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Database - United Nations in Bangladesh

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Water 89<br />

4.1 Surface Water, Flood and Erosion<br />

Table 4.1.1 Statistics on River Bas<strong>in</strong> and Dra<strong>in</strong>age Area<br />

Area of <strong>Bangladesh</strong><br />

Total rivers<br />

Cross boundary rivers<br />

1,47,570 sq. km.<br />

230 nos.<br />

57 nos.<br />

Major river bas<strong>in</strong> area (India, Nepal, Bhutan, Ch<strong>in</strong>a and partly <strong>Bangladesh</strong>)<br />

a. Brahmaputra bas<strong>in</strong> 5,83,000 sq. km.<br />

b. Ganges bas<strong>in</strong> 9,07,000 sq. km.<br />

c. Meghna bas<strong>in</strong> 65,000 sq. km.<br />

d. Southeastern hill bas<strong>in</strong> 45,000 sq. km.<br />

Total<br />

Dra<strong>in</strong>age area<br />

16,00,000 sq. km.<br />

a. Dra<strong>in</strong>age bas<strong>in</strong> <strong>in</strong>side country 7.50%<br />

b. Dra<strong>in</strong>age bas<strong>in</strong> outside country 92.5%<br />

Source : RHD (1998)<br />

Table 4.1.2 Extent of Flood and Correspond<strong>in</strong>g Damage<br />

Year<br />

Inundated Area % of Total Damage<br />

(sq. km) Area (million taka)<br />

1954 36778 25.55 1200<br />

1955 38850 26.98 1240<br />

1956 35883 24.64 2180<br />

1962 37296 25.90 1020<br />

1963 35224 24.46 83<br />

1968 37296 25.90 1645<br />

1970 36260 25.18 330<br />

1971 38332 26.62 380<br />

1974 38850 26.98 10000<br />

1984 25900 17.88 2500<br />

Avg. Depth of<br />

Inundation<br />

(meters)<br />

_<br />

_<br />

_<br />

_<br />

_<br />

_<br />

_<br />

_<br />

_<br />

_<br />

Duration of<br />

Flood (Days)<br />

_<br />

_<br />

_<br />

_<br />

_<br />

_<br />

_<br />

_<br />

_<br />

_<br />

1987 54390 37.77 10000 6.64 17<br />

1988 83994 58.33 50000 7.58 23<br />

1998 100000 65.00 100000 6.58 75<br />

Source : Zohra (1999)<br />

Table 4.1.3 1998 Flood Damage Statistics<br />

Number of affected districts 52<br />

Number of affected thanas 366<br />

Number of affected unions 3323<br />

[contd.]

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