of the 24 major basin groups, Figure 5 as a percentage of the area of each of the 53 African countries. As the figures show, the land in the northern part and the southern desert zones is less suitable for surface irrigation than in the rest of Africa.

TABLE 4: Soil and terrain suitability for surface irrigation by major basin group

Basin No. (0)

Area in ha Major Basin group (1)

Total area of the basin group (2)

Soil suitable for irrigation of rice (4)*

Soil suitable area of for irrigation of upland crops (5)*

Total area of soils suitable for surface irrigation (6)

As % of total area of basin 100* (6)/(2)
(7)

01

SENEGAL RIVER

48 318 100

3 491 200

154 600

3 645 800

8

02

NIGER RIVER

227 394 600

28 430 300

513 100

28 943 400

13

03

LAKE CHAD

238 163 500

31 937 700

4 586 900

36 524 600

15

04

NILE

311 236 900

88 784 000

3 235 000

92 019 000

30

05

RIFT VALLEY

63 759 300

11 958 800

1 987 900

13 946 700

22

06

SHEBELLI-JUBA

81 042 700

12 875 700

12 972 200

25 847 900

32

07

CONGO/ZAIRE RIVER

378 905 300

108 785 600

1 029 900

109 815 500

29

08

ZAMBEZI

135 136 500

37 345 600

286 900

37 632 500

28

09

OKAVANGO

32 319 200

6 476 500

135 600

6 612 100

20

10

LIMPOPO

40 186 400

8 987 100

749 000

9 736 100

24

11

ORANGE

89 636 800

9 783 200

408 300

10 191 500

11

12

SOUTH INTERIOR

64 582 600

18 630 900

739 900

19 370 800

30

13

NORTH INTERIOR

580 446 300

18 242 300

30 083 400

48 325 700

8

14

MEDITERRANEAN COAST

67 952 500

7 785 800

4 111 900

11 897 700

18

15

NORTH WEST COAST

67 062 100

5 375 500

7 189 700

12 565 200

19

16

WEST COAST

143 019 600

26 329 000

3 237 600

29 567 400

21

17

WEST CENTRAL COAST

70 477 400

16 292 000

36 400

16 328 400

23

18

SOUTH WEST COAST

51 620 000

10 665 200

3 127 300

13 792 500

27

19

SOUTH ATLANTIC COAST

36 548 500

2 201 600

1 840 300

4 041 900

11

20

INDIAN OCEAN COAST

66 378 500

13 569 400

1 282 900

14 852 000

22

21

EAST CENTRAL COAST

102 625 200

23 733 300

1 108 700

24 842 000

24

22

NORTH EAST COAST

72 570 200

6 044 400

5 734 700

11 779 100

16

23

MADAGASCAR

58 704 000

14 138 900

358 500

14 497 400

25

24

ISLANDS

934 600

134 100

50 400

184 500

20


Total for Africa

3 029 020 800

511 998 900

84 961 100

596 960 000

20

* In order to be able to add up the figures of soil and terrain suitability for rice and upland crops, it was decided that priority be given to rice where the suitability was the same for both crops.

TABLE 5: Soil and terrain suitability for surface irrigation by country

Area in ha Country (1)

Total area of the country (2)

Soil suitable for irrigation of rice (3)*

Soil suitable for irrigation of upland crops (4)*

Total area of soils suitable for surface irrigation (5)

As % of total area of country(5/2)* 100 (6)

ALGERIA

238 174 000

8 482 900

19 467 600

27 950 500

12

ANGOLA

124 670 000

22 796 600

4 187 500

26 984 100

22

BENIN

11 262 000

3 738 600

0

3 738 600

33

BOTSWANA

58 173 000

13 189 400

5 400

13 194 800

23

BURKINA FASO

27 400 000

5 438 000

0

5 438 000

20

BURUNDI

2 783 400

302 100

286 700

588 800

21

CAMEROON

47 544 000

11 784 600

26 800

11 811 400

25

CAPE VERDE

403 000

9 900

39 000

48 900

12

CENTRAL AFRICAN REP.

62 298 000

7 704 500

0

7 704 500

12

CHAD

128 400 000

20 589 200

5 077 500

25 666 700

20

COMOROS

186 100

16 900

0

16 900

9

CONGO

34 200 000

9 257 600

45 600

9 303 200

27

COTE D'IVOIRE

32 246 200

4 545 300

1 050 700

5 596 000

17

DJIBOUTI

2 320 000

246 100

50 600

296 700

13

EGYPT

100 145 000

6 477 400

655 900

7 133 300

7

EQUATORIAL GUINEA

2 805 000

919 000

0

919 000

33

ERITREA

12 189 000

1 703 000

2 565 400

4 268 400

35

ETHIOPIA

110 001 000

20 918 100

9 418 300

30 336 400

28

GABON

26 767 000

5 816 000

0

5 816 000

22

GAMBIA

1 130 000

495 100

0

495 100

44

GHANA

23 854 000

5 684 500

5 000

5 816 000

24

GUINEA

24 585 700

3 980 100

473 900

4 454 000

18

GUINEA BISSAU

3 612 000

603 700

0

603 700

17

KENYA

58 037 000

11 405 600

5 979 100

17 384 700

30

LESOTHO

3 035 000

652 000

0

652 000

21

LIBERIA

9 775 000

1 129 200

1 036 200

2 165 400

22

LIBYA

175 954 000

7 915 800

4 914 000

12 829 800

7

MADAGASCAR

58 704 000

14 138 900

358 500

14 497 400

25

MALAWI

11 848 000

2 467 200

0

2 467 200

21

MALI

124 019 000

9 939 600

202 200

10 141 800

8

MAURITANIA

102 552 000

2 462 00

6 325 300

8 787 300

9

MAURITIUS

204 000

29 000

0

29 000

14

MOROCCO + W. SAHARA

71 250 000

6 622 800

7 813 400

14 436 200

20

MOZAMBIQUE

80 159 000

17 432 000

983 700

18 415 700

23

NAMIBIA

82 490 000

11 111 700

2 133 900

13 245 600

16

NIGER

126 700 000

3 476 000

86 100

3 562 100

3

NIGERIA

92 377 000

18 080 700

317 900

18 398 600

20

RWANDA

2 634 000

220 600

80 300

300 900

11

SAO TOME & PRINCIPE

96 000

10 700

0

10 700

11

SENEGAL

19 672 000

2 742 500

290 200

3 032 700

15

SEYCHELLES

45 500





SIERRA LEONE

7 174 000

985 000

724 500

1 709 500

24

SOMALIA

63 766 000

8 361 500

4 427 600

12 789 100

20

SOUTH AFRICA

122 104 000

21 434 600

1 163 600

22 598 200

19

SUDAN

250 581 000

66 955 100

1 814 100

68 769 200

27

SWAZILAND

1 736 400

339 500

0

339 500

20

TANZANIA

94 509 000

23 344 700

908 700

24 253 400

26

TOGO

5 678 500

1 114 700

0

1 114 700

20

TUNISIA

16 361 000

1 625 500

1 227 900

2 853 400

17

UGANDA

23 588 000

7 652 000

23 700

7 675 700

33

ZAIRE

234 486 000

78 728 100

9 700

78 737 800

34

ZAMBIA

75 261 000

26 540 700

2 4000

26 543 100

35

ZIMBABWE

39 076 000

10 382 600

782 200

11 164 800

29

Total for Africa

3 029 020 800

511 998 900

84 961 100

596 960 000

20

*In order to be able to sum the figures of soil and terrain suitability for rice end upland crops, it was decided that priority be given to rice where the suitability was the same for both crops. For this reason the figures given in column 4 must be considered as a lower limit for soil suitability to irrigated upland crops.

Figure 3: Soil and terrain suitability for surface irrigation

Figure 4: Extent of land suitable for surface irrigation (as % of basin area)

Figure 5: Extent of land suitable for surface irrigation (as % of country area)


Contents - Previous - Next